Astronomy and Astrophysics – Astrophysics
Scientific paper
2008-08-21
Astronomy and Astrophysics
Astrophysics
Proceedings of the AHAR 2008 Conference: The Universe under the Microscope; Astrophysics at High Angular Resolution, Bad Honef
Scientific paper
10.1088/1742-6596/131/1/012001
Sgr A* is the closest massive black hole and can be observed with the highest angular resolution. Nevertheless, our current understanding of the accretion process in this source is very poor. The inflow is almost certainly of low radiative efficiency and it is accompanied by a strong outflow and the flow is strongly variable but the details of the dynamics are unknown. Even the amount of angular momentum in the flow is an open question. Here we argue that low angular momentum scenario is better suited to explain the flow variability. We present a new hybrid model which describes such a flow and consists of an outer spherically symmetric Bondi flow and an inner axially symmetric flow described through MHD simulations. The assumed angular momentum of the matter is low, i.e. the corresponding circularization radius in the equatorial plane of the flow is just above the innermost stable circular orbit in pseudo-Newtonian potential. We compare the radiation spectrum from such a flow to the broad band observational data for Sgr A*.
Czerny Bozena
Moscibrodzka Monika
No associations
LandOfFree
Low angular momentum flow model of Sgr A* activity 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 Low angular momentum flow model of Sgr A* activity, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Low angular momentum flow model of Sgr A* activity will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-219456