Revealing the nature of the highly obscured galactic source IGR J16318-4848

Simple item page
dc.creatorChaty, Sylvain
dc.creatorFilliatre, Philippe
dc.date2004-04-16
dc.date.accessioned2026-07-07T02:12:55Z
dc.date.available2026-07-07T02:12:55Z
dc.descriptionThe X-ray source IGR J16318-4848 was the first source discovered by INTEGRAL on 2003, January 29. We carried out optical and near-infrared (NIR) observations at the European Southern Observatory (ESO La Silla) in the course of a Target of Opportunity (ToO) programme. We discovered the optical counterpart and confirmed an already proposed NIR candidate. NIR spectroscopy revealed a large amount of emission lines, including forbidden iron lines and P-Cygni profiles. The spectral energy distribution of the source points towards a high luminosity and a high temperature, with an absorption greater than the interstellar absorption, but two orders of magnitude lower than the X-ray absorption. We show that the source is an High Mass X-ray binary (HMXB) at a distance between ~1 and 6 kpc, the mass donor being an early-type star, probably a sgB[e] star, surrounded by a rich and absorbing circumstellar material. This would make the second High Mass X-ray Binary (HMXB) with a sgB[e] star after CI Cam, indicating that a new class of strongly absorbed X-ray binaries is being unveiled by INTEGRAL.
dc.descriptionto appear in proceedings of the IAU conference #194, Compact Binaries in the Galaxy and beyond, La Paz, Mexico, 17-22 November 2003, ed. G. Tovmassian & E. Sion, RevMexAA (CS)
dc.identifierhttps://arxiv.org/abs/astro-ph/0404332
dc.identifierhttp://arxiv.org/abs/astro-ph/0404332
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/7632
dc.subjectAstrophysics
dc.titleRevealing the nature of the highly obscured galactic source IGR J16318-4848
dc.typetext

Files

Collections

arXiv