Discrete Mass Ejections from the Be/X-ray Binary A0535+26/HD245770

Details Discrete Mass Ejections from the Be/X-ray Binary A0535+26/HD245770 Discrete Mass Ejections from the Be/X-ray Binary A0535+26/HD245770

2011-11-03

arxiv.org/abs/1111.0715v1

Astronomy and Astrophysics

Astrophysics

High Energy Astrophysical Phenomena

16 pages, 5 figures. Accepted for publication in the Astrophysical Journal

Scientific paper

We present the long-term optical spectroscopic observations on the Be/X-ray binary A0535+26 from 1992 to 2010. Combining with the public V-band photometric data, we find that each giant X-ray outburst occurred in a fading phase of the optical brightness. The anti-correlation between the optical brightness and the H$\alpha$ intensity during our 2009 observations indicates a mass ejection event had taken place before the 2009 giant X-ray outburst, which might cause the formation of a low-density region in the inner part of the disk. The similar anti-correlation observed around 1996 September indicates the occurrence of the mass ejection, which might trigger the subsequent disk loss event in A0535+26.

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