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Astrophysics

arXiv:0706.2170 (astro-ph)
[Submitted on 14 Jun 2007]

Title:Transient jets in V617 Sagittarii

Authors: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.
Comments: Four pages, accepted to be published as a Letter in A&A
Subjects: Astrophysics (astro-ph)
Cite as: arXiv:0706.2170 [astro-ph]
  (or arXiv:0706.2170v1 [astro-ph] for this version)
  https://doi.org/10.48550/arXiv.0706.2170
Related DOI: https://doi.org/10.1051/0004-6361%3A20077847

Submission history

From: Alexandre Oliveira [view email]
[v1] Thu, 14 Jun 2007 17:55:30 UTC (23 KB)
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