Seminar
Ultraluminous Supersoft X-ray sources as super-critical accretion onto stellar black holes
Resumen
While ultraluminous supersoft X-ray sources (ULSs) bear features for intermediate mass black holes or very massive white dwarfs possibly close to Chandrasekhar mass limit, our recent discovery of processing relativistic baryonic jets from a prototype ULS in M81 demonstrate that they are not IMBHs or WDs, but black holes accreting at super-Eddington rates. This discovery strengthens the recent ideas that ULXs are stellar black holes with supercritical accretion, as demonstrated in the case of M101 ULX-1, and provides a vivid manifestation of what happens when a black hole devours too much, that is, it will generate thick disk winds and fire out sub-relativistic baryonic jets along the funnel as predicted by recent numerical simulations.
Sobre la charla
National Astronomical Observatories of the Chinese Academy of Sciences
iCalendar Google Calendar
Sobre el conferenciante
Prof. Jifeng Liu obtained his B.A degree from Beijing University and his Ph.D. degree from University of Michigan, and went on to Harvard University as a postdoc. He was a Chandra fellow (renamed Einstein fellow now) between 2006 and 2009, and became an astrophysicist at Harvard afterward. Jifeng is now based in Beijing as a Principal astronomer at National Astronomical Observatories of China, and as a chair professor at School of Astronomy and Space Sciences at University of Chinese Academy of Sciences, with research interests mainly in multi-wavelength observations of compact objects in the Milky Way and nearby galaxies.