Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

TAU Scientists Help Discover the Most Massive Stellar Black Hole Ever Found

13.11.2007
Sixteen times the mass of our sun, the discovery is expected to serve as a test-bed for studying astrophysics

An international team, including astronomers from Tel Aviv University, has uncovered the most massive stellar black hole found to date in a binary system.

Published in the prestigious journal Nature this week, the research was conducted by an international team including Professor Tsevi Mazeh, who is the director of the Sackler Institute of Astronomy at Tel Aviv University and holds the Oren Family Chair of Experimental Physics, and his Ph.D. student Avi Shporer.

The newly-discovered black hole is about 16 times the mass of our sun and located three million light-years away in a distant galaxy called Messier 33. The finding is unique because the black hole, named M33 X-7, is associated with an unusually large companion star (its binary pair), with a mass about 70 times the mass of our sun. The two objects move one around the other in space once every 3.5 days in an everlasting dance.

A stellar black hole is formed from the collapse of the core of a massive star at the end of its life. The collapse creates an intense gravitational force, where not even rays of light can escape its gravitational pull, rendering the phenomenon invisible. Matter transferred from the companion star into the black hole falls into the hole’s gravitational attraction and emits X-ray radiation that the astronomers have detected by using special satellites.

"Giant telescopes and satellites make it possible for us to discover in space systems that seem to come from a science-fiction film," says Prof. Mazeh. "We are able to study black holes whose existence we were able to imagine only thanks to Einstein's General Theory of Relativity."

This new discovery raises all sorts of questions about how massive black holes are formed. Prof. Mazeh says that these questions illustrate the enormous scale of the universe and the smallness of the Earth within it. "I hope these discoveries will lead scientists and even human society to a degree of modesty," he noted.

The scientific community has known about black holes orbiting companion stars for 40 years. "This discovery raises doubts about theories of how black holes, like this one, are created," said Prof. Jerome Orosz from San Diego State University, the first contributor of the article. Prof. Orosz led the international teams that analyzed data collected by the Chandra X-ray satellite and the Gemini telescope in Hawaii.

Concludes Prof. Mazeh, "Astronomical measurements allow us to peek into the vastness of space and discover epic events incomparable with anything which takes place on earth."

George Hunka | EurekAlert!
Further information:
http://www.tau.ac.il
http://www.aftau.org

More articles from Physics and Astronomy:

nachricht Space radiation won't stop NASA's human exploration
18.10.2017 | NASA/Johnson Space Center

nachricht Study shows how water could have flowed on 'cold and icy' ancient Mars
18.10.2017 | Brown University

All articles from Physics and Astronomy >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Neutron star merger directly observed for the first time

University of Maryland researchers contribute to historic detection of gravitational waves and light created by event

On August 17, 2017, at 12:41:04 UTC, scientists made the first direct observation of a merger between two neutron stars--the dense, collapsed cores that remain...

Im Focus: Breaking: the first light from two neutron stars merging

Seven new papers describe the first-ever detection of light from a gravitational wave source. The event, caused by two neutron stars colliding and merging together, was dubbed GW170817 because it sent ripples through space-time that reached Earth on 2017 August 17. Around the world, hundreds of excited astronomers mobilized quickly and were able to observe the event using numerous telescopes, providing a wealth of new data.

Previous detections of gravitational waves have all involved the merger of two black holes, a feat that won the 2017 Nobel Prize in Physics earlier this month....

Im Focus: Smart sensors for efficient processes

Material defects in end products can quickly result in failures in many areas of industry, and have a massive impact on the safe use of their products. This is why, in the field of quality assurance, intelligent, nondestructive sensor systems play a key role. They allow testing components and parts in a rapid and cost-efficient manner without destroying the actual product or changing its surface. Experts from the Fraunhofer IZFP in Saarbrücken will be presenting two exhibits at the Blechexpo in Stuttgart from 7–10 November 2017 that allow fast, reliable, and automated characterization of materials and detection of defects (Hall 5, Booth 5306).

When quality testing uses time-consuming destructive test methods, it can result in enormous costs due to damaging or destroying the products. And given that...

Im Focus: Cold molecules on collision course

Using a new cooling technique MPQ scientists succeed at observing collisions in a dense beam of cold and slow dipolar molecules.

How do chemical reactions proceed at extremely low temperatures? The answer requires the investigation of molecular samples that are cold, dense, and slow at...

Im Focus: Shrinking the proton again!

Scientists from the Max Planck Institute of Quantum Optics, using high precision laser spectroscopy of atomic hydrogen, confirm the surprisingly small value of the proton radius determined from muonic hydrogen.

It was one of the breakthroughs of the year 2010: Laser spectroscopy of muonic hydrogen resulted in a value for the proton charge radius that was significantly...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

ASEAN Member States discuss the future role of renewable energy

17.10.2017 | Event News

World Health Summit 2017: International experts set the course for the future of Global Health

10.10.2017 | Event News

Climate Engineering Conference 2017 Opens in Berlin

10.10.2017 | Event News

 
Latest News

Osaka university researchers make the slipperiest surfaces adhesive

18.10.2017 | Materials Sciences

Space radiation won't stop NASA's human exploration

18.10.2017 | Physics and Astronomy

Los Alamos researchers and supercomputers help interpret the latest LIGO findings

18.10.2017 | Physics and Astronomy

VideoLinks
B2B-VideoLinks
More VideoLinks >>>