Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999a%26a...352l..31h&link_type=abstract
Astronomy and Astrophysics, v.352, p.L31-L35 (1999)
Astronomy and Astrophysics
Astrophysics
10
Line: Formation, Line: Profiles, Radiative Transfer, Stars: Circumstellar Matter, Stars: Emission-Line, Be
Scientific paper
We present a spectroscopic study of early type emission line stars in the field of the young open SMC cluster NGC 330 which have been identified as Be stars by CCD imaging photometry by Grebel et al. (\cite{g1}). 18 of the 20 program stars investigated can be confirmed to show Balmer emission lines superimposed on an early type spectrum. Two new Be stars in the field of NGC 330 have been detected. Hα emission equivalent width, FWHM and profile shapes (as far as resolved) do not differ from galactic Be stars, hence we suggest that rotation axis of Be stars in NGC 330 are not aligned, rather they are distributed randomly. Quantitative spectral analysis for Be40 and Be59 results in Tmathrm {eff}=18 000+/-1 500 K, log g=3.3+/-0.2 and Tmathrm {eff}=17 000+/-1 500 K, log g=3.1+/-0.2 respectively. Based on observations collected during the commissioning~1 of FORS1 at ESO, VLT observatory, Paranal, Chile
Appenzeller Immo
Gassler Wolfgang
Hummel Wolfgang
Muschielok Bernard
Rupprecht Gero
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