Multiwavelength monitoring of BD+53°2790 , the optical counterpart to 4U 2206+54
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Multiwavelength monitoring of BD+53°2790 , the optical counterpart to 4U 2206+54

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Multiwavelength monitoring of BD+53°2790 , the optical counterpart to 4U 2206+54

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dc.contributor.author Blay Serrano, Pedro Jose
dc.contributor.author Negueruela, I.
dc.contributor.author Reig Torres, Pablo
dc.contributor.author Coe, M.J.
dc.contributor.author Corbet, R.H.D.
dc.contributor.author Fabregat Llueca, Juan
dc.contributor.author Tarasov, A.E.
dc.date.accessioned 2010-06-29T10:31:31Z
dc.date.available 2010-06-29T10:31:31Z
dc.date.issued 2006
dc.identifier.uri http://hdl.handle.net/10550/13991
dc.description.abstract We present the results of our long-term monitoring of BD +53◦2790, the optical counterpart to the X-ray source 4U 2206+54. Unlike previous studies that classify the source as a Be/X-ray binary, we find that its optical and infrared properties differ from those of typical Be stars: the variability of the V/R ratio is not cyclical; there are variations in the shape and strength of the Hα emission line on timescales less than 1 day; and no correlation between the EW and the IR magnitudes or colors is seen. Our observations suggest that BD +53º2790 is very likely a peculiar O9.5V star. In spite of exhaustive searches we cannot find any significant modulation in any emission line parameter or optical/infrared magnitudes. Spectroscopy of the source extending from the optical to the K-band confirms the peculiarity of the spectrum: not only are the He lines stronger than expected for an O9.5V star but also there is no clear pattern of variability. The possibility that BD +53◦2790 is an early-type analogue to He-strong stars (like θ^1 Ori C) is discussed. en
dc.language.iso en en
dc.relation http://www.aanda.org/articles/aa/pdf/2006/06/aa3951-05.pdf en
dc.source BLAY SERRANO, Pedro Jose ; Negueruela, I. ; Reig Torres, Pablo ; Coe, M.J. ; Corbet, R.H.D. ; Fabregat Llueca, Juan ; Tarasov, A.E., 2006, Multiwavelength monitoring of BD+53°2790 , the optical counterpart to 4U 2206+54, Astronomy and Astrophysics, vol. 446, no. 3, p. 1095-1105 en
dc.subject Stars ; Early-type ; Emission-line ; Be ; Magnetic fields ; Individual ; BD+53º2790 en
dc.title Multiwavelength monitoring of BD+53°2790 , the optical counterpart to 4U 2206+54 en
dc.type info:eu-repo/semantics/article en
dc.type info:eu-repo/semantics/publishedVersion en
dc.subject.unesco UNESCO::ASTRONOMÍA Y ASTROFÍSICA en
dc.subject.unesco UNESCO::ASTRONOMÍA Y ASTROFÍSICA::Cosmología y cosmogonia en
dc.identifier.doi 10.1051/0004-6361:20053951 en
dc.description.private Blay Serrano, Pedro Jose, Pere.Blay@uv.es ; Reig Torres, Pablo, Pablo.Reig@uv.es ; Fabregat Llueca, Juan, Juan.Fabregat@uv.es en
dc.identifier.idgrec 027123 en

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