Neutron Star
The oscillations in binary neutron stars before they merge could have big implications for the insights scientists can glean from gravitational wave detection.
Scientists have recorded millimeter-wavelength light from a fiery explosion caused by the merger of a neutron star with
Scientists have for the first time recorded millimeter-wavelength light from a fiery explosion caused by the merger of a neutron star with another star. The team also confirmed this flash of light to be one of the most energetic short-duration gamma-ray bursts ever observed.
Scientists using the Atacama Large Millimeter/submillimeter Array (ALMA)—an international observatory co-operated by the U.S. National Science Foundation's National Radio Astronomy Observatory (NRAO)—have for the first time recorded millimeter-wavelength light from a fiery explosion caused by the merger of a neutron star with another star. The team also confirmed this flash of light to be one of the most energetic short-duration gamma-ray bursts ever observed, leaving behind one of the most luminous afterglows on record. The results of the research will be published in an upcoming edition of The Astrophysical Journal Letters.
A dense, collapsed star spinning at 707 times per second—making it one of the fastest spinning neutron stars
An international team has simulated what happens when a black hole and neutron star merge, and the results were pretty The post A Black Hole can Tear a Neutron Star Apart in Less Than 2 Seconds appeared first on Universe Today.
Life’s not too good if you’re the companion of a black widow. Here on Earth, spiders by that name feast on their smaller significant others after mating. Out in space, some weird objects do the same thing to their closeby neighbors. They’re rapidly spinning neutron stars that slowly destroy their companion stars with powerful outflows … Continue reading "The Heaviest Neutron Star Ever Seen got There by Feasting on its Companion" The post The Heaviest Neutron Star Ever Seen got There by Feasting on its Companion appeared first on Universe Today.
Astronomers have spied the heaviest neutron star to date 3,000 light-years away from Earth. The "black widow," a dense, collapsed star that's devouring its stellar companion, also spins 707 times per second, which also makes it one of the fastest spinning neutron stars.
Millisecond pulsars spin far more rapidly than expected for a collapsed star. The best chance to study these neutron stars is to find a black widow system where the pulsar has evaporated and eaten much of its companion star. The Keck I telescope was just able to capture spectra of one such companion, allowing astronomers to weigh its pulsar. It's the heaviest found to date, and perhaps near the upper limit for a neutron star.
A dense, collapsed star spinning 707 times per second—making it one of the fastest spinning neutron stars in the Milky Way galaxy—has shredded and consumed nearly the entire mass of its stellar companion and, in the process, grown into the heaviest neutron star observed to date.
Scientists develop a telescope to detect violent collisions of dead suns known as neutron stars.
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Using supercomputer calculations, scientists at the Max Planck Institute for Gravitational Physics in Potsdam and from Japan show a consistent picture for the first time: They modeled the complete process of the collision of a black hole with a neutron star. In their studies, they calculated the process from the final orbits through the merger to the post-merger phase in which, according to their calculations, high-energy gamma-ray bursts may occur. The results of their studies have now been published in the journal Physical Review D.
Magnetars are some of the most fascinating astronomical objects. One teaspoon of the stuff they are made out of would weigh almost one billion tons, and they have magnetic fields that are hundreds of millions of times more powerful than any magnetic field that exists today on Earth. But we don't know much about how they form. A new paper points to one possible source—mergers of neutron stars.
Magnetars are some of the most fascinating astronomical objects. One teaspoon of the stuff they are made out of would weigh almost one billion tons, and they have magnetic fields that are hundreds of millions of times more powerful than any magnetic that exists today on Earth. But we don’t know much about how they … Continue reading "The Case is Building That Colliding Neutron Stars Create Magnetars" The post The Case is Building That Colliding Neutron Stars Create Magnetars appeared first on Universe Today.
An international research team has for the first time combined data from heavy-ion experiments, gravitational wave measurements and other astronomical observations using advanced theoretical modeling to more precisely constrain the properties of nuclear matter as it can be found in the interior of neutron stars. The results were published in the journal Nature.
An international team of scientists has discovered a strange radio-emitting neutron star, which rotates extremely slowly, completing one
An international team led by a University of Sydney scientist has discovered an unusual radio signal emitting neutron star that rotates extremely slowly, completing one rotation every 76 seconds.
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.
A pair of researchers, one with Manly Astrophysics, the other with Universidad de Murcia, has proposed the existence of a new type of neutron star. In their paper published in the journal Physical Review Letters, Arthur Suvorov and Kostas Glampedakis suggest that an exotic type of neutron star could be created if there is an ultra-strong magnetic field created during a collision between neutron stars.
