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Component thermalization time-scale estimate for the advection dominated accretion flow around Sgr A
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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 | ||||
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Subjects: | Q Science > QB Astronomy | ||||
Journal or Publication Title: | NEW ASTRONOMY | ||||
Publisher: | ELSEVIER SCIENCE BV | ||||
ISSN: | 1384-1092 | ||||
Official Date: | September 2001 | ||||
Dates: |
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Volume: | 6 | ||||
Number: | 8 | ||||
Number of Pages: | 5 | ||||
Page Range: | pp. 487-491 | ||||
Publication Status: | Published |
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