6533b833fe1ef96bd129b79a
RESEARCH PRODUCT
Unveiling the nature of IGR J16493-4348 with IR spectroscopy
R. E. MennickentE. NespoliJuan Fabregatsubject
PhysicsHigh Energy Astrophysical Phenomena (astro-ph.HE)Accretion (meteorology)InfraredAstrophysics::High Energy Astrophysical PhenomenaExtinction (astronomy)Infrared spectroscopyFOS: Physical sciencesAstronomy and AstrophysicsContext (language use)AstrophysicsAccretion discSpace and Planetary ScienceSupergiantAstrophysics - High Energy Astrophysical PhenomenaSpectrographAstrophysics::Galaxy Astrophysicsdescription
The International Gamma-Ray Astrophysics Laboratory (INTEGRAL) is discovering a large number of new hard X-ray sources, many of them being HMXBs. The identification and spectral characterization of their optical/infrared counterparts is a necessary step in undertaking a detailed study of these systems. In a previous paper, we presented spectral analyses and classifications of six newly discovered INTEGRAL sources. In this paper, we extend the analysis to IGR J16493-4348. We used the ESO/VLT ISAAC spectrograph to observe the proposed IR counterpart to the source, obtaining a Ks medium-resolution spectrum (R = 500) with a signal-to-noise ratio (S/N) >150. We classified the source by comparing with published atlases. We spectrally classified the source as a B0.5-1 supergiant and estimated its interstellar extinction. We compared the extinction derived from X-ray data with effective interstellar extinction obtained from our data, discussing the absorption component associated with the circumstellar environment.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2010-04-23 |