First correlation between compact object and circumstellar disk in the Be/X-ray binaries

Details First correlation between compact object and circumstellar disk in the Be/X-ray binaries First correlation between compact object and circumstellar disk in the Be/X-ray binaries

2000-05-09

arxiv.org/abs/astro-ph/0005201v1

Astronomy and Astrophysics

Astrophysics

4 pages, 2 figures, accepted by Astronomy and Astrophysics Letters

Scientific paper

A remarkable correlation between the H-alpha emission line and the radio behaviour of LSI+61 303 (V615 Cas, GT 0236+610) over its 4 yr modulation is discovered. The radio outburst peak is shifted by a quarter of the 4 yr modulation period (about 400 days) with respect to the equivalent width of the H-alpha emission line variability. The onset of the LSI+61 303 radio outbursts varies in phase with the changes of the H-alpha emission line, at least during the increase of H-alpha equivalent width. This is the first clear correlation between the emission associated to the compact object and the Be circumstellar disk in a Be/X-ray binary system.

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