2009A&A...502..419Z


C.D.S. - SIMBAD4 rel 1.7 - 2021.03.09CET09:48:03

2009A&A...502..419Z - Astronomy and Astrophysics, volume 502, 419-422 (2009/8-1)

Is the energy generation rate of nuclear reactions in hot accretion flows important?

ZHANG H., WANG Y., YUAN F., DING F., LUO X. and PENG Q.H.

Abstract (from CDS):

The temperature of hot accretion flows around black holes is sufficiently high for the ignition of nuclear reactions. This is potentially an important nucleosynthesis mechanism in the universe. As the first step in studying this problem, we need to measure physical quantities such as density and temperature of the accretion flow. In usual studies of the hot accretion flow, viscous dissipation is considered to be the only heating mechanism, while the heating caused by nuclear reactions is not considered. In this paper, we investigate whether the energy generation rate of nuclear reaction is important compared to the viscous heating. Our calculation indicates that the former is at most one percent of the latter and thus is not important. The dynamics of accretion flow can be therefore calculated in the usual way, without the need to consider heating due to nuclear reactions.

Abstract Copyright:

Journal keyword(s): accretion, accretion disks - black hole physics - nuclear reactions, nucleosynthesis, abundances

Simbad objects: 2

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Number of rows : 2

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 GAL 000.0+00.0 gam 17 45 39.60213 -29 00 22.0000           ~ 12015 0
2 NAME Sgr A* X 17 45 40.03599 -29 00 28.1699           ~ 3601 3

    Equat.    Gal    SGal    Ecl

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