H II REGIONS; MAGELLANIC CLOUDS; OPEN CLUSTERS; STELLAR MASS; STELLAR SYSTEMS; CHARGE COUPLED DEVICES; STELLAR LUMINOSITY; STELLAR SPECTROPHOTOMETRY
Abstract :
[en] It is shown that the brightest star in the most important H II region of the Small Magellanic Cloud (SMC) is a multiple system. The zero-age main sequence mass of this star drops significantly from the previously estimated value of 130 or 110 solar masses to less than 85 solar masses, while its present mass falls from 113 to 58 solar masses, both due to multiplicity and extinction correction. This is another piece of evidence against the existence of stars more massive than about 100 solar masses in the SMC. It is also shown that the present mass of one of the two known O3 stars in the SMC is significantly smaller than presently believed.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Heydari-Malayeri, M.; European Southern Observatory, Garching, Federal Republic of Germany
Hutsemekers, Damien ; Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Astroph. extragalactique et observations spatiales (AEOS)
Language :
English
Title :
The most massive star of the largest H II region in the Small Magellanic Cloud