Volume 438, Number 3, August II 2005
|Page(s)||949 - 955|
|Section||Stellar structure and evolution|
|Published online||18 July 2005|
A search for very active stars in the Galaxy
Australia Telescope National Facility, CSIRO, PO Box 76, Epping, NSW 1710, Australia e-mail: firstname.lastname@example.org
2 Astro Space Center, Lebedev Physical Institute, 84/32 Profsoyuznaya St., 117997 Moscow, Russia
3 Isaac Newton Institute of Chile, Moscow Branch, 13 Universitetskij Pr., Moscow 119992, Russia
4 Observatoire de la Côte d'Azur, BP 4229, 06304 Nice Cedex 4, France e-mail: email@example.com
5 Anglo-Australian Observatory, PO Box 296, Epping, NSW 1710, Australia
6 Special Astrophysical Observatory, Nizhnij Arkhyz, Karachaevo-Cherkesia 369167, Russia
7 Sternberg Astronomical Institute, 13 Universitetskij Pr., Moscow 119992, Russia
Accepted: 9 February 2005
We report the first results of a systematic search near the plane of the Galaxy for so-called very active stars (VAS), which are characterized by a hard X-ray spectrum and activity in the radio domain. Candidates with hard X-ray binary-like spectra have been selected from the Bright ROSAT Source Catalogue in the Zone of Avoidance () and were tentatively identified in GB6/PMM/NVSS radio surveys. Most of them were observed with the ATCA and VLA. Precise radio coordinates have led to unambiguous optical identification for 60 candidates, and a sub-sample of five of them has been observed with the VLT. Also some discovery and confirmatory spectra were obtained with the AAT (4-m) and BTA (6-m). Spectroscopy with moderate dispersion, made with the FORS1 spectrograph of the VLT has revealed two stellar objects (one of them, VASC J1628-41, is definitively a binary VAS), one new AGN and two featureless spectrum sources. One of these objects, VASC J1353-66, shows marginal evidence of proper motion, which, if confirmed, would imply the discovery of a new type of galactic source.
Key words: stars: activity
© ESO, 2005
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.