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 Innovative LED High Power Light Source for UV
22.06.2017 | Omicron - Laserage Laserprodukte GmbH

nachricht Spin liquids − back to the roots
22.06.2017 | Universität Augsburg

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: Climate satellite: Tracking methane with robust laser technology

Heatwaves in the Arctic, longer periods of vegetation in Europe, severe floods in West Africa – starting in 2021, scientists want to explore the emissions of the greenhouse gas methane with the German-French satellite MERLIN. This is made possible by a new robust laser system of the Fraunhofer Institute for Laser Technology ILT in Aachen, which achieves unprecedented measurement accuracy.

Methane is primarily the result of the decomposition of organic matter. The gas has a 25 times greater warming potential than carbon dioxide, but is not as...

Im Focus: How protons move through a fuel cell

Hydrogen is regarded as the energy source of the future: It is produced with solar power and can be used to generate heat and electricity in fuel cells. Empa researchers have now succeeded in decoding the movement of hydrogen ions in crystals – a key step towards more efficient energy conversion in the hydrogen industry of tomorrow.

As charge carriers, electrons and ions play the leading role in electrochemical energy storage devices and converters such as batteries and fuel cells. Proton...

Im Focus: A unique data centre for cosmological simulations

Scientists from the Excellence Cluster Universe at the Ludwig-Maximilians-Universität Munich have establised "Cosmowebportal", a unique data centre for cosmological simulations located at the Leibniz Supercomputing Centre (LRZ) of the Bavarian Academy of Sciences. The complete results of a series of large hydrodynamical cosmological simulations are available, with data volumes typically exceeding several hundred terabytes. Scientists worldwide can interactively explore these complex simulations via a web interface and directly access the results.

With current telescopes, scientists can observe our Universe’s galaxies and galaxy clusters and their distribution along an invisible cosmic web. From the...

Im Focus: Scientists develop molecular thermometer for contactless measurement using infrared light

Temperature measurements possible even on the smallest scale / Molecular ruby for use in material sciences, biology, and medicine

Chemists at Johannes Gutenberg University Mainz (JGU) in cooperation with researchers of the German Federal Institute for Materials Research and Testing (BAM)...

Im Focus: Optoelectronic Inline Measurement – Accurate to the Nanometer

Germany counts high-precision manufacturing processes among its advantages as a location. It’s not just the aerospace and automotive industries that require almost waste-free, high-precision manufacturing to provide an efficient way of testing the shape and orientation tolerances of products. Since current inline measurement technology not yet provides the required accuracy, the Fraunhofer Institute for Laser Technology ILT is collaborating with four renowned industry partners in the INSPIRE project to develop inline sensors with a new accuracy class. Funded by the German Federal Ministry of Education and Research (BMBF), the project is scheduled to run until the end of 2019.

New Manufacturing Technologies for New Products

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Plants are networkers

19.06.2017 | Event News

Digital Survival Training for Executives

13.06.2017 | Event News

Global Learning Council Summit 2017

13.06.2017 | Event News

 
Latest News

A new technique isolates neuronal activity during memory consolidation

22.06.2017 | Life Sciences

Plant inspiration could lead to flexible electronics

22.06.2017 | Materials Sciences

A rhodium-based catalyst for making organosilicon using less precious metal

22.06.2017 | Materials Sciences

VideoLinks
B2B-VideoLinks
More VideoLinks >>>