Publications of the Astronomical Society of the Pacific, Volume 106, Issues 695-702Astronomical Society of the Pacific, 1994 |
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Page 25
... associations . These associations contain many , but by no means all , of the stars with masses greater than 15M . Most of our knowledge of the stellar content of the OB associations in our own Galaxy is surprisingly sketchy due to ...
... associations . These associations contain many , but by no means all , of the stars with masses greater than 15M . Most of our knowledge of the stellar content of the OB associations in our own Galaxy is surprisingly sketchy due to ...
Page 26
... associations and to suggest that they are young in comparison to other stars in the Galaxy ; this agreed with estimates of stellar age for O and B stars based on their luminosity . The discovery of the rapid expansion of Perseus OB2 by ...
... associations and to suggest that they are young in comparison to other stars in the Galaxy ; this agreed with estimates of stellar age for O and B stars based on their luminosity . The discovery of the rapid expansion of Perseus OB2 by ...
Page 27
... association Scorpio - Centaurus ( Blaauw 1963 ) . The careful work by Walborn ( 1973 ) on the classification of O - type stars set the stage for much subsequent interest in these most massive stars . 120 2. GALACTIC ASSOCIATIONS ...
... association Scorpio - Centaurus ( Blaauw 1963 ) . The careful work by Walborn ( 1973 ) on the classification of O - type stars set the stage for much subsequent interest in these most massive stars . 120 2. GALACTIC ASSOCIATIONS ...
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abundance additional analysis appear associations assumed Astronomical average binary blue bright calibration catalog central clouds cluster color compared correction derived detection determined discussed distance distribution dwarf eclipse effects emission errors estimate et al evidence evolution field Figure flux frame function galaxies giants given groups included increase indices less light limit lines luminosity magnitude mass mean measured MNRAS nebulae noted objects observations obtained optical orbital PASP period phase photometric pixels position possible present probably quasars range ratio reduced reference region relation relative rotation sample scale scatter secondary shown similar sources spectral spectrum standard stars stellar stellar winds suggests surface survey Table telescope temperature tion University values variability velocity wavelength X-ray