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Astrophysics > Solar and Stellar Astrophysics

arXiv:1401.0707 (astro-ph)
[Submitted on 3 Jan 2014]

Title:The XMM-Newton view of the yellow hypergiant IRC +10420 and its surroundings

Authors:M. De Becker, D. Hutsemékers, E. Gosset
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Abstract:Among evolved massive stars likely in transition to the Wolf-Rayet phase, IRC +10420 is probably one of the most enigmatic. It belongs to the category of yellow hypergiants and it is characterized by quite high mass loss episodes. Even though IRC +10420 benefited of many observations in several wavelength domains, it has never been a target for an X-ray observatory. We report here on the very first dedicated observation of IRC +10420 in X-rays, using the XMM-Newton satellite. Even though the target is not detected, we derive X-ray flux upper limits of the order of 1--3 10^-14 erg cm^-2 s^-1 (between 0.3 and 10.0 keV), and we discuss the case of IRC +10420 in the framework of emission models likely to be adequate for such an object. Using the Optical/UV Monitor on board XMM-Newton, we present the very first upper limits of the flux density of IRC +10420 in the UV domain (between 1800 and 2250 A, and between 2050 and 2450 A). Finally, we also report on the detection in this field of 10 X-ray and 7 UV point sources, and we briefly discuss their properties and potential counterparts at longer wavelengths.
Comments: 9 pages, 4 figures, accepted for publication in New Astronomy (in press)
Subjects: Solar and Stellar Astrophysics (astro-ph.SR); High Energy Astrophysical Phenomena (astro-ph.HE)
Cite as: arXiv:1401.0707 [astro-ph.SR]
  (or arXiv:1401.0707v1 [astro-ph.SR] for this version)
  https://doi.org/10.48550/arXiv.1401.0707
Related DOI: https://doi.org/10.1016/j.newast.2013.12.00

Submission history

From: Michael De Becker [view email]
[v1] Fri, 3 Jan 2014 20:16:27 UTC (328 KB)
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