WR 35a: A new double-lined spectroscopic binary⋆
Instituto de Astrofísica de La Plata, CCT La Plata-CONICET, Facultad de
Ciencias Astronómicas y Geofísicas, Universidad Nacional de La Plata,
Paseo del Bosque S/N, (1900),
2 Instituto de Ciencias Astronómicas de la Tierra y del Espacio (ICATE), CONICET, Avda. España 1512 Sur, J5402 DSP San Juan, Argentina
3 Departamento de Física, Universidad de La Serena, Av. Cisternas 1200 Norte, La Serena, Chile
4 Gemini Observatory, Northern Operations Center, 670 North A’ohoku Place, Hilo HI 96720, USA
5 Département de physique, Université de Montréal, CP 6128, Succ. Centre-Ville, Montréal ( QC ) H3C 3J7, Canada
Received: 4 December 2013
Accepted: 7 December 2013
Aims. We present the first orbital solution for the Wolf-Rayet star, WR 35a, that was discovered by a spectroscopic monitoring of faint WN-type stars.
Methods. Spectral features of two different components were identified, and thus a method of disentangling the individual spectra of both components was applied. Radial velocities were determined for each component in the binary system.
Results. The orbital solution and component properties of the system were derived. We determined that WR 35a is composed of a WN6 star with a O8.5 V companion orbiting at a 41.90-day period.
Key words: binaries: spectroscopic / stars: individual: WR 35a / stars: Wolf-Rayet
Table 2 is available in electronic form at http://www.aanda.org
Fellow of CONICET, and visiting astronomer, Cerro Tololo Inter-American Observatory (Chile) and CASLEO (Argentina).
© ESO, 2014