BLUE STARS; H II REGIONS; NEBULAE; STELLAR LUMINOSITY; VARIABLE STARS; FORBIDDEN TRANSITIONS; H ALPHA LINE; NITROGEN IONS; OXYGEN SPECTRA; STELLAR MASS EJECTION; SUPERGIANT STARS
Abstract :
[en] Narrow-band filter imagery as well as medium to high resolution spectroscopy of the nebula surrounding the luminous blue variable (LBV) star WRA 751 are presented. The nebula appears as a slowly expanding H II region of low excitation characterized by a significant N/O overabundance which may be due to the presence in the nebula of nuclear processed material ejected by the star. With the recent discovery of a nebula around HR Car, all but one known galactic LBVs are now shown to be associated with a nebula. These nebula have rather similar physical characteristics, one of the most important being that all of them apparently contain processed material.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Hutsemekers, Damien ; Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Astroph. extragalactique et observations spatiales (AEOS)
van Drom, E.; Liege, Institut d'Astrophysique, Belgium
Language :
English
Title :
The nature of the nebula associated with the luminous blue variable star WRA 751