Transient jets in V617 Sagittarii

Details Transient jets in V617 Sagittarii Transient jets in V617 Sagittarii

2007-06-14

arxiv.org/abs/0706.2170v1

Astronomy and Astrophysics

Astrophysics

Four pages, accepted to be published as a Letter in A&A

Scientific paper

10.1051/0004-6361:20077847

Some of the luminous Compact Binary Supersoft X-Ray sources (CBSS) have shown indications of jets, also called satellites due to their appearance in the spectra. In V Sagittae (V Sge) stars, the galactic counterparts of the CBSS, such features have been reported only for WX Cen. If V Sge stars are indeed the analogs of CBSS, one may expect transient jet emission in other objects of this class. Spectroscopic observations of the V Sge star V617 Sgr have been made, both at high photometric state and at decline. We show that V617 Sgr presents Halpha satellites at high photometric state with velocities of +/-780 km/s. This feature confirms, once more, the CBSS nature of the V Sge stars, however the details of the spectral characteristics also suggest that the two groups of stars display some intrinsic spectroscopic differences, which are likely to be due to a selection effect related to chemical abundance.

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