Pulsar
Using the Neutron Star Interior Composition Explorer (NICER), an international team of astronomers have detected a new accreting millisecond X-ray pulsar. The newfound pulsar, designated MAXI J1816–195, has a spin period of about 1.89 milliseconds. The finding is reported in a paper published August 9 on the arXiv pre-print repository.

Millisecond pulsars (MSPs) are evolved neutron stars with short spin periods that have gone through a long period of mass transfer in a low-mass X-ray binary phase. Globular clusters (GCs)—conglomerations of tens of thousands or millions of stars—are prolific environments for the formation of MSPs. However, in NGC 6397—one of two GCs closest to Earth—only one MSP had been identified until recently.

The first pulsar was discovered in 1967. With an increase in pulsar observations, astronomers have found that some pulsars have a proper motion velocity greater than 1000 km/s, and the number of such pulsars is growing each year.

Ph.D. candidate GUO Yunlang and Prof. WANG Bo from the Yunnan Observatories of the Chinese Academy of Sciences investigated the formation of black widow pulsars through ultracompact X-ray binaries (UCXBs) with He star companions.

Pulsars—rapidly-spinning remnants of stars that flash like a lighthouse—occasionally show extreme variations in brightness. Scientists predict that these short bursts of brightness happen because dense regions of interstellar plasma (the hot gas between stars) scatter the radio waves emitted by the pulsar. However, we still don't know where the energy sources required to form and sustain these dense plasma regions come from. To better understand these interstellar formations, we require more detailed observations of their small-scale structure, and a promising avenue for this is in the scintillation, or "twinkling," of pulsars.

The toymaker will reintroduce three toy lines this week at Comic-Con as part of a strategy to dig deeper into its intellectual property portfolio.

Using NASA's Fermi space telescope, Chinese astronomers have investigated a newly discovered millisecond pulsar known as PSR J1835−3259B. As a result, they identified gamma-ray pulsations from this source. The finding is reported in a paper published June 27 on the arXiv pre-print server.

More than 50 years after the discovery of the first pulsar, the detailed physics of the emission process in a pulsar magnetosphere still remains unclear.

Astronomers have discovered a neutron star so young it's barely a teenager. The post Astronomers Find a Brand new Pulsar That's Probably Less Than 14 Years old appeared first on Universe Today.

Pulsar has quickly made a name for itself in the ultra-light gaming mouse market with its first few releases. We take a look at its smallest, lightest offering yet to see if the young company's latest mouse can live up to the hype.

Belgian company Tractebel will lead the PULSAR consortium conducting research on dynamic radioisotope power systems fueled by plutonium 238 for space applications - to provide spacecraft and astronauts with electricity and heat when the sun does not supply enough power.

A young pulsar is blazing through the Milky Way at a speed of over a million miles per hour. This stellar speedster, witnessed by NASA's Chandra X-ray Observatory, is one of the fastest objects of its kind ever seen. This result teaches astronomers more about how some of the bigger stars end their lives.

Astronomers using data from the VLA Sky Survey have discovered one of the youngest known neutron stars -- possibly as young as only 14 years. The dense remnant of a supernova explosion was revealed when bright radio emission powered by the pulsar's powerful magnetic field emerged from behind a thick shell of debris from the explosion.

Astronomers analyzing data from the VLA Sky Survey (VLASS) have discovered one of the youngest known neutron stars—the superdense remnant of a massive star that exploded as a supernova. Images from the National Science Foundation's Karl G. Jansky Very Large Array (VLA) indicate that bright radio emission powered by the spinning pulsar's magnetic field has only recently emerged from behind a dense shell of debris from the supernova explosion.

Astronomers have discovered one of the youngest known neutron stars - possibly as young as only 14 years. The dense remnant of a supernova explosion was revealed when bright radio emission powered by the pulsar's powerful magnetic field emerged from behind a thick shell of debris from the explosion.

Scientists have found that old and fast spinning neutron stars called millisecond pulsars could be responsible for an unexplained signal from the center of our Milky Way.

An international team of astronomers reports the discovery of a new millisecond pulsar in the globular cluster NGC 6652. The newly found pulsar received designation PSR J1835−3259B. The study detailing the finding and disclosing fundamental parameters of this object was published May 30 on the arXiv pre-print server.