Author(s): Ryan WilkinsonThe merging of two neutron stars could give birth to a third, more extreme variety that is stabilized by an incredibly strong magnetic field. [Physics 15, s37] Published Wed Mar 23, 2022
Author(s): Arthur G. Suvorov and Kostas GlampedakisThe merging of two neutron stars could give birth to a third, more extreme variety that is stabilized by an incredibly strong magnetic field. [Phys. Rev. D 105, L061302] Published Wed Mar 23, 2022
A recent measurement of the neutron-rich “skin” around lead nuclei reveals new details of neutron behavior and the
Dark energy is central to our modern theory of cosmology. We know the universe is expanding at an
When two neutron stars spiral into one another and merge to form a black hole—an event recorded in 2017 by gravitational wave detectors and telescopes worldwide—does it immediately become a black hole? Or does it take a while to spin down before gravitationally collapsing past the event horizon into a black hole?
Scientists provide the first simulation of neutron star collisions in extensions of general relativity relevant for cosmology, offering a new approach to test gravity.
A huge amount of mysterious dark energy is necessary to explain cosmological phenomena, such as the accelerated expansion of the Universe, using Einstein's theory. But what if dark energy was just an illusion and general relativity itself had to be modified? A new SISSA study, published in Physical Review Letters, offers a new approach to answer this question. Thanks to huge computational and mathematical effort, scientists produced the first simulation ever of merging binary neutron stars in theories beyond general relativity that reproduce a dark-energy like behavior on cosmological scales. This allows the comparison of Einstein's theory and modified versions of it, and, with sufficiently accurate data, may solve the dark energy mystery.
Black holes and neutron stars are some of the most extreme objects in the Universe, ripping up neighboring stars. But they are messy eaters and much of they take in gets flung back into space. Scientists have now observed a neutron star blasting out warm and cold wind as it devoured another star. The findings shed new light on the behavior of these stellar cannibals and how they influence the evolution of galaxies.
Using the most powerful telescopes on Earth and in space, a team of astronomers has found for the first time blasts of hot, warm and cold winds from a neutron star whilst it consumes matter from a nearby star. The discovery provides new insight into the behaviours of some of the most extreme objects in the universe.
Using the most powerful telescopes on Earth and in space, a team of astronomers has found for the first time blasts of hot, warm and cold winds from a neutron star whilst it consumes matter from a nearby star. The discovery provides new insight into the behaviors of some of the most extreme objects in the universe.
When two neutron stars spiral into one another and merge to form a black hole — an event
When two neutron stars spiral into one another and merge to form a black hole — an event
Continuing X-ray observations by Chandra of the kilonova from the merger of two neutron stars to form a black hole hint at new processes. Initially, a gamma-ray burst and subsequent X-ray emissions told of a jet of material produced by the merger, but X-rays from this jet should be dimming. They're not, suggesting that ejecta from the merger, given an extra bounce from the merged neutron stars a second before collapse, is also generating X-rays.
Author(s): William G. Newton, Sarah Cantu, Shuxi Wang, Amber Stinson, Mark Alexander Kaltenborn, and Jirina Rikovska StoneNuclear pasta is an exotic form of nuclear matter that occurs in the crust of neutron stars below saturation density. Various exotic nuclear structures with cylindrical, planar, and more complicated geometries evolve from the Coulomb lattice of nuclei immersed in a fluid of neutrons. Such structures in the crust should not only affect how a neutron star cools and rotates but also the height of the “mountains” that the crust can sustain—potentially detectable as persistent sources of gravitational waves. By performing a large set of quantum calculations the authors show that the energy landscape of nuclear pasta consists of multiple local minima with very similar energies. Hence, at the characteristic temperatures nuclear pasta becomes a
Author(s): Nicolas Kovensky, Aaron Poole, and Andreas SchmittBy using a holographic “top-down” description of dense baryonic matter, the authors study the construction of neutron stars. They model the crust of the star and compute the location of the crust-core transition dynamically. They find that this description does account for neutron stars that meet the current experimental constraints for mass, radius, and tidal deformability. [Phys. Rev. D 105, 034022] Published Wed Feb 23, 2022
Neutron stars are almost as violent as black holes. Both have extremely strong gravity capable of crushing anything.
An international scientific group with outstanding Valencian participation has managed to measure for the first time oscillations in the brightness of a magnetar during its most violent moments. In just a 10th of a second, the magnetar released energy equivalent to that produced by the sun in 100,000 years. The observation was carried out without human intervention, thanks to an artificial intelligence system developed at the Image Processing Laboratory (IPL) of the University of Valencia.
An international scientific group has managed to measure for the first time oscillations in the brightness of a neutron star during its most violent moments. In just a tenth of a second, the magnetar released energy equivalent to that produced by the Sun in 100,000 years.
