HEASARC Staff Scientist Position - Applications are now being accepted for a Staff Scientist with significant experience and interest in the technical aspects of astrophysics research, to work in the High Energy Astrophysics Science Archive Research Center (HEASARC) at NASA Goddard Space Flight Center (GSFC) in Greenbelt, MD. Refer to the AAS Job register for full details.

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diskpn: accretion disk, black hole, black body

Blackbody spectrum of an accretion disk. This is an extension of the diskbb model, including corrections for temperature distribution near the black hole. The temperature distribution was calculated in Paczynski-Wiita pseudo-Newtonian potential. An accretion rate can be computed from the maximum temperature found. For details see Gierlinski et al. (1999). Please note that the inner disk radius (par2) can be a free parameter only close to par2 = 6; otherwise par2 is strongly correlated with K.

par1 maximum temperature in the disk (keV)
par2 inner disk radius in Rg = GM/c$^2$ units, $6 \leq $ par2 $\leq 1000$
norm $M^2 \cos(i)/(D^2*\beta^4)$, where $M$ = central mass (solar masses), $D$ distance to the source (kpc), $i$ inclination of the disk, and $b$ color/effective temperature ratio.


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Last modified: Friday, 23-Aug-2024 13:20:40 EDT

HEASARC Staff Scientist Position - Applications are now being accepted for a Staff Scientist with significant experience and interest in the technical aspects of astrophysics research, to work in the High Energy Astrophysics Science Archive Research Center (HEASARC) at NASA Goddard Space Flight Center (GSFC) in Greenbelt, MD. Refer to the AAS Job register for full details.