UNSPECIFIED (2001) Component thermalization time-scale estimate for the advection dominated accretion flow around Sgr A. NEW ASTRONOMY, 6 (8). pp. 487-491. ISSN 1384-1092

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Abstract

We report here on a calculation of thermalization time-scale of the two temperature advection dominated accretion flow (ADAF) model. It is established that time required to equalize the electron and ion temperatures via electron-ion collisions in the ADAF with plausible physical parameters greatly exceeds the accretion time, which corroborates validity one of the crucial assumptions of the ADAF model, namely the existence of a hot two temperature plasma. This work is motivated by the recent success of the ADAF model [Nature 394 (1998) 651; MNRAS 304 (1999) 501] in explaining the emitted spectrum of Sgr A*, and it is complementary to the similar analysis of Mahadevan and Quataert [ApJ 490 (1997) 605]. (C) 2001 Published by Elsevier Science B.V.

Item Type:	Journal Article
Subjects:	Q Science > QB Astronomy
Journal or Publication Title:	NEW ASTRONOMY
Publisher:	ELSEVIER SCIENCE BV
ISSN:	1384-1092
Date:	September 2001
Volume:	6
Number:	8
Number of Pages:	5
Page Range:	pp. 487-491
Publication Status:	Published
URI:	http://wrap.warwick.ac.uk/id/eprint/11663

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