In June of 2018, telescopes around the world picked up a brilliant blue flash from the spiral arm
The discovery, based on an unusual event dubbed 'the Cow', may offer astronomers a new way to spot infant compact objects.
A powerful cosmic burst dubbed AT2018cow, or 'the Cow,' was much faster and brighter than any stellar explosion astronomers had seen. They have now determined it was likely a product of a dying star that, in collapsing, gave birth to a compact object in the form of a black hole or neutron star.
In June of 2018, telescopes around the world picked up a brilliant blue flash from the spiral arm of a galaxy 200 million light years away. The powerful burst appeared at first to be a supernova, though it was much faster and far brighter than any stellar explosion scientists had yet seen. The signal, procedurally labeled AT2018cow, has since been dubbed simply "the Cow," and astronomers have catalogued it as a fast blue optical transient, or FBOT—a bright, short-lived event of unknown origin.
University of Alberta physicists have created a new, simpler way to model collisions between neutron stars. The model
About 20 years ago, a physicist had an idea to reveal insights about a fundamental but enigmatic force at work in some of the most extreme environments in the universe. These environments include an atom's nucleus and celestial bodies known as neutron stars, both of which are among the densest objects known to humanity. For comparison, matching the density of a neutron star would require squeezing all the Earth's mass into a space about the size of a stadium.
About 20 years ago, Michigan State University's B. Alex Brown had an idea to reveal insights about a fundamental but enigmatic force at work in some of the most extreme environments in the universe.
The quest to uncover the nature of dark matter is one of the greatest challenges in science today, but the key to finally understanding this mysterious substance may well lie in the stars.
Most elements lighter than iron are forged in the cores of stars, but scientists have puzzled over what could give rise to gold, platinum, and the rest of the universe's heavy elements. study finds that of two long-suspected sources of heavy metals, one of them -- a merger between two neutron stars -- is more of a goldmine than the other.
Most elements lighter than iron are forged in the cores of stars. A star’s white-hot center fuels the
Most elements lighter than iron are forged in the cores of stars. A star's white-hot center fuels the fusion of protons, squeezing them together to build progressively heavier elements. But beyond iron, scientists have puzzled over what could give rise to gold, platinum, and the rest of the universe's heavy elements, whose formation requires more energy than a star can muster.
The confirmation of gravitational waves back in 2017 continues to unlock whole new worlds of physics but also
Author(s): Deep Chatterjee, Abhishek Hegade K. R., Gilbert Holder, Daniel E. Holz, Scott Perkins, Kent Yagi, and Nicolás YunesIn this paper, the authors introduce a new way to measure the Hubble constant purely from gravitational wave data, using the binary Love relations, which govern the tidal deformability of neutron stars in an EOS insensitive way. The authors use both real and synthetic data to implement their program and predict an improvement to less than 10 percent accuracy for data from third generation gravitational wave detectors. [Phys. Rev. D 104, 083528] Published Tue Oct 19, 2021
A theorist in astrophysics at The University of Texas at Arlington is leading a project to study the explosive phenomena of X-ray bursts in order to better understand neutron stars.
A new study showing how the explosion of a stripped massive star in a supernova can lead to the formation of a heavy neutron star or a light black hole resolves one of the most challenging puzzles to emerge from the detection of neutron star mergers by the gravitational wave observatories LIGO and Virgo.
What happens when you slam a neutron star (or black hole, take your pick) into a companion star?
There is nothing more extreme than black holes. But what is the second most violent thing in the
A model for supernova explosions first proposed in the 1980s has received strong support from the observation by RIKEN astrophysicists of titanium-rich plumes emanating from a remnant of such an explosion.
Scientists have used computer models to predict the size of minuscule deformations, or mountains, on the surfaces of neutron stars, which are responsible for causing gravitational waves as they spin.
A new analysis of neutron star physics predicts the "mountains" on the surface are less than a millimeter tall. The post New Study Predicts Teeny Tiny Mountains on Neutron Stars appeared first on ExtremeTech.
New models of neutron stars show that their tallest mountains may be only fractions of millimeters high, due to the huge gravity on the ultra-dense objects.
New models of neutron stars show that their tallest mountains may be only fractions of millimetres high, due to the huge gravity on the ultra-dense objects.
New models of neutron stars show that their tallest mountains may be only fractions of millimeters high, due to the huge gravity on the ultra-dense objects. The research is presented today at the National Astronomy Meeting 2021.
