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arXiv:astro-ph/0011407 (astro-ph)
[Submitted on 22 Nov 2000]

Title:The Be/X-ray transient 4U 0115+63/V635 Cas I. A consistent model

Authors:I. Negueruela (SAX SDC & Liverpool JMU, now Strasbourg)A. T. Okazaki (Hokkai-Gakuen)
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Abstract: We present photometry and high SNR spectroscopy in the classification region of V635 Cas, the optical counterpart to the transient X-ray pulsator 4U 0115+63, taken at a time when the circumstellar envelope had disappeared. V635 Cas is classified as a B0.2Ve star at a distance of 7-8 kpc. We use the physical parameters derived from these observations and the orbit derived from X-ray observations to elaborate a model of the system based on the theory of decretion discs around Be stars. We show that the disc surrounding the Be star must be truncated by the tidal/resonant interaction with the neutron star and cannot be in a steady state. This explains many of the observed properties of 4U 0115+63. In particular, because of this effect, under normal circumstances, the neutron star cannot accrete from the disc, which explains the lack of regular Type I outbursts from the source.
Comments: 10 pages, 6 figures, uses this http URL. To appear in Astronomy and Astrophysics Main Journal
Subjects: Astrophysics (astro-ph)
Cite as: arXiv:astro-ph/0011407
  (or arXiv:astro-ph/0011407v1 for this version)
  https://doi.org/10.48550/arXiv.astro-ph/0011407
Journal reference: Astron.Astrophys. 369 (2001) 108
Related DOI: https://doi.org/10.1051/0004-6361%3A20010146

Submission history

From: Ignacio Negueruela [view email]
[v1] Wed, 22 Nov 2000 13:54:28 UTC (95 KB)
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