The Progenitor