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arXiv · 0706.2170

Transient jets in V617 Sagittarii

J. E. Steiner·A. S. Oliveira·C. A. O. Torres·A. Damineli
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Abstract

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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J. E. Steiner, A. S. Oliveira, C. A. O. Torres, A. Damineli. 2007-06-14. Transient jets in V617 Sagittarii. https://doi.org/10.1051/0004-6361:20077847

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