Unveiling the nature of IGR J16283-4838

Details Unveiling the nature of IGR J16283-4838 Unveiling the nature of IGR J16283-4838

2010-11-05

arxiv.org/abs/1011.1517v1

Astronomy and Astrophysics

Astrophysics

High Energy Astrophysical Phenomena

6 pages, 5 figures, accepted for publication in Astronomy & Astrophysics

Scientific paper

Context. One of the most striking discoveries of the INTEGRAL observatory is the existence of a previously unknown population of X-ray sources in the inner arms of the Galaxy. The investigations of the optical/NIR counterparts of some of them have provided evidence that they are highly absorbed high mass X-ray binaries hosting supergiants. Aims. We aim to identify the optical/NIR counterpart of one of the newly discovered INTEGRAL sources, IGR J16283-4838, and determine the nature of this system. Methods. We present optical and NIR observations of the field of IGR J16283-4838, and use the astrometry and photometry of the sources within it to identify its counterpart. We obtain its NIR spectrum, and its optical/NIR spectral energy distribution by means of broadband photometry. We search for the intrinsic polarization of its light, and its short and long-term photometric variability. Results. We demonstrate that this source is a highly absorbed HMXB located beyond the Galactic center, and that it may be surrounded by a variable circumstellar medium.

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