Abstract
view Abstract Citations References Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Spectroscopic Discriminant for O-Type Star Clusters. Hiltner, W. A. ; Morgan, W. W. Abstract Some 20 years ago it was noticed at the Yerkes Observatory that the brightest stars in the Orion Nebula cluster possessed unusually strong and broad hydrogen lines for their spectral types; the effect is most clearly visible at H~. A similar phenomenon has now been observed, on McDonald spectrograms, for a number of early B stars in the cluster associated with M8, which has been investigated by Merle F. Walker at the Lick Observatory. It seems possible that the abnormally strong hydrogen lines may be a discriminant for very young 0-type clusters. Publication: The Astronomical Journal Pub Date: 1963 DOI: 10.1086/109039 Bibcode: 1963AJ.....68Q.281H full text sources ADS |
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