C.D.S. - SIMBAD4 rel 1.7 - 2020.10.26CET05:20:32

2001A&A...369..108N - Astronomy and Astrophysics, volume 369, 108-116 (2001/4-1)

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


Abstract (from CDS):

We present photometry and high SNR spectroscopy in the classification region of V635 Cas, the optical counterpart to the transient X-ray pulsar 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 7-8kpc. 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 is 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.

Abstract Copyright:

Journal keyword(s): stars: circumstellar matter - stars: emission-line, Be - stars: individual: 4U 0115+63 - binaries: close - stars: neutron - X-ray: stars

Simbad objects: 3

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Number of rows : 3

N Identifier Otype ICRS (J2000)
ICRS (J2000)
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
1 V* V662 Cas HXB 01 18 02.6973905772 +65 17 29.829417242 12.27 11.99 11.14 10.33 9.58 B1Iae 232 0
2 V* V635 Cas HXB 01 18 31.9704429246 +63 44 33.071137750 17.05 16.64 15.19 14.34 13.22 B0.2Ve 669 0
3 HD 245770 HXB 05 38 54.5749436467 +26 18 56.839215267 9.30 9.84 9.39 8.77 8.30 O9/B0III/Ve 879 0

    Equat.    Gal    SGal    Ecl

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