SIMBAD references

2002A&A...381..951H - Astronomy and Astrophysics, volume 381, 951-958 (2002/1-3)

STIS spectroscopy of newborn massive stars in SMC N81.

HEYDARI-MALAYERI M., ROSA M.R., SCHAERER D., MARTINS F. and CHARMANDARIS V.

Abstract (from CDS):

Using Hubble Space Telescope observations with STIS, we study the main exciting stars of N81, a high excitation compact HII region in the Small Magellanic Cloud (SMC). These far UV observations are the first spectroscopic measurements of stars in such a region and reveal features characteristic of an O6-O8 stellar type. The astonishing weakness of their wind profiles and their sub-luminosity (up to ∼2mag fainter in MV than the corresponding dwarfs) make these stars a unique stellar population in the Magellanic Clouds. Our analysis suggests that they are probably in the Hertzsprung-Russell diagram locus of a particularly young class of massive stars, the so-called Vz luminosity class, as they are arriving at the zero age main sequence.

Abstract Copyright:

Journal keyword(s): stars: early-type - ISM: dust, extinction - ISM: HII regions - ISM: individual objects: N81 - galaxies: Magellanic Clouds

Simbad objects: 17

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2023.02.02-03:22:23

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