Black Holes

An image of the spiral galaxy NGC 1086 obtained by the European Southern Observatory’s Very Large Telescope (VLT)

Jan. 17, 2025

U of A astronomers capture unprecedented view of supermassive black hole in action

U of A astronomers have now produced the highest resolution direct images ever taken of a supermassive black hole in the infrared.

Illustration of a massive star collapsing and sending a jet into space, which is seen as a gamma ray burst

March 28, 2023

Astronomers race to make sense of brightest gamma ray burst ever seen

UArizona astronomers have joined an international effort to study the aftermath of the brightest flash of gamma rays ever observed. Observations involving UArizona telescopes and instruments provide astronomers with a "cosmic lab" to study how massive stars die.

Illustration showing a collage of different simulated black holes and a large galaxy

Dec. 14, 2022

Machine learning reveals how black holes grow

Black holes are surrounded by an invisible layer that swallows every bit of evidence about their past. Researchers are now using machine learning and supercomputers to reconstruct the growth histories of black holes.

Image of Sagittarius A* (or Sgr A* for short), the first direct visual evidence of the supermassive black hole at the center of our galaxy.

May 12, 2022

UArizona astronomers lead efforts that reveal the black hole at the heart of our galaxy

After years of anticipation, the international Event Horizon Telescope Collaboration presented the first image of the black hole located at the center of our own Milky Way galaxy, called Sagittarius A*. Scientists had previously suggested the presence of a black hole at this location, but there was no direct visual evidence until now.

May 12, 2022

Making sense of the nonsensical: Black holes and the simulation library

Snapping an image of a black hole is just the beginning, says researcher Chi-Kwan "CK" Chan. To really understand the image, it must be compared with black hole simulations. UArizona worked with partners to create the world's largest simulation library.

May 12, 2022

Black hole scientist: 'Wherever we look, we should see donuts'

UArizona astrophysicists Feryal Özel and Dimitrios Psaltis identified Sagittarius A* as an ideal target black hole more than 20 years ago. They call it a "Goldilocks black hole," with an environment "just right" for capturing an image.

Jets emerging from a black hole at the center of Centaurus A

July 19, 2021

Event Horizon Telescope Pinpoints Heart of the Nearest Radio Galaxy

Researchers used detailed observations of an enormous jet of glowing gas and dust to pinpoint the supermassive black hole at the center of galaxy Centaurus A.

March 24, 2021

Astronomers Image Magnetic Fields at the Edge of M87's Black Hole

A new image taken with the globe-spanning Event Horizon Telescope array reveals the black hole at the center of the M87 galaxy and its shadow in polarized light. The EHT network of telescopes includes the UArizona ARO Submillimeter Telescope on Mt. Graham in Arizona.

Oct. 1, 2020

Einstein's Description of Gravity Just Got Much Harder to Beat

Einstein's theory of general relativity has withstood over 100 years of scrutiny and testing, including the newest test from the Event Horizon Telescope collaboration, led by UArizona astrophysicists.

Oct. 15, 2019

Astronomer Receives Packard Fellowship to Pursue Black Hole Research

Astronomy Prof Peter Behroozi was awarded a Packard Fellowship to get to the bottom of a long-standing mystery: How could supermassive black holes grow so big so quickly after the Big Bang?

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