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Fully analytical solutions for Bondi accretion in galaxies with a central Black Hole

Published online by Cambridge University Press:  07 April 2020

Luca Ciotti Open the ORCID record for Luca Ciotti [Opens in a new window]  and
Silvia Pellegrini Open the ORCID record for Silvia Pellegrini [Opens in a new window]
Luca Ciotti
Affiliation:
Department of Physics and Astronomy, University of Bologna, via Gobetti 93/2, 40129 Bologna, Italy email: luca.ciotti@unibo.it
Silvia Pellegrini
Affiliation:
Department of Physics and Astronomy, University of Bologna, via Gobetti 93/2, 40129 Bologna, Italy email: luca.ciotti@unibo.it
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Abstract

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The fully analytical solution for isothermal Bondi accretion on a black hole (MBH) at the center of JJ two-component Jaffe (1983) galaxy models is presented. In JJ models the stellar and total mass density distributions are described by the Jaffe profile, with different scale-lengths and masses, and to which a central MBH is added; all the relevant stellar dynamical properties can also be derived analytically. In these new accretion solutions the hydrodynamical and stellar dynamical properties are linked by imposing that the gas temperature is proportional to the virial temperature of the stellar component. The formulae that are provided allow to evaluate all flow properties, and are then useful for estimates of the accretion radius and the mass flow rate when modeling accretion on MBHs at the center of galaxies.

Keywords

galaxies: elliptical and lenticularcDgalaxies: ISMgalaxies: nucleihydrodynamicsstellar dynamics
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 14 , Symposium S342: Perseus in Sicily: From Black Hole to Cluster Outskirts , May 2018 , pp. 5 - 8
Copyright
© International Astronomical Union 2020

References

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