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IPM
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“School of Astronomy”

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Paper   IPM / Astronomy / 12795
School of Astronomy
  Title:   Radiation Spectrum of a Magnetized Supercritical Accretion Disc with Thermal Conduction
  Author(s): 
1.  M. Ghasemnezhad
2.  M. Khajavi
3.  S. Abbasi
  Status:   Published
  Journal: Astrophysics and Space Science
  No.:  arXiv:1304.6922
  Vol.:  346
  Year:  2013
  Pages:   341-349
  Supported by:  IPM
  Abstract:
We examine the effect of thermal conduction on the observational properties of a super critical hot magnetized flow. We obtained self-similar solution of a magnetized disc when the thermal conduction plays an important role. Follow of our first paper (Ghasemnezhad et al. 2012 (hereafter GKA12)) we have extended our solution on the observational appearance of the disc to show how physical condition such as thermal conduction, viscosity, and advection will change the observed luminosity of the disc, Continuous spectra and surface temperature of such discs was plotted. We apply the present model to black-hole X-ray binary LMC X-3 and narrow-line seyfert 1 galaxies, which are supposed to be under critical accretion rate. Our results show clearly that the surface temperature is strongly depends on the thermal conduction, the magnetic field and advection parameter. However we see that thermal conduction acts to oppose the temperature gradient as we expect and observed luminosity of the disc will reduce when thermal conduction is high. We have shown that in this model the spectra of critical accretion flows strongly depends on the inclination angle.

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