EDP Sciences
Free access
Volume 408, Number 2, September III 2003
Page(s) 689 - 692
Section Stellar atmospheres
DOI http://dx.doi.org/10.1051/0004-6361:20031089

A&A 408, 689-692 (2003)
DOI: 10.1051/0004-6361:20031089

Research Note

A WN4 companion to BD +62°2296 in Cas OB5

I. Negueruela1, 2

1  Dpto. de Física, Ing. de Sistemas y Teoría de la Señal, Universidad de Alicante, Apdo. 99, 03080 Alicante, Spain
2  Observatoire de Strasbourg, 11 rue de l'Université, 67000 Strasbourg, France

(Received 19 March 2003 / Accepted 7 July 2003)

I report observations of the triple system showing that all its components are early-type stars, most likely physically related. The faintest component is a hitherto uncatalogued Wolf-Rayet star. The brightest component, star A, is shown to be a seemingly normal B2.5Ia supergiant. Long-slit spectroscopy of BD +62°2296B shows it to be a narrow-lined WN4 star. Given the spatial separation, the two objects are unlikely to form a physical binary. Spectra of the third visual component, BD +62°2296C , allow its classification as a B0III star. Such concentration of massive stars strongly suggests that BD +62°2296 is in reality a very compact young open cluster in the area of the OB association Cas OB5.

Key words: stars: early-type -- stars: distances -- stars: Wolf-Rayet -- stars: individual: BD +62°2296 -- stars: binaries: close -- stars: binaries: spectroscopic

SIMBAD Objects

© ESO 2003