SIMBAD references

2016MNRAS.455L..21G - Mon. Not. R. Astron. Soc., 455, L21-L25 (2016/January-1)

Detecting stars at the galactic centre via synchrotron emission.


Abstract (from CDS):

Stars orbiting within 1arcsec of the supermassive black hole in the Galactic Centre, Sgr A*, are notoriously difficult to detect due to obscuration by gas and dust. We show that some stars orbiting this region may be detectable via synchrotron emission. In such instances, a bow shock forms around the star and accelerates the electrons. We calculate that around the 10 GHz band (radio) and at 1014 Hz (infrared) the luminosity of a star orbiting the black hole is comparable to the luminosity of Sgr A*. The strength of the synchrotron emission depends on a number of factors including the star's orbital velocity. Thus, the ideal time to observe the synchrotron flux is when the star is at pericentre. The star S2 will be ∼ 0.015arcsec from Sgr A* in 2018, and is an excellent target to test our predictions.

Abstract Copyright: © 2015 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society (2015)

Journal keyword(s): black hole physics - radiation mechanisms: non-thermal - Galaxy: centre - Galaxy: kinematics and dynamics

Simbad objects: 5

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