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Theory of G2 cloud multi-wavelength emission

Published online by Cambridge University Press:  22 May 2014

R. V. Shcherbakov
R. V. Shcherbakov*
Affiliation:
Department of Astronomy, University of Maryland, College Park, MD 20742-2421, USA email: roman@astro.umd.edu
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Abstract

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An object called G2 was recently discovered moving towards the supermassive black hole in the Galactic center. G2 emits infrared (IR) lines and continuum, which allows constraining its properties. The question is still unresolved whether G2 has a central windy star or it is a coreless cloud. Assuming the object is a cloud originating near the apocenter I perform line/continuum IR diagnostics, revisit estimates of non-thermal emission from pericenter passage, and speculate about future observational prospects. This work is partially reported in Shcherbakov (2013) and partially consists of new ideas discussed at the conference.

Keywords

black hole physics — Galaxy: center — ISM: clouds — magnetic fields — radiation mechanisms: general — radiative transfer

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