Tag Archive for 'Black hole'

Quantum scrambling is one suggestion for how information can fall into a black hole and come out as random-looking radiation. Perhaps, the argument goes, it is not random at all, and black holes are just excellent scramblers. Image credit: E. Edwards / Joint Quantum Institute.

Hairy Black Holes Explain Hawking’s Paradox, Physicists Claim

Mar 22, 2022 by News Staff

The signature feature of black holes is that they are black — objects which fall into the hole can no longer be seen and can no longer influence...

This artist’s impression shows the evolution of the Universe beginning with the Big Bang on the left followed by the appearance of the Cosmic Microwave Background. The formation of the first stars ends the cosmic dark ages, followed by the formation of galaxies. Image credit: M. Weiss / Harvard-Smithsonian Center for Astrophysics.

Early Universe Experienced Phase Transition that Created Supermassive Black Holes, Study Suggests

Mar 15, 2022 by News Staff

The formation of ultrarare supermassive black holes, with masses over one billion solar masses, in the first billion years of the Universe is an open question...

Blázquez-Salcedo et al. constructed a specific example of a class of traversable wormholes in four space-time dimensions. Image credit: NASA / G. Bacon, STScI.

New Theoretical Study Sheds Light on How Information Escapes from Evaporating Black Hole

Mar 11, 2022 by News Staff

An international team of physicists from RIKEN, Cornell University and the University of California, Santa Barbara, has used a new spacetime geometry with...

An artist’s impression of HR 6819, a close binary consisting of a stripped B-type star (background) and a rapidly rotating Be star (foreground). Image credit: ESO / L. Calçada.

HR 6819 is Binary System with No Black Hole, Astronomers Say

Mar 4, 2022 by News Staff

HR 6819, a highly intriguing object that was recently proposed as a multiple system containing a stellar-mass black hole, is in fact a binary star system...

This images from the MUSE instrument on ESO’s Very Large Telescope shows the Seyfert 2 galaxy NGC 7582. Image credit: ESO / Juneau et al.

Galaxy Substructure Plays Important Role in How Active Black Holes Affect Their Galaxies: Study

Feb 9, 2022 by Enrico de Lazaro

Using images from the Multi Unit Spectroscopic Explorer (MUSE) instrument on ESO’s Very Large Telescope (VLT), astronomers have studied the effect of...

A pullout of the central region of the dwarf starburst galaxy Henize 2-10 traces an outflow, or bridge of hot gas 230 light-years long, connecting the galaxy’s massive black hole and a star-forming region. Hubble data on the velocity of the outflow from the black hole, as well as the age of the young stars, indicates a causal relationship between the two. A few million years ago, the outflow of hot gas slammed into the dense cloud of a stellar nursery and spread out, like water from a hose impacting a mound of dirt. Now clusters of young stars are aligned perpendicular to the outflow, revealing the path of its spread. Image credit: NASA / ESA / Zachary Schutte & Amy Reines, eXtreme Gravity Institute, Montana State University / Alyssa Pagan, STScI.

Supermassive Black Hole Triggered Star Formation in Dwarf Galaxy

Jan 20, 2022 by News Staff

Astronomers have observed the central regions of Henize 2-10, a dwarf starburst galaxy previously reported to have a central massive black hole, at optical...

An artist’s impression of a group of stellar-mass black holes in the center of NGC 6397. Image credit: NASA / ESA / Hubble / N. Bartmann.

Universe is Teeming with Quintillions of Stellar-Mass Black Holes

Jan 19, 2022 by Enrico de Lazaro

A team of astrophysicists from Italy and the United Kingdom has calculated that in the observable Universe, a sphere of diameter around 90 billion light-years,...

This X-ray image of the Milky Way’s center merges all Swift observations from 2006 through 2013; Sagittarius A* is at the center; low-energy (300 to 1,500 electron volts) X-rays appear red; green are medium-energy (1,500 to 3,000 eV); blue are high-energy (3,000 to 10,000 eV). Image credit: NASA / Swift / N. Degenaar.

Milky Way’s Supermassive Black Hole Flares Irregularly and Unpredictably, Astronomers Find

Jan 13, 2022 by News Staff

Sagittarius A*, the 4.3-million-solar-mass black hole at the center of our Milky Way Galaxy, is a strong source of radio, X-rays and gamma rays. It also...

This graphic shows X-rays that NASA’s Chandra X-ray Observatory detected from the dwarf galaxy Mrk 462. This X-ray emission (inset) is important because it reveals the presence of a growing supermassive black hole within this relatively small galaxy. The mass contained in this black hole -- about 200,000 times the mass of the Sun -- provides information to astronomers about how some of the earliest black holes in the Universe may have formed and grown billions of years ago. The background panel is an optical image from the Pan-STARRS telescope in Hawaii. There are several galaxies that are part of the HCG068 galaxy group on the left-hand side of the image. The galaxy that is emitting copious amounts of X-rays, however, is the much smaller galaxy located to the lower right of the image (marked by the arrow). Image credit: NASA / CXC / Dartmouth College / J. Parker & R. Hickox / Pan-STARRS.

Chandra Detects Mini-Supermassive Black Hole in Star-Forming Dwarf Galaxy

Jan 11, 2022 by News Staff

A supermassive black hole with 200,000 solar masses is located in the middle of the dwarf galaxy Markarian 462 (Mrk 462), according to new research led...

An artist’s rendition of a giant star in orbit around a low-mass black hole. Image credit: Sci-News.com.

Black Holes are Giant Fuzzballs, Theoretical Physicists Say

Jan 5, 2022 by News Staff

In 1997, cosmologists Stephen Hawking, Kip Thorne and John Preskill made a famous bet as to whether information that enters a black hole ceases to exist....

