A&A 405, 571-575 (2003)
DOI: 10.1051/0004-6361:20030611

LSS 1135: An O-type spectroscopic binary in the galactic OB association Bochum 7

M. Corti, V. Niemela and N. Morrell

Facultad de Ciencias Astronómicas y Geofísicas, U.N. La Plata, Paseo del Bosque s/n, 1900 La Plata, Argentina
(Received 24 February 2003 / Accepted 14 April 2003)

Abstract
From radial velocities derived from optical spectroscopic observations performed at CTIO, Chile, and CASLEO, Argentina, we have discovered that LSS 1135 is a single-lined O-type binary system with an orbital period of 2.7532 days. We present an analysis of the orbital elements of this system based on radial velocities of the He absorption lines. We classify the spectrum of LSS 1135 as O6.5V((f)). We also present spectral classifications and radial velocities for other seven OB stars in the region of Bochum 7, an OB association to which LSS 1135 belongs. Our data indicate a distance of 5.0 kpc for this star group.

Key words: Galaxy: open clusters and associations: individual: Bochum 7 (Vela OB 3) -- stars: binaries: spectroscopic -- stars: early-type

Offprint request: M. Corti, mariela@lilen.fcaglp.unlp.edu.ar

SIMBAD Objects

© ESO 2003

The OpenURL standard is a protocol for transmission of metadata describing the resource that you wish to access. An OpenURL link contains article metadata and directs it to the OpenURL server of your choice. The OpenURL server can provide access to the resource and also offer complementary services (specific search engine, export of references...). The OpenURL link can be generated by different means.

• If your librarian has set up your subscription with an OpenURL resolver, OpenURL links appear automatically on the abstract pages.
• You can define your own OpenURL resolver with your EDPS Account. In this case your choice will be given priority over that of your library.
• You can use an add-on for your browser (Firefox or I.E.) to display OpenURL links on a page (see http://www.openly.com/openurlref/). You should disable this module if you wish to use the OpenURL server that you or your library have defined.