Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995pkas...10...79y&link_type=abstract
Publications of the Korean Astronomical Society, vol.10, no.1, p.79-90
Astronomy and Astrophysics
Astronomy
2
Scientific paper
The unique compact radio source, Sgr A, at the Galactic center show many observational signs that it is powered by supermassive black hole. Recent observations also imply that it is surrounded by winds from nearby IR sources. So we explore the model in which multiwavelength spectrum from Sgr A is due to the spherical accretion of these winds onto the central supermassive black hole. Improving upon the previous work, we allowed the possibility that ions and electrons have different temperatures, included the Compton effects and pair processes. Electrons radiate via cyclosynchrotron and bremsstrahlung with comptonization. We find that ion approaches the virial temperature ~1e13K while electron temperature saturates at ~1e10K. However, decoupling between ion and electron does not greatly affect the shape of the emission spectrum. When the mass of the black hole is ~1e6 Mo, radio, IR, X-ray, gamma-ray band spectrum is reasonably explained by the model. Yet Compton effect which is neglected in previous works produces significant emission in IR band, which is marginally compatible with observations. Pair production is negligible and annihilation lines cannot be observed.
Park Myeong-Gu
Yim Soo Youn
No associations
LandOfFree
Spherical Wind Accretion onto Supermassive Black Hole does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Spherical Wind Accretion onto Supermassive Black Hole, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Spherical Wind Accretion onto Supermassive Black Hole will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1563640