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Galaxies 2018, 6(1), 13; https://doi.org/10.3390/galaxies6010013

Polarization: A Method to Reveal the True Nature of the Dusty S-Cluster Object (DSO/G2)

1
I. Physikalisches Institut, Universität zu Köln, Zülpicher Str. 77, 50937 Köln, Germany
2
Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, 53121 Bonn, Germany
*
Author to whom correspondence should be addressed.
Received: 15 November 2017 / Revised: 6 December 2017 / Accepted: 11 January 2018 / Published: 17 January 2018
(This article belongs to the Special Issue Polarised Emission from Astrophysical Jets)
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Abstract

There have been different scenarios describing the nature of a dusty source, noted as Dusty S-cluster Object (DSO) or G2, orbiting around the Galactic centre super-massive black hole. Observing the polarized continuum emission of this source provides information on its nature and geometry. We show that this source is intrinsically polarized with polarization degree of 30%, implying that it has a non-spherical geometry, and a varying polarization angle in the ambient medium of the black hole. Its main observable properties can be well described and modeled with a pre-main-sequence star forming a bow shock as it approaches the Sgr A* position. View Full-Text
Keywords: Galaxy: centre; polarization; stars: pre-main-sequence; radiative transfer Galaxy: centre; polarization; stars: pre-main-sequence; radiative transfer
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Shahzamanian, B.; Eckart, A.; Zajacek, M.; Valencia-S., M.; Sabha, N.B. Polarization: A Method to Reveal the True Nature of the Dusty S-Cluster Object (DSO/G2). Galaxies 2018, 6, 13.

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