Two temperature solution and emergent spectra from compact objects
Abstract
In this talk we would discuss two-temperature accretion solution onto compact objects. It has been known that, in the two temperature regime, the number of flow variables are more than the number of governing equations. The system of equations are not complete and it admits degenrate solutions for the same set of constants of motion of the flow. We have used the second law of thermodynamics in addition to the equations of motion and the equation of state to obtain the unique accretion solution around black holes. Using this technique we have obtained accretion solutions in presence of magnetic dissipative heating and cooling processes like, bremsstrahlung and synchrotron emission. The synchrotron and bremsstrahlung photons further interact with the flow electrons and cools via inverse-Comptonization or heats through Comptonization, depending on the relative energies of the electrons and the seed photons. Although the overall spectra is dominated by leptonic processes as discussed above, but one may conjecure if there can be any weak but qualitatively different feature due to baryonic processes. We also compare the basic differences in these processes around a black hole and a neutron star.
- Publication:
-
43rd COSPAR Scientific Assembly. Held 28 January - 4 February
- Pub Date:
- January 2021
- Bibcode:
- 2021cosp...43E1708C