Using the MeerKAT array, an international team of astronomers has detected a new class of radio-emitting neutron star! The post A Pulsar has Been Found Turning so Slowly Astronomers Didn't Even Think it was Possible: Once Every 76 Seconds appeared first on Universe Today.

Most pulsars rotate once every couple of seconds, but one pulsar completes a revolution just once every 76 seconds

Pulsars are the ultradense cores of gigantic stars that emit beams of radio waves in regular pulses, like cosmic lighthouses.

The pulsar PSR J0523−7125 is so bright that astronomers thought it was a distant galaxy.

Author(s): Katie McCormickA new simulation of the evolution of binary stars shows that previously neglected millisecond pulsars could explain the excess gamma-ray radiation seen in our Galaxy’s center. [Physics 15, 71] Published Wed May 11, 2022

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An international team of astronomers reports the finding of a new pulsar in the Large Magellanic Cloud (LMC) as part of the Australian Square Kilometre Array Pathfinder (ASKAP) Variables and Slow Transients (VAST) survey. The newly detected pulsar, designated PSR J0523−7125, turns out to be a highly circularly polarized and variable radio source. The discovery was detailed in a paper published May 3 on arXiv.org.

The Five-hundred-meter Aperture Spherical Radio Telescope (FAST), the largest telescope ever built by far, has discovered more than 200 pulsars. PSR J1631+1252 is an isolated normal pulsar with a rotational period of 0.310 s discovered by the FAST in the Commensal Radio Astronomy FAST Survey (CRAFTS).

A team of researchers at the University of Illinois Urbana-Champaign have found a way for travelers through the Solar System to work out exactly where they are, without needing help from ground-based observers on Earth. They have refined the pulsar navigation technique, which uses X-ray signals from distant pulsars, in a way similar to how … Continue reading "Traveling the Solar System with Pulsar Navigation" The post Traveling the Solar System with Pulsar Navigation appeared first on Universe Today.

The Milky Way Galaxy has its share of oddities, from black holes and magnetars to luminous blue variable stars and strange new worlds. But, have you ever heard of a “black widow binary?” Not exactly an easy name to wrap your head around, especially if you’re afraid of spiders. But, these things actually exist in … Continue reading "A Pulsar and Star are Orbiting Each Other Every 62 Minutes. The Fastest “Black Widow” Binary Ever Seen" The post A Pulsar and Star are Orbiting Each Other Every 62 Minutes. The Fastest “Black Widow” Binary Ever Seen appeared first on Universe Today.

When a star explodes and dies in a supernova, it takes on a new life of sorts. Pulsars are the extremely rapidly rotating objects left over after massive stars have exhausted their fuel supply. They are extremely dense, with a mass similar to the sun crammed into a region the size of a large city. […]

Using NASA's Chandra X-ray observatory and Australia Telescope Compact Array (ATCA), astronomers have investigated a pulsar wind nebula, dubbed "the Goose," powered by a young pulsar known as PSR J1016–5857. Results of the study, published April 27 on the arXiv pre-print server, deliver important insights into the nature of this nebula.

Using a technique to block certain wavelengths of light, researchers hope to discover many more hidden pulsars -- Read more on ScientificAmerican.com

Ever hear of the Galactic Center GeV Excess? No, it’s not a cosmic rock band, although that’s a

Ever hear of the Galactic Center GeV Excess? No, it’s not a cosmic rock band, although that’s a great name for one. Actually, it’s what astronomers call a super-high rate of gamma-ray radiation coming from the heart of our Milky Way Galaxy. Since this Galactic Center Excess was first detected in 2009, people thought it … Continue reading "Pulsars Could Explain the Excess of Gamma Radiation Coming from the Center of the Milky Way" The post Pulsars Could Explain the Excess of Gamma Radiation Coming from the Center of the Milky Way appeared first on Universe Today.

An international research team, including scientists at Australia's national science agency, CSIRO, has used a new observation technique to discover the brightest extragalactic pulsar known, and it could even be the most luminous one ever found.

A glow of gamma rays from within our galaxy has long puzzled astronomers, but now it seems they could be produced by a specific type of millisecond pulsar

An international team of astronomers reports the discovery of a rare double neutron star millisecond pulsar. The newfound binary pulsar, designated PSR J1325−6253, consists of two neutron stars orbiting one another every 1.8 days. The finding is detailed in a paper published April 14 on arXiv.org.

