Other
Scientific paper
Jan 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21730302s&link_type=abstract
American Astronomical Society, AAS Meeting #217, #303.02; Bulletin of the American Astronomical Society, Vol. 43, 2011
Other
1
Scientific paper
I will review a series of projects aimed at understanding the accretion onto the Galactic Center BH completed over the course of my PhD. First, the question of very low accretion rate onto Sgr A* was resolved. The initial guess that the accretion is inhibited by magnetic fields was dismissed, since the magnetized flow was found to achieve 10-100% of spherical Bondi accretion rate. Subsequently, conduction appeared to effectively transfer energy from near the BH to outer radii stopping the inflow down to 1% of Bondi rate. The conduction model with realistic feeding from stellar winds reconciled the theory and X-ray observations of surface brightness profile within 5'’ from Sgr A*. The discovered state of the outer flow served as a boundary condition for the inner flow modeling. The unrivaled combination of cutting-edge 3D GRMHD simulations and the original GR polarized radiative transfer code was employed to reach close to the BH horizon. The best fit to sub-millimeter spectrum and known linear and circular polarization fractions has BH spin 0.9, inclination 59deg, accretion rate 1.3*10-8Msun/yr. To accurately compute the circular polarization the corrected expressions were derived for Faraday conversion measure. Contrary to the previous theory it happened to diminish for both small and large particle energies, peaking at intermediate energies En several*me for observed frequencies. The performed research has far-reaching implications on dynamical and radiative modeling of other LLAGNs and jets. The work is partially supported by NESSF.
No associations
LandOfFree
Dynamical and Radiative Modeling of Sgr A* 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 Dynamical and Radiative Modeling of Sgr A*, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dynamical and Radiative Modeling of Sgr A* will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1400640