Reference : Near-infrared identification of the counterpart to X1908+075: a new OB-supergiant X-r...
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Space science, astronomy & astrophysics
Near-infrared identification of the counterpart to X1908+075: a new OB-supergiant X-ray binary
Morel, Thierry [Osservatorio Astronomico di Palermo G. S. Vaiana, Istituto Nazionale di Astrofisica > > > >]
Grosdidier, Y. [Instituto de Astrofísica de Canarias, Calle Vía Láctea s/n, E-38200 La Laguna (Tenerife), Spain; Department of Physics, McGill University, 3600 University St., Montréal, Québec, Canada, H3A 2T8]
Monthly Notices of the Royal Astronomical Society
Blackwell Publishing
Yes (verified by ORBi)
United Kingdom
[en] stars: early-type ; infrared: stars ; X-rays: binaries ; X-rays: individual: X1908+075
[en] We report the near-infrared (near-IR) identification of the likely counterpart to X1908+075, a highly absorbed Galactic X-ray source recently suspected to belong to the rare class of OB supergiant-neutron star binary systems. Our JHK[SUB]s[/SUB]-band imaging of the field reveals the existence within the X-ray error boxes of a near-IR source consistent with an early-type star lying at d~ 7 kpc and suffering A[SUB]V[/SUB]~ 16 mag of extinction, the latter value being in good agreement with the hydrogen column density derived from modelling of the X-ray spectrum. Our follow-up, near-IR spectroscopic observations confirm the nature of this candidate and lead to a late O-type supergiant classification, thereby supporting the identification of a new Galactic OB-supergiant X-ray binary.

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