Abstract Details
| Name: T MAGESHWARAN Affiliation: INDIAN INSTITUTE OF ASTROPHYSICS Conference ID: ASI2015_804 Title : Stellar dynamics around BHs and it observational implications for quiescent galaxies Authors and Co-Authors : ARUN MANGALAM and INDIAN INSTITUTE OF ASTROPHYSICS, BANGALORE Abstract Type : Oral Abstract Category : Extragalactic astronomy Abstract : Stars close to the galactic center moves in the potential field of both Supermassive Black Hole (SMBH) and other stars in the galaxy. The SMBH influences the orbital and spatial distribution of stars in the inner region of its host galaxy which together determine the ingestion rate of stars. It has been also well established by observations that SMBH of $10^6$-$10^8$ $M_{\odot}$ capture stellar debris from tidally disrupted stars that result in X-Ray, UV and Optical flashes. A star whose orbit's pericenter lies within the radius $\displaystyle{R_{t}\sim R_{\star} (M_{\bullet}/ M_{\star})^{1/3}}$ is tidally disrupted by SMBH. The pericenter radius of star's orbit depends on both energy and angular momentum of the orbit. Broadly, the mass infall rate after disruption follow $t^{-5/3}$ law, the details of which depend on the nature of accretion between tidal radius and horizon of SMBH and also on the structure and properties of the star. We simulated the light curve profiles in different spectral bands with a gas dynamical model to make theoretical predictions for the rate of detections of such events by various missions performing in either all sky survey (ASS) mode or deep imaging survey (DIS) mode. |