Transient jets in V617 Sagittarii

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.

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

References in corpus (7)

• The nature of the supersoft X-ray source RX~J0513--69
• Six supersoft X-ray binaries: system parameters and twin-jet outflows
• The LMC Supersoft X-Ray Binary RX J0513.9-6951
• Bipolar Jets and Orbital Dynamics of the Supersoft X-Ray Source RX J0019.8+2156
• WX Cen (= WR 48c) - a possible type Ia Supernova progenitor
• The eclipsing supersoft X-ray binary CAL 87
• Assisted stellar suicide in V617 Sgr

Cited by in corpus (4)

• Galactic Model Parameters and Space Density of Cataclysmic Variables in Gaia Era: New Constraints to Population Models
• Optical identification of the transient supersoft X-ray source RX J0527.8-6954, in the LMC
• The orbital period of the V Sge star candidate QU Carinae
• The confirmation and revision on the orbital period change of the possible type Ia supernova progenitor V617 Sagittarii