Using the MeerKAT radio telescope, an international team of astronomers has investigated a globular cluster known as NGC 6440. In result, two new millisecond pulsars have been detected in this cluster, which received designations NGC 6440G and NGC 6440H. The discovery was presented in a paper published April 1 on the arXiv pre-print server.

A research team led by Prof. Wang Bo from Yunnan Observatories of the Chinese Academy of Sciences has explained the formation of millisecond pulsars (MSPs) with long orbital periods by accretion-induced collapse of white dwarfs.

Using the MeerKAT radio telescope, an international team of astronomers has detected 13 new pulsars in the globular cluster NGC 1851. Twelve of them turned out to be millisecond pulsars (MSPs). The discovery was reported March 23 on the arXiv pre-print server.

Using ESA's XMM-Newton telescope, Indian astronomers have performed X-ray observations of a binary X-ray pulsar known as LMC X-4. The observational campaign resulted in the detection of quasi-periodic oscillations (QPOs) in this source. The finding is reported in a paper published March 15 on arXiv.org.

A new study by Jonathan Katz of Washington University in St. Louis suggests that a recently discovered periodic radio transient source, designated GLEAM-X J162759.5−523504.3, may be a rare white dwarf pulsar. The finding was detailed in a paper published March 16 on the arXiv pre-print server.

Astronomers have performed a comprehensive study of a peculiar "black widow" millisecond pulsar known as PSR J0610−2100. Results of this research, published March 11 on the arXiv pre-print repository, deliver essential information regarding the behavior and properties of this source.

An international team of astronomers has performed timing observations of an eccentric millisecond pulsar known as PSR J0955−6150. Results of the observational campaign, published March 1 on the arXiv pre-print server, deliver important insights into the nature of this object.

Astronomers discovered the first exoplanets in 1992. They found a pair of them orbiting the pulsar PSR B1257+12 about 2,300 light-years from the Sun. Two years later they discovered the third planet in the system.

Author(s): Xiao Xue, Zi-Qing Xia, Xingjiang Zhu, Yue Zhao, Jing Shu, Qiang Yuan, N. D. Ramesh Bhat, Andrew D. Cameron, Shi Dai, Yi Feng, Boris Goncharov, George Hobbs, Eric Howard, Richard N. Manchester, Aditya Parthasarathy, Daniel J. Reardon, Christopher J. Russell, Ryan M. Shannon, Renée Spiewak, Nithyanandan Thyagarajan, Jingbo Wang, Lei Zhang, and Songbo Zhang (PPTA Collaboration)The authors analyze the data from the Parkes pulsar timing array to study the onset of ultralight spin-one dark photon dark matter. [Phys. Rev. Research 4, L012022] Published Tue Feb 22, 2022

Turkish astronomers have inspected GLEAM-XJ162759.5–523504.3—a recently discovered pulsar with a relatively long spin period. Results of the study, published February 14 on the arXiv pre-print repository, deliver important information regarding the evolution of this peculiar object.

An international team of astronomers reports the detection of a new millisecond pulsar (MSP) using the Green Bank Telescope (GBT). The newfound pulsar, designated PSR J1555−2908, turns out to be one of the so-called "black widow" MSPs. The finding is detailed in a paper published February 10 on arXiv.org.

Using the Five-hundred-meter Aperture Spherical radio Telescope (FAST), Chinese astronomers have investigated a peculiar emission phenomena exhibited by a pulsar known as PSR B1859+07. Results of the study, published January 18 on the arXiv pre-print repository, could shed light on abnormal emission modes observed in some pulsars.

Pulsars are neutron stars. They are formed when an old star explodes as a supernova, so you would expect to find them in the center of its supernova remnant. But not always. Astronomers have learned that some pulsars are ejected from its remnant. The Very Large Array has discovered one pulsar that is quite a kick.

Using the Five-hundred-meter Aperture Spherical radio Telescope (FAST), a research team led by Dr. Wang Shuangqiang from the Xinjiang Astronomical Observatory (XAO) of the Chinese Academy of Sciences discovered plasma lensing phenomenon in a black widow pulsar PSR J1720-0533.

