Studies of massive stars in the Magellanic Clouds. I - New spectral classifications of OB types in the LMC

Abstract

view Abstract Citations (121) References (46) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Studies of massive stars in the Magellanic Clouds. I. New spectral classifications of OB types in the LMC. Conti, P. S. ; Garmany, C. D. ; Massey, P. Abstract We present new split spectral types for 191 O and B stars in the LMC previously having only objective prism data. The spectroscopic and photometric data on the LMC O stars are not yet complete, but we are able to discuss the intrinsic colors and the distance modulus of the LMC. We find that the latter is 18.3 ± 0.3 both from spectroscopic parallax and ZAMS fitting, somewhat smaller than the canonical value of 18.6 and closer to the Schommer et al. (1984) value of 18.2. The intrinsic (U - B)0, (B - V)0 of the O stars hardly differ among themselves and are similar to the values of the earliest B main- sequence stars. This is the first paper in a series on the massive-star content of the Magellanic Clouds; ultimately we plan to derive the massive-star formation rates and initial mass functions directly. Publication: The Astronomical Journal Pub Date: July 1986 DOI: 10.1086/114133 Bibcode: 1986AJ.....92...48C Keywords: Early Stars; Magellanic Clouds; Stellar Spectra; Supermassive Stars; Astronomical Catalogs; B Stars; Hertzsprung-Russell Diagram; O Stars; Stellar Color; Astrophysics full text sources ADS | data products SIMBAD (244) NED (2) Related Materials (1) Part 2: 1987AJ.....93.1070G