Abstract
We study the properties of sub-Keplerian accretion disk around a stationary black hole, considering bremsstrahlung, synchrotron and Comptonization of synchrotron photons as radiative cooling mechanisms active in the disk. We obtain the solutions of two-temperature global accretion flow (TTAF) and compare it with the results obtained from single-temperature (STAF) model. We observe that flow properties, in particular, the radial profile of electron and ion temperatures differ noticeably in the adopted models for flows with identical boundary conditions fixed at the outer edge of the disk. Since the electron temperature is one of the key factors to regulate the radiative processes, we argue that physically motivated description of electron temperature needs to be considered in studying the astrophysical phenomena around black holes.
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References
Belloni T. et al. 2006, MNRAS, 367, 1113
Chakrabarti S. K. 1989, ApJ, 347, 365
Chakrabarti S. K., Molteni D. 1995, MNRAS, 272, 80
Chakrabarti S., Titarchuk L. G. 1995, ApJ, 455, 623
Chakrabarti S. K. 1996, ApJ, 464, 664
Chattopadhyay I., Chakrabarti S. K. 2002, MNRAS, 333, 454
Colpi M., Maraschi L., Treves A. 1984, ApJ, 280, 319
Das S. 2007, MNRAS, 376, 1659
Das S., Chakrabarti S. K. 2004, Int. J. Mod. Phys. D, 13, 1955
Dihingia I., Das S., Mandal S. 2015, in Astronomical Society of India Conference Series, Volume 12
Dihingia I., Das S., Mandal S. 2017, MNRAS, in press
Fukue J. 1987, Publ. Astron. Soc. Japan, 39, 309
Gierliński M., Newton J. 2006, MNRAS, 370, 837
Kusunose M., Takahara F. 1988, Publ. Astron. Soc. Japan, 40, 435
Kusunose M., Takahara F. 1989, Publ. Astron. Soc. Japan, 41, 263
Luo C., Liang E. P. 1994, MNRAS, 266, 386
Mandal S., Chakrabarti S. K. 2005, A&A, 434, 839
Manmoto T., Mineshige S., Kusunose M. 1997, ApJ, 489, 791
Matsumoto R., Kato S., Fukue J., Okazaki A. T. 1984, Publ. Astron. Soc. Japan, 36, 71
Miyakawa T., Yamaoka K., Homan J., Saito K., Dotani T., Yoshida A., Inoue H. 2008, Publ. Astron. Soc. Japan, 60, 637
Narayan R., Yi I. 1995, ApJ, 452, 710
Paczynsky B., Wiita P. J. 1980, A&A, 88, 23
Piran T. 1978, ApJ, 221, 652
Pringle J. 1976, MNRAS, 177, 65
Rajesh S., Mukhopadhyay B. 2010, MNRAS, 402, 961
Rybicki G. B., Lightman A. P. 1979, Radiative Processes in Astrophysics, Wiley-Interscience
Shapiro S. L., Lightman A. P., Eardley D. M. 1976, ApJ, 204, 187
Spitzer L. 2013, Physics of fully ionized gases, Courier Corporation
Wandel A., Liang E. P. 1991, ApJ, 380, 84
White T. R., Lightman A. P. 1989, ApJ, 340, 1024
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Dihingia, I.K., Das, S. & Mandal, S. A comparative study of single-temperature and two-temperature accretion flows around black holes. J Astrophys Astron 39, 6 (2018). https://doi.org/10.1007/s12036-018-9511-z
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DOI: https://doi.org/10.1007/s12036-018-9511-z