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 Tune your radio: galaxies sing while forming stars
21.02.2017 | Max-Planck-Institut für Radioastronomie

nachricht Breakthrough with a chain of gold atoms
17.02.2017 | Universität Konstanz

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: Breakthrough with a chain of gold atoms

In the field of nanoscience, an international team of physicists with participants from Konstanz has achieved a breakthrough in understanding heat transport

In the field of nanoscience, an international team of physicists with participants from Konstanz has achieved a breakthrough in understanding heat transport

Im Focus: DNA repair: a new letter in the cell alphabet

Results reveal how discoveries may be hidden in scientific “blind spots”

Cells need to repair damaged DNA in our genes to prevent the development of cancer and other diseases. Our cells therefore activate and send “repair-proteins”...

Im Focus: Dresdner scientists print tomorrow’s world

The Fraunhofer IWS Dresden and Technische Universität Dresden inaugurated their jointly operated Center for Additive Manufacturing Dresden (AMCD) with a festive ceremony on February 7, 2017. Scientists from various disciplines perform research on materials, additive manufacturing processes and innovative technologies, which build up components in a layer by layer process. This technology opens up new horizons for component design and combinations of functions. For example during fabrication, electrical conductors and sensors are already able to be additively manufactured into components. They provide information about stress conditions of a product during operation.

The 3D-printing technology, or additive manufacturing as it is often called, has long made the step out of scientific research laboratories into industrial...

Im Focus: Mimicking nature's cellular architectures via 3-D printing

Research offers new level of control over the structure of 3-D printed materials

Nature does amazing things with limited design materials. Grass, for example, can support its own weight, resist strong wind loads, and recover after being...

Im Focus: Three Magnetic States for Each Hole

Nanometer-scale magnetic perforated grids could create new possibilities for computing. Together with international colleagues, scientists from the Helmholtz Zentrum Dresden-Rossendorf (HZDR) have shown how a cobalt grid can be reliably programmed at room temperature. In addition they discovered that for every hole ("antidot") three magnetic states can be configured. The results have been published in the journal "Scientific Reports".

Physicist Dr. Rantej Bali from the HZDR, together with scientists from Singapore and Australia, designed a special grid structure in a thin layer of cobalt in...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Booth and panel discussion – The Lindau Nobel Laureate Meetings at the AAAS 2017 Annual Meeting

13.02.2017 | Event News

Complex Loading versus Hidden Reserves

10.02.2017 | Event News

International Conference on Crystal Growth in Freiburg

09.02.2017 | Event News

 
Latest News

Impacts of mass coral die-off on Indian Ocean reefs revealed

21.02.2017 | Earth Sciences

Novel breast tomosynthesis technique reduces screening recall rate

21.02.2017 | Medical Engineering

Use your Voice – and Smart Homes will “LISTEN”

21.02.2017 | Trade Fair News

VideoLinks
B2B-VideoLinks
More VideoLinks >>>