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Tidal disruption of stripped red giants by massive black holes

Published online by Cambridge University Press:  01 April 2008

Y. Lu ,
Y. F. Huang ,
S. N. Zhang  and
P. Lu
Y. Lu
Affiliation:
National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China email: ly@bao.ac.cn
Y. F. Huang
Affiliation:
Department of Astronomy, Nanjing University, Nanjing 210093, China
S. N. Zhang
Affiliation:
Physics Department and Center for Astrophysics, Tsinghua University, Beijing 100084, China
P. Lu
Affiliation:
National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China email: ly@bao.ac.cn
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Abstract

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We investigate the tidal disruption of a red giant whose envelope is thought to be stripped off when it passed by a massive black hole. Since the low-density stellar envelope would be lost, the tidal disruption of a red giant by massive black hole is regarded as primarily happening in its core region. The object is called a stripped red giant (SRG). Comparing our results with the three candidate tidal disruption events detected by Chandra in 2001 and 2002, i.e., the X-ray flares of NGC 5905, RX J1242.6-1119A, and RX J1624.9+7554, we argue that the tidal disruption of a stripped red giant is strongly ruled out.

Keywords

Accretion: accretion disksblack hole physicsgalaxies: nuclei
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 4 , Symposium S252: The Art of Modeling Stars in the 21st Century , April 2008 , pp. 343 - 344
Copyright
Copyright © International Astronomical Union 2008

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