Author(s): Michael SchirberAstronomical observations of pulsars have provided new information about a possible phase transition in the early Universe. [Physics 14, s160] Published Wed Dec 15, 2021

Author(s): Xiao Xue, Ligong Bian, Jing Shu, Qiang Yuan, Xingjiang Zhu, N. D. Ramesh Bhat, Shi Dai, Yi Feng, Boris Goncharov, George Hobbs, Eric Howard, Richard N. Manchester, Christopher J. Russell, Daniel J. Reardon, Ryan M. Shannon, Renée Spiewak, Nithyanandan Thyagarajan, and Jingbo WangAstronomical observations of pulsars have provided new information about a possible phase transition in the early Universe. [Phys. Rev. Lett. 127, 251303] Published Wed Dec 15, 2021

After monitoring a pair of pulsars in tight orbit around one another for 16 years, astronomers conclude that their behaviour is consistent with Einstein’s predictions

Author(s): Lijing ShaoSixteen years of timing data from the double pulsar confirm the validity of Einstein’s theory of general relativity to a new level. [Physics 14, 173] Published Mon Dec 13, 2021

Author(s): M. Kramer et al.Sixteen years of timing data from the double pulsar confirm the validity of Einstein’s theory of general relativity to a new level. [Phys. Rev. X 11, 041050] Published Mon Dec 13, 2021

Using the MeerKAT telescope, astronomers have conducted radio observations of a millisecond pulsar known as J1909−3744. The study found that J1909−3744 experiences the so-called mode changing, which makes it only the third known millisecond pulsar that exhibits such behavior. The finding was detailed in a paper published December 2 on the arXiv pre-print server.

A group of scientists working at the National Centre for Radio Astrophysics (NCRA), Pune have for the first time unraveled the eclipse mechanisms for the millisecond pulsars in compact binary systems using the upgraded Giant Metrewave Radio Telescope (uGMRT). Eclipses in millisecond pulsars have been known since the 1980's, but the exact cause of these eclipses have not been understood till now. Devojyoti Kansabanik a Ph.D. student at NCRA is the lead author of the paper describing this work, which was done under the guidance of Dr. Bhaswati Bhattacharyya, also at NCRA. Dr. Jayanta Roy of NCRA and Prof. Benjamin Stappers from the Jodrell Bank Centre for Astrophysics, The University of Manchester are the other authors.

Using data from various spacecraft, astronomers have investigated an ultra-luminous X-ray pulsar known as NGC 7793 P13. The new study, published November 1 on the arXiv pre-print server, yields essential information regarding timing and spectral properties of this source.

Using NASA's Nuclear Spectroscopic Telescope Array (NuSTAR) spacecraft, Russian astronomers have investigated a transient X-ray pulsar known as XTE J1946+274. Results of the study, presented in a paper published October 11 on arXiv.org, provide more insights into the nature of this object.

A new project is investigating the role pulsars play in creating galactic, high-energy cosmic rays.

Using the Five-hundred-meter Aperture Spherical radio Telescope (FAST), astronomers have discovered a new pulsar in the globular cluster NGC 6712. The newly found object is a so-called "black widow," and the first radio pulsar identified so far in this cluster. The finding is detailed in a paper published September 14 on arXiv.org.

The discovery was a scientific breakthrough, although his Nobel was controversial. Some said at least a share of the prize should have gone to one of his graduate students.

He received a Nobel Prize for his finding. Some criticized the prize because it was a graduate student in his lab who had first detected the signals.

Galaxies host supermassive black holes, which weigh millions to billions times more than the sun. When galaxies collide, pairs of supermassive black holes at their centers also lie on the collision course. It may take millions of years before two black holes slam into each other. When the distance between them is small enough, the black hole binary starts to produce ripples in space-time, which are called gravitational waves.

Using ground-based facilities, an international team of astronomers has conducted a broadband radio study of a slowly rotating radio pulsar known as PSR J0250+5854. Results of this investigation, published September 1 on the arXiv pre-print server, provide more insights into the nature of this source.

By analyzing the data from NASA's Fermi spacecraft and Major Atmospheric Gamma Imaging Cherenkov (MAGIC) telescope, an international team of astronomers has investigated a millisecond pulsar known as PSR J0218+4232. Results of the study, published August 25 on arXiv.org, shed more light on the emission from this source.

