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The M31-WC6 star MLA 1159 and its ionized nebula BA1-642

Published online by Cambridge University Press:  25 May 2016

Gaghik H. Tovmassian ,
Jochen Greiner ,
Stefanie Komossa ,
Margarita Rosado  and
Anabel Arrieta
Gaghik H. Tovmassian
Affiliation:
Instituto de Astronomía, UNAM, B.C., México
Jochen Greiner
Affiliation:
Astrophysical Institute Potsdam, Potsdam, Germany
Stefanie Komossa
Affiliation:
Max-Planck-Institute for extraterrestrial Physics, Garching, Germany
Margarita Rosado
Affiliation:
Instituto de Astronomía, UNAM, B.C., México
Anabel Arrieta
Affiliation:
Instituto de Astronomía, UNAM, B.C., México

Abstract

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Aimed at identifying supersoft X-ray sources in ionization nebulae, we have searched for extended optical emission within the X-ray error boxes of the 15 supersoft sources in M31 (Greiner et al. 1996). One optical nebula was found, of which we obtained spectroscopy, narrow-band imaging and FP-interferometry, to determine its relation to the positionally correlated supersoft X-ray source RX J0045.5+4206. M31 has been surveyed several times with different goals. Baade & Arp (1964) compiled a list of 688 emission nebula in M 31. One of these nebulae, BA1-642 (PAV 78915 in the catalog of Pellet et al. 1978), was found by cross-correlation with supersoft X-ray sources. The central object MLA 1159 of this nebula has been classified WR (Meyssonier et al. 1993). Here we confirm this new WR star and discuss the star as well the ring-like nebula around it. We did direct imaging of RX J0045.4+4206 with narrow-band nebular filters, spectroscopy of the central star and surrounding nebulae, and we observed the nebula with the FP-interferometer PUMA. All observations were carried out at OAN SPM, México.

Type
Part 4. Wolf-Rayet stars and other hot massive stars in the Galactic Center and in Local Group giant H II regions (individual stars)
Information
Symposium - International Astronomical Union , Volume 193: Wolf-Rayet Phenomena in Massive Stars and Starburst Galaxies , 1999 , pp. 501 - 502
Copyright
Copyright © Astronomical Society of the Pacific 1999 

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