The nature of the infrared counterpart of IGR J19140+0951 |
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| Authors: | D C Hannikainen M G Rawlings P Muhli O Vilhu J Schultz J Rodriguez |
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| Institution: | Observatory, PO Box 14, FI-00014 University of Helsinki, Finland;Joint Astronomy Centre, 660 N. A'ohoku Place, University Park, Hilo, HI 96270, USA;AIM –Astrophysique Interactions Multi-échelles (UMR 7158 CEA/CNRS/UniversitéParis 7 Denis Diderot), CEA Saclay, DSM/DAPNIA/Service d'Astrophysique, Bât. 709, l'Orme des Mesuriers, FR-91 191 Gif-sur-Yvette Cedex, France |
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| Abstract: | The International Gamma-Ray Astrophysics Laboratory observatory has been (re-)discovering new X-ray sources since the beginning of nominal operations in early 2003. These sources include X-ray binaries, active galactic nuclei, cataclysmic variables, etc. Amongst the X-ray binaries, the true nature of many of these sources has remained largely elusive, though they seem to make up a population of highly absorbed high-mass X-ray binaries. One of these new sources, IGR J19140+0951, was serendipitously discovered on 2003 March 6 during an observation of the galactic microquasar GRS 1915+105. We observed IGR J19140+0951 with the United Kingdom Infrared Telescope in order to identify the infrared counterpart. Here we present the H - and K -band spectra. We determined that the companion is a B0.5-type bright supergiant in a wind-fed system, at a distance ?5 kpc. |
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| Keywords: | stars: individual: IGR J19140+0951 infrared: stars X-rays: binaries |
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