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NASA's Spitzer Space Telescope captures galaxy NGC 4395 in infrared light. NGC 4395 is about 1,000 times smaller than the Milky Way, and a team of astronomers including U-M's Elena Gallo has determined the mass of the black hole at its center. CREDIT NASA

Astronomers determined the mass of surprisingly tiny black hole

The motions of gas and stars in the nuclei of nearby galaxies have demonstrated that massive black holes are common and that their masses...
This image shows how the inner region of the accretion disk (red) aligns with the equatorial plane of the black hole. The outer disk is tilted away. The inner disk (where the black curve dips) is horizontal, signaling the long-sought Bardeen-Petterson alignment. Credit: Sasha Tchekhovskoy/Northwestern University; Matthew Liska/University of Amsterdam

40 year black hole mystery solved with most detailed simulation ever

Using a custom built code and a supercomputer, an international team of scientists has created the most detailed, highest resolution simulation of a black...
Modelling black holes in the laboratory. a, An astrophysical black hole is characterized by an extremely warped region of space-time. In the 1970s, Stephen Hawking studied1 what happens when a pair of particles is produced from the vacuum of space near a black hole’s event horizon — the boundary beyond which nothing can escape. He found that one of the particles would be absorbed by the black hole, and the other would be emitted into space in the form of thermal radiation, which is now called Hawking radiation. b, de Nova et al.3 report observations of an analogue black hole, which is based on a flowing fluid of ultracold atoms. One region of the fluid travels at a supersonic speed and a connected region travels at a subsonic speed; sizes of grey arrows indicate speed. The boundary between these regions provides an analogue black-hole event horizon. When a pair of sound waves is produced near this boundary, one of the waves is absorbed into the supersonic region, and the other is emitted away from the region in the form of Hawking radiation.

In an experiment, scientists made an analogue black hole that traps sound

The entropy of a black hole and Hawking radiation should have the same temperature given by the surface gravity, within a numerical factor of...
Imaging black hole like listening to broken piano, says scientist

Imaging black hole like listening to broken piano, says scientist

On 10th April 2019 astronomers released the first-ever image of a black hole. Later on, another photo of a 29-year-old female US Computer Scientist...
Credit: SRON Netherlands Institute for Space Research

Jets and winds from galaxy cores appear to share a common cause

Fundamental considerations of the energy supply in large-scale extragalactic radio sources("radio galaxies") led astronomers to predict that these sources should contain jets or beams...
In space, the EHI has a resolution more than five times that of the EHT on earth, and images can be reconstructed with higher fidelity. Top left: Model of Sagittarius A* at an observation frequency of 230 GHz. Top left: Simulation of an image of this model with the EHT. Bottom left: Model of Sagittarius A* at an observation frequency of 690 GHz. Bottom right: Simulation of an image of this model with the EHI.

Telescopes in space for even sharper images of black holes

Recently, the Event Horizon Telescope has released the first direct image of a black hole and its neighborhood. Now, astronomers have the challenge of...
LIGO and Virgo team members estimate that the candidate gravitational signal referred to as S190425z originated from the region outlined on the sky map. The signal likely came from two colliding neutron stars. Because only LIGO Livingston and Virgo saw the signal (LIGO Hanford was offline at the time), its localization was not very precise, covering about 18 percent of the sky. Image: LIGO/Virgo/NASA/Leo Singer (Milky Way image: Axel Mellinger)

Physicists have detected first-ever collision of black hole and neutron star

The National Science Foundation's Laser Interferometer Gravitational-Wave Observatory (LIGO) and the European-based Virgo detector recently detected the first ever observed merger between a black...
Scientific simulation of a black hole consuming a neutron star.Credit: A. Tonita, L. Rezzolla, F. Pannarale

Gravitational waves hint at detection of black hole eating star

Gravitational waves may have just delivered the first sighting of a black hole devouring a neutron star. If confirmed, it would be the first...
First image of a black hole, using Event Horizon Telescope observations of the center of the galaxy M87. Credit: Event Horizon Telescope Collaboration

Everything you wanted to know about the first ever image of a black hole

The Event Horizon Telescope has released the first direct image of a black hole and its neighbourhood. This black hole lurks in the centre...

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