Volume 471, Number 2, August IV 2007
|Page(s)||L25 - L27|
|Published online||18 June 2007|
Letter to the Editor
Transient jets in V617 Sagittarii *
Instituto de Astronomia, Geofísica e Ciências Atmosféricas, Universidade de São Paulo, 05508-900 São Paulo, SP, Brazil e-mail: email@example.com
2 IP&D, Universidade do Vale do Paraíba, Av. Shishima Hifumi, 2911, CEP 12244-000 São José dos Campos, SP, Brazil e-mail: firstname.lastname@example.org
3 SOAR Telescope, Casilla 603, La Serena, Chile
4 Laboratório Nacional de Astrofísica – LNA/MCT, Itajubá, MG, Brazil
Accepted: 6 June 2007
Context.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.
Aims.If V Sge stars are indeed the analogs of CBSS, one may expect transient jet emission in other objects of this class.
Methods.Spectroscopic observations of the V Sge star V617 Sgr have been made, both at high photometric state and at decline.
Results.We show that V617 Sgr presents Hα satellites at high photometric state with velocities of ±780 km s-1.
Conclusions.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.
Key words: stars: binaries: close / stars: neutron / stars: individual: V617 Sgr / stars: emission-line, Be
© ESO, 2007
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.