Component thermalization time-scale estimate for the advection dominated accretion flow around Sgr A
UNSPECIFIED. (2001) Component thermalization time-scale estimate for the advection dominated accretion flow around Sgr A. NEW ASTRONOMY, 6 (8). pp. 487-491. ISSN 1384-1092Full text not available from this repository.
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|
|Official Date:||September 2001|
|Number of Pages:||5|
|Page Range:||pp. 487-491|
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