Events Calendar
Microquasars and Relations
Thursday February 12, 2015
| 2:00 pm
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Presenter: | Vivek Dhawan, NRAO |
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| Series: | Center for Astrophysics Research and Technologies Seminar Series | |
| Abstract: |
Accretion power and nuclear fusion compete to illuminate the universe.
The central region of almost any galaxy harbors a black hole that shines in X-rays, depending on how much gas it is accreting. The thermal X-ray emission from a hot disk is often accompanied by jets of radio-emitting directed energy. This marriage persists over a range of 10^9 in the mass of the central object, with stars of ~1Mo at the low end. Since they are relatively close, bright, and rapidly evolving, the 'micro' analogs give 'laboratory quality' data that is unavailable for the distant giants. I will survey some data (a fraction of it is my contribution) on X-ray spectra & time variability, and VLBA radio imaging & astrometry, and try to tie these to wider themes in astrophysics. For example, how does VLBI astrometry help to decode stellar evolution? or measure black hole spin? |
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| Host: | Gregory Taylor | |
| Location: | PAIS-2540, PAIS | |
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