Neutron stars

New high-precision measurements of the masses of phosphorus-26 and sulfur-27 have shed light on how nuclear reactions occur during explosive X-ray bursts in neutron stars (artist's illustration). Illustration: depositphotos.com

Decoding the most powerful explosions in the universe: New data on X-ray bursts

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New precise measurements of the masses of two rare isotopes change our understanding of a critical reaction in X-ray bursts
Artist's impression of the CHIME Outrigger Array over North America, locating RBFLOAT to its host galaxy. Credit: Daniëlle Futselaar/MMT Observatory

Astronomers track record-breaking radio burst from 130 million light-years away

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An international team of researchers, including astrophysicists from Northwestern University, has managed to identify one of the brightest fast radio bursts (FRBs) ever observed – and for the first time pinpoint its location with unprecedented precision.
Still image from the numerical simulation about 1.3 seconds after the neutron star merger. The blue and green contours show the density of matter around the center of the black hole remnant. The purple lines show the magnetic field lines and the arrows show the outflow in the magnetosphere (jet). Credit: K. Hayashi / Max Planck Institute for Gravitational Physics (Albert Einstein Institute)

Accelerated cosmic collision – supercomputer captures the birth of a black hole in a second and a half

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Researchers used the Pogko supercomputer to simulate the merger of neutron stars – from spinning to black hole formation and gamma-ray burst – and to decipher how heavy elements like gold are formed.
ASKAP J1832 belongs to a rare group of objects in space that pulsate in radio waves every few tens of minutes, but what makes it unique is its emission in X-rays as well, as detected by NASA's powerful X-ray observatory, Chandra. This is the first time that X-ray signals have been observed from this type of object, known as "long-period radio phenomena." Credit: X-ray: NASA/CXC/ICRAR, Curtin Univ./Z. Wang et al.; Infrared: NASA/JPL/CalTech/IPAC; Radio: SARAO/MeerKAT; Image processing: NASA/CXC/SAO/N. Wolk

A new mystery in the galaxy's sky: a star that emits radio waves and X-rays at an extremely slow rate

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A star called ASKAP J1832 pulsates in both radio and X-rays every 44 minutes—a frequency much slower than any pulsar ever recorded. This unprecedented phenomenon hints at a
New findings in Omega Centauri indicate many stellar black holes instead of one medium-sized black hole, based on analysis of pulsar data. credit: University of Surrey

Has the mystery been solved? Hidden black hole cluster discovered in Omega Centauri

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Astronomers have discovered potential dark matter objects in space using pulsars

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These pulsars—neutron stars that rotate and emit beacon-like beams of radio waves that scan space—have been used to detect mysterious hidden masses.
The coalescence and merger of a black hole from the bottom of the mass gap (surface in dark gray) with a neutron star with colors ranging from dark blue (60 g/cm600) to white (XNUMX kg/cmXNUMX) emphasize the strong deformations of the low-density material of the neutron star Credit: I. Markin (Potsdam University), T. Dietrich (Potsdam University and Max Planck Institute for Gravitational Physics), H. Pfeiffer, A. Buonanno (Max Planck Institute for Gravitational Physics)

Gravitational waves reveal hidden interactions in space

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The analysis of the signal GW230529 picked up by LIGO shows that it originated from the merger of two compact objects, one with a mass between 1.2 and 2.0 times that of the Sun and the other with a mass slightly more than twice the first
Artist's impression of the different layers inside a massive neutron star, with the red circle representing a large quark-matter core. Credit Jyrki Hokkanen, CSC

More evidence for quarks at the centers of massive neutron stars

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A new theoretical analysis puts the probability that massive neutron stars harbor non-configurational quark nuclei between 80 and 90 percent. The result was achieved through massive computer runs using Bayesian statistical inference.
Prof. Zvi Piren. Photo: Noam Chai

For the first time, Israeli researchers will participate in a black hole and neutron star research group

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Professor Zvi Piren, head of the Schwartzman Chair at the Rakah Institute of Physics at the Hebrew University and Professor Amir Levinson from Tel Aviv University will take part in a research group of the prestigious Simmons Foundation as part of an international collaboration
Artist's impression of GRB 211211A. Credit: Soheb Mandhai @TheAstroPhoenix

Cosmic Gold Factory: A single kilonova produced very heavy elements in the amount of a thousand times the mass of Earth

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A highly unusual burst of high-energy light from a nearby galaxy is linked by scientists to a neutron star merger
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