Four enormous cavities have been found at the center of the RBS 797 galaxy cluster using Chandra. Image credit: NASA / CXC / University of Bologna / F. Ubertosi / STScl / M. Calzadilla / NSF / NRAO / ALMA.

Chandra Spots Four Cavities in Center of Galaxy Cluster

Dec 29, 2021 by News Staff

Astronomers using NASA’s Chandra X-ray Observatory have found a quartet of pronounced X-ray cavities in RBS 797, a cluster of galaxies located about...

This MWA image shows Centaurus A at radio wavelengths, revealing vast lobes of plasma that reach far beyond the visible galaxy, which occupies only a small patch at the center of the image. The dots in the background are not stars, but radio galaxies much like Centaurus A, at far greater distances. Image credit: Ben McKinley, ICRAR & Curtin University / Connor Matherne, Louisiana State University.

Radio Astronomers Spot Bipolar Outflow from Centaurus A’s Supermassive Black Hole

Dec 23, 2021 by News Staff

Centaurus A (NGC 5128) is a giant elliptical galaxy 12 million light-years away in the constellation of Centaurus. In its center lies an actively feeding...

In this illustration of the center of the Milky Way, stars are seen to be in close orbit around Sagittarius A*. Image credit: Gemini Observatory / NOIRLab / NSF / AURA / J. da Silva, Spaceengine / M. Zamani, NOIRLab.

Astrophysicists Make Most Precise Measurement Yet of Milky Way’s Central Black Hole Mass

Dec 15, 2021 by News Staff

Sagittarius A*, supermassive black hole at the center of our Milky Way Galaxy, has a mass of 4.3 million times that of the Sun, according to an analysis...

This is a composite view of X-rays, molecular gas, and warm ionized gas near the Milky Way’s center (yellow represents Hubble data, blue is Chandra data, green is ALMA data, and red is VLA data). The orange-colored features are of glowing hydrogen gas. One such feature, at the top tip of the jet is interpreted as a hydrogen cloud that has been hit by the outflowing jet. The jet scatters off the cloud into tendrils that flow northward. Farther down near the black hole are X-ray observations of superheated gas colored blue and molecular gas in green. These data are evidence that the black hole occasionally accretes stars or gas clouds, and ejects some of the superheated material along its spin axis. The graphic of a translucent, vertical white fan is added to show the suggested axis of a mini-jet from the supermassive black hole at the Galaxy’s heart. Image credit: NASA / ESA / Gerald Cecil, University of North Carolina / Joseph DePasquale, STScI.

Astronomers Spot Nuclear Jet near Milky Way’s Supermassive Black Hole

Dec 10, 2021 by News Staff

Astronomers have uncovered evidence that Sagittarius A*, the 4-million-solar-mass black hole at the center of our Milky Way Galaxy, is not a sleeping monster...

VLA image of the Messier 87 radio jet, made at multiple radio frequencies. The jet seen in this image is about 8,000 light-years long. This image clearly shows the corkscrew-like helical structure in the inner part of the jet, which originates at the bright spot at the left, at the core of the galaxy, where a supermassive black hole resides. Image credit: Sophia Dagnello / NRAO / AUI / NSF / Pasetto et al., doi: 10.3847/2041-8213/ac3a88.

Astronomers Spot Double-Helix Structure in Messier 87

Dec 8, 2021 by News Staff

Astronomers using NSF’s Karl G. Jansky Very Large Array have captured unprecedented high-fidelity radio images of a jet of material propelled from the...

The dwarf spheroidal galaxy Leo I is 30 times smaller than the Milky Way Galaxy. Image credit: ESA / Gaia / DPAC / SDSS.

Dwarf Galaxy Leo I Hosts Strangely Massive Black Hole, Astronomers Say

Dec 2, 2021 by News Staff

A black hole in the center of a dwarf spheroidal galaxy called Leo I is almost as massive as the central black hole of our own Milky Way Galaxy. The dwarf...

Photons emitted near rotating black holes encode quantum information that can be measured by actual quantum information technology. Image credit: Sci-News.com.

Astrophysicists Search for Gravitational-Wave Signals from Ultralight Boson Clouds

Dec 1, 2021 by News Staff

Theories of beyond Standard Model physics allow for the production of ultralight bosons — hypothetical particles with masses less than a billionth...

This image, taken with the MUSE instrument on ESO’s Very Large Telescope, shows two bright galactic nuclei, each housing a supermassive black hole, in NGC 7727. Image credit: ESO / Voggel et al.

Astronomers Find Two Supermassive Black Holes in NGC 7727

Dec 1, 2021 by Enrico de Lazaro

The supermassive black hole pair, located in the peculiar galaxy NGC 7727, is about 89 million light-years away from Earth, making it the record holder...

This artist’s impression shows NGC 1850 BH1 and a massive star orbiting it. The distortion of the star’s shape is due to the strong gravitational force exerted by the black hole. Image credit: M. Kornmesser / ESO.

Astronomers Detect Stellar-Mass Black Hole in Large Magellanic Cloud

Nov 12, 2021 by Natali Anderson

Astronomers using the Multi Unit Spectroscopic Explorer (MUSE) instrument on ESO’s Very Large Telescope have discovered a low-mass black hole in the...

Graphical table of all gravitational wave events discovered from 2015 through the end of LIGO/Virgo’s third observing run. The table includes the gravitational event name, the type of binary component (black hole, neutron star, or uncertain), the masses of the primary and secondary, and the mass of the final merged object. Image credit: LIGO / Virgo / KAGRA / C. Knox / H. Middleton.

Astrophysicists Detect 35 New Gravitational-Wave Events

Nov 10, 2021 by News Staff

Astrophysicists from the LIGO-Virgo-KAGRA Collaboration have detected a further 35 gravitational waves since the last catalog release in October 2020,...

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