On the nature of the microquasar V4641 Sagittarii

Citation
S. Chaty et al., On the nature of the microquasar V4641 Sagittarii, ASTRO SP SC, 276, 2001, pp. 153-156
Citations number
7
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Space Sciences
Journal title
ASTROPHYSICS AND SPACE SCIENCE
ISSN journal
0004-640X → ACNP
Volume
276
Year of publication
2001
Supplement
S
Pages
153 - 156
Database
ISI
SICI code
0004-640X(2001)276:<153:OTNOTM>2.0.ZU;2-A
Abstract
We present photometric and spectroscopic optical and near-infrared (NIR) ob servations taken during the outburst on September 1999 of the source V4641 Sgr=SAX J1819.3-2525 (in't Zand et al., 2000) = XTE J1819-254 (Markwardt et al., 1999). We show that our observations suggest a distance between 4 and 8 kpc, the spectral type of the companion star being constrained between B 3 and A2 V, making the system a High Mass X-ray Binary System (HMXB). In vi ew of the radio and optical/NIR observations, it is possible that the eject a of the source interacted with the surrounding medium of the source.