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2012MNRAS.425..355R - Mon. Not. R. Astron. Soc., 425, 355-404 (2012/September-1)
Emission-line stars discovered in the UKST hα survey of the large Magellanic cloud – I. Hot stars.
REID W.A. and PARKER Q.A.
Abstract (from CDS):
Confirmed emission-line stars have been assigned an underlying spectral classification through cross-correlation against 131 absorption line template spectra covering the range O1–F8. We confirm 111 previously identified emission-line stars and 64 previously known variable stars with spectral types hotter than F8. The majority of hot stars identified (518 stars or 89percent) are of class B. Of all the hot emission-line stars in classes B–F, 130 or 22percent are type B[e], characterized by the presence of forbidden emission lines such as [SII], [NII] and [OII]. We report on the physical location of these stars with reference to possible contamination from ambient HII emission. Only 13 of the emission-line stars require additional high-resolution spectroscopic observations in order to assign a spectroscopic classification. They have nonetheless been added to the catalogue.
Along with flux calibration of the Hα emission, we provide the first Hα luminosity function for selected sub-samples after correction for any possible nebula or ambient contamination. We find a moderate correlation between the intensity of Hα emission and the V magnitude of the central star based on SuperCOSMOS magnitudes and Optical Gravitational Lensing Experiment (OGLE)-II photometry where possible. Cool stars from classes G–S, with and without strong Hα emission, will be the focus of Part II in this series.
Abstract Copyright: 2012 The Authors Monthly Notices of the Royal Astronomical Society 2012 RAS
Journal keyword(s): line: profiles - surveys - stars: emission-line, Be - stars: kinematics and dynamics - stars: rotation - Magellanic Clouds
VizieR on-line data: <Available at CDS (J/MNRAS/425/355): tablea1.dat tablea2.dat>
Simbad objects: 590