A long time ago, in two galaxies about 900 million light-years away, two black holes each gobbled up
For the first time, researchers have confirmed the detection of a collision between a black hole and a
One of the best things about being an astronomer is being able to discover something new about the universe. In fact, maybe the only thing better is discovering it twice. And that’s exactly what my colleagues and I have done, by making two separate observations, just ten days apart, of an entirely new type of […]
At long last, the definitive discovery completes a trifecta of astrophysical events that were forecast by gravitational-wave astronomers -- Read more on ScientificAmerican.com
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After more than four years of exploring a menagerie of cosmic happenings through gravitational waves, scientists have finally spotted the third expected variety of collision — twice.
A new phenomenon in the Universe has been revealed – the death spiral and merger of the two
For the first time, researchers have confirmed the detection of a collision between a black hole and a
The discovery will help researchers learn more about how some of the most extreme objects in the universe form and how common they are.
A long time ago, in two galaxies about 900 million light-years away, two black holes each gobbled up their neutron star companions, triggering gravitational waves that finally hit Earth in January 2020. Astrophysicists' observation of the two events -- detected just 10 days apart -- mark the first-ever detection of a black hole merging with a neutron star.
Astronomers have definitively detected a black hole devouring a neutron star for the first – and second – time. These cataclysmic events created ripples in space-time called gravitational waves that travelled more than 900 million light-years to reach detectors on Earth
Scientists spot the third of three general types of gravitational wave sirens
Astronomers had long suspected that collisions between black holes and dead stars occurred, but they had no evidence until a pair of recent detections.
Scientists have for the first time detected black holes eating neutron stars, 'like Pac Man', in a discovery documenting the collision of the two most extreme and enigmatic objects in the Universe.
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Separate collisions of a neutron star and a black hole are detected in a short space of time.
A long time ago, in two galaxies about 900 million light-years away, two black holes each gobbled up their neutron star companions, triggering gravitational waves that finally hit Earth in January 2020.
Astronomers had long looked for signs of such a merger, and now they’ve spotted two.
The matter inside neutron stars is less compressible than previously thought. A global collaboration, led by (among others)
Scientists get closer to detecting elusive continuous gravitational waves for the first time: A study finds new insights into these 'humming', slightly wobbly continuous gravitational waves generated from rapidly spinning neutron stars.
Groundbreaking results show that neutron stars of different masses may have the same size — upending astrophysical models. The post Squishy Neutron Star Setback Dampens Hopes of Exotic Matter first appeared on Quanta Magazine
Neutron stars, the remnant cores of stars that have gone supernova, are some of the densest objects in the universe, and their intense gravity means their surface differs in height by less than 0.1 millimetre
When a massive star dies, first there is a supernova explosion. Then, what's left over becomes either a black hole or a neutron star.
When a massive star dies, first there is a supernova explosion. Then, what’s leftover becomes either a black
Two neutron stars. One is 50% more massive than the other, yet they are almost exactly the same
Author(s): Daniela DonevaThe combination of gravitational-wave and x-ray observations of neutron stars provides new insight into the structure of these stars, as well as new confirmation of Einstein’s theory of gravity. [Physics 14, 66] Published Mon May 03, 2021
Author(s): Hector O. Silva, A. Miguel Holgado, Alejandro Cárdenas-Avendaño, and Nicolás YunesThe combination of gravitational-wave and x-ray observations of neutron stars provides new information on the mass distribution in these stars as well as new confirmation of Einstein’s theory of gravity. [Phys. Rev. Lett. 126, 181101] Published Mon May 03, 2021
Author(s): Matteo RiniA satellite experiment has revealed that the heaviest known neutron star is unexpectedly large, which suggests that the matter in the star’s inner core is less “squeezable” than some models predict. [Physics 14, 64] Published Thu Apr 29, 2021
A new study simulated 25,000 scenarios of black holes and neutron stars colliding, aiming to see how many would likely be detected by instruments on Earth in the mid- to late-2020s. The researchers found that, by 2030, instruments on Earth could sense ripples in space-time caused by up to 3,000 such collisions, and that for around 100 of these events, telescopes would also see accompanying explosions of light.
Studying the violent collisions of black holes and neutron stars may soon provide a new measurement of the Universe's expansion rate, helping to resolve a long-standing dispute, suggests a new simulation study led by researchers at UCL (University College London).
Nuclear physicists have made a new, highly accurate measurement of the thickness of the neutron 'skin' that encompasses the lead nucleus in experiments. The result, which revealed a neutron skin thickness of .28 millionths of a nanometer, has important implications for the structure and size of neutron stars.
Thick skin of neutrons on nucleus suggests nuclear matter is relatively stiff
Nuclear physicists have made a new, highly accurate measurement of the thickness of the neutron "skin" that encompasses the lead nucleus in experiments conducted at the U.S. Department of Energy's Thomas Jefferson National Accelerator Facility and just published in Physical Review Letters. The result, which revealed a neutron skin thickness of .28 millionths of a nanometer, has important implications for the structure and size of neutron stars.