2002A&A...381..951H


Query : 2002A&A...381..951H

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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Number of rows : 17
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 10205 1
2 [HMC2003b] 119 * 01 09 12.82 -73 11 40.2           ~ 3 0
3 S3MC J010912.68-731138.43 * 01 09 12.83 -73 11 38.3           ~ 3 0
4 [HRZ99] 2 * 01 09 13.03 -73 11 38.0     14.87     O6.5 5 0
5 [HMC2003b] 122 * 01 09 13.05 -73 11 38.3     14.38     O7 5 0
6 HD 7113 Em* 01 09 13.066 -73 11 38.92     11.7     ~ 118 0
7 [HRZ99] 5 * 01 09 13.28 -73 11 37.6           ~ 2 0
8 [HMC2003b] 127 * 01 09 13.35 -73 11 38.4     16.10     O8.5 5 0
9 [HRZ99] 7 * 01 09 13.43 -73 11 39.3           ~ 2 0
10 [HMC2003b] 130 * 01 09 13.74 -73 11 33.3     15.74     O7.5 5 0
11 [HRZ99] 10 * 01 09 13.90 -73 11 34.2           ~ 2 0
12 [HMC2003b] 143 * 01 09 16.08 -73 11 29.1           ~ 3 0
13 LHA 115-N 88A HII 01 24 07.823 -73 09 03.77   13.25 12.18     ~ 70 1
14 LHA 120-N 83B HII 04 54 25.2 -69 11 00           ~ 47 1
15 IRAS 04571-6627 mul 04 57 15.5 -66 23 14           ~ 52 1
16 HD 32340 Em* 04 57 16.253 -66 23 20.94   13.11 12.45 14.00   O3-O6V 77 0
17 NAME N159 Blob in LMC HII 05 40 04.2 -69 44 43           ~ 35 0

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2022.05.27-23:51:06

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