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Using ART-XC and eROSITA telescopes onboard the Spectrum Roentgen Gamma (SRG) mission, an international team of astronomers has detected a new pulsar. The newly found object, designated SRGA J204318.2+443815, turns out to be a long-period, faint X-ray pulsar in a distant binary system. The finding is reported in a paper published July 12 on arXiv.org.

Using the AstroSat spacecraft, Indian astronomers have observed the Cepheus X-4 X-ray pulsar during its outburst in 2018. Results of these observations provide important insights into the properties of this outburst and shed more light on the nature of the pulsar. The study was presented in a paper published July 8 on arXiv.org.

A team of Chinese astronomers has conducted a study aimed at inspecting formation scenarios for the millisecond pulsar PSR J1946+3417. They found that the pulsar was most likely formed as a result of a phase transition. The research was published June 10 on the arXiv pre-print server.

Author(s): Marric StephensObservations made by the LHAASO gamma-ray observatory show huge differences in the rate at which charged particles propagate through the Milky Way. [Physics 14, s77] Published Wed Jun 16, 2021

Using ESA's XMM-Newton spacecraft, an international team of astronomers has detected a new energetic rotation-powered pulsar in the Small Magellanic Cloud (SMC). The newly found pulsar, designated PSR J0058–7218, appears to be the most energetic pulsar so far discovered in the SMC. The finding is detailed in a paper published May 17 on arXiv.org.

An international team of astronomers has carried out X-ray observations of a massive millisecond pulsar known as PSR J0740+6620. Results of the observational campaign, presented in a paper published May 14 on the arXiv pre-print repository, deliver important information regarding the properties of this pulsar.

Using the Five-hundred-meter Aperture Spherical radio Telescope (FAST), a research team led by Prof. Han Jinlin from National Astronomical Observatories of Chinese Academy of Sciences (NAOC) has discovered 201 pulsars, including many very faint pulsars, 40 millisecond pulsars (MSPs), and 16 pulsars in binaries.


Pulsars—another name for fast-spinning neutron stars—originate from the imploded cores of massive dying stars through supernova explosion.

Scientists using South Africa's MeerKAT radio telescope have detected 8 new millisecond pulsars in the hearts of globular clusters.

A group of astronomers has discovered 8-millisecond pulsars located within the dense clusters of stars, known as “globular

A group of astronomers has discovered eight millisecond pulsars located within the dense clusters of stars, known as "globular clusters," using South Africa's MeerKAT radio telescope.

The discovery that the nebulae surrounding the most powerful pulsars are pumping out ultra-high-energy gamma rays could rewrite the book about the rays' galactic origins. Pulsars are rapidly rotating, highly magnetized collapsed stars surrounded by nebulae powered by winds generated inside the pulsars.

Faced with the tragic loss of the Arecibo observatory in Puerto Rico and the often prohibitive cost of satellite missions, astronomers are searching for savvy alternatives to continue answering fundamental questions in physics.

Faced with the tragic loss of the Arecibo observatory in Puerto Rico and the often prohibitive cost of satellite missions, astronomers are searching for savvy alternatives to continue answering fundamental questions in physics.

A global science collaboration using data from NASA’s Neutron star Interior Composition Explorer (NICER) telescope on the International Space Station has discovered X-ray

A global science collaboration using data from NASA's Neutron star Interior Composition Explorer (NICER) telescope on the International Space Station has discovered X-ray surges accompanying radio bursts from the pulsar in the Crab Nebula. The finding shows that these bursts, called giant radio pulses, release far more energy than previously suspected.

Scientists using coordinated observations of the Crab pulsar in a number of frequencies, have discovered that the 'giant radio pulses' which it emits include an increase in x-ray emissions in addition to the radio and visible light emissions that had been previously observed. This finding, published in Science, implies that these pulses are hundreds of times more energetic than previously believed.

Scientists, using coordinated observations of the Crab pulsar in a number of frequencies, have discovered that the 'giant radio pulses' which it emits include an increase in x-ray emissions in addition to the radio and visible light emissions that had been previously observed.

