Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Detecting Stars at the Galactic Centre via Synchrotron Emission   Stars orbiting within 1$\arcsec$ 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 10$^{14}$ 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
pericenter. The star S2 will be $\sim 0.015\arcsec$ from Sgr A* in 2018, and is
an excellent target to test our predictions.

3
The categories of this paper are: physics
0
The categories of this paper are: hep-ph
31
The categories of this paper are: ao-sci
37
The categories of this paper are: supr-con
9
The categories of this paper are: nlin
35
The categories of this paper are: mtrl-th
22
The categories of this paper are: chao-dyn
27
The categories of this paper are: comp-gas
10
The categories of this paper are: q-bio
28
The categories of this paper are: alg-geom
36
The categories of this paper are: cmp-lg
34
The categories of this paper are: chem-ph
18
The categories of this paper are: econ
5
The categories of this paper are: gr-qc
13
The categories of this paper are: quant-ph
17
The categories of this paper are: q-fin