A group led by scientists from the RIKEN Cluster for Pioneering Research, using coordinated observations of the Crab pulsar in a number of frequencies, have discovered that the "giant radio pulses" which it emits include an increase in X-ray emissions in addition to the radio and visible light emissions that had been previously observed. This finding, published in Science, implies that these pulses are hundreds of times more energetic than previously believed and could provide insights into the mysterious phenomenon of "fast radio bursts (FRBs)." Giant radio pulses—a phenomenon where extremely short, millisecond-duration pulses of radio waves are emitted—have been observed in association with a dozen pulsars in our galaxy, but little is known about the mechanism that causes them. It has been proposed that they may also be the origin of "fast radio bursts"—rapid bursts of radio waves that are believed to originate from energetic events in the extragalactic universe. To gain insights

Using the Neutron Star Interior Composition Explorer (NICER) instrument aboard the International Space Station (ISS) and NASA's Swift spacecraft, astronomers from India have investigated an X-ray pulsar known as 2S 1417–624. Results of the study, published March 24 on arXiv.org, provide important information about the evolution of different timing and spectral properties of this source during its recent outburst.

Using the MeerKAT radio telescope array, an international team of astronomers has detected eight new millisecond pulsars. The newfound objects are located in six globular clusters. The finding is reported in a paper published March 8 on the arXiv pre-print repository.

The North American Nanohertz Observatory for Gravitational Waves (NANOGrav) is a gravitational-wave detector that monitors areas in the vicinity of Earth using a network of pulsars (i.e., clock-like stars). At the end of 2020, the NANOGrav collaboration gathered evidence of fluctuations in the timing data of 45 pulsars, which could be compatible with a stochastic gravitational wave background (SGWB) signal at nanohertz frequencies.

Using NASA's Swift and Chandra space observatories, astronomers have investigated an ultraluminous X-ray pulsar known as M51 ULX-7. The study, detailed in a paper published February 16 on the arXiv pre-print server, sheds more light on the X-ray variability of this source.

Author(s): Michael SchirberA pulsar survey has detected a potential signal from low-frequency gravitational waves, which theorists are eager to explain. [Physics 14, 15] Published Thu Jan 28, 2021

Author(s): John Ellis and Marek LewickiPulsar timing data used to provide upper limits on a possible stochastic gravitational wave background (SGWB). However, the NANOGrav Collaboration has recently reported strong evidence for a stochastic common-spectrum process, which we interpret as a SGWB in the framework of cosmic strings. The poss... [Phys. Rev. Lett. 126, 041304] Published Thu Jan 28, 2021

Astronomers report the finding of a new candidate redback millisecond pulsar (MSP) binary associated with a gamma-ray source known as 4FGL J0940.3–7610. The newly found object is a short-period compact binary exhibiting X-ray emission that consists of a low-mass neutron star and a companion star with a mass most likely over 0.4 solar masses. The discovery is detailed in a paper published January 21 on the arXiv pre-print server.

Using NASA's Nuclear Spectroscopic Telescope Array (NuSTAR), an international team of astronomers has conducted X-ray observations of an accreting X-ray pulsar known as XTE J1858+034. Results of the study, presented in a paper published January 18 on the arXiv pre-print server, provide more insights into the properties of this source.

As our Sun moves along its orbit in the Milky Way, it is gravitationally tugged by nearby stars,

It is well known that the expansion of the universe is accelerating due to a mysterious dark energy. Within galaxies, stars also experience an acceleration, though this is due to some combination of dark matter and the stellar density. In a new study, researchers have now obtained the first direct measurement of the average acceleration taking place within our home galaxy, the Milky Way.

It is well known that the expansion of the universe is accelerating due to a mysterious dark energy. Within galaxies, stars also experience an acceleration, though this is due to some combination of dark matter and the stellar density. In a new study to be published in Astrophysical Journal Letters researchers have now obtained the first direct measurement of the average acceleration taking place within our home galaxy, the Milky Way. Led by Sukanya Chakrabarti at the Institute for Advanced Study with collaborators from Rochester Institute of Technology, University of Rochester, and University of Wisconsin-Milwaukee, the team used pulsar data to clock the radial and vertical accelerations of stars within and outside of the galactic plane. Based on these new high-precision measurements and the known amount of visible matter in the galaxy, researchers were then able to calculate the Milky Way's dark matter density without making the usual assumption that the galaxy is in a steady-state.

Using the Arecibo 305-m radio telescope, an international team of astronomers has investigated eight binary millisecond pulsars (MSPs). Results of this study, presented in a paper published December 30 on the arXiv pre-print server, provide important information about the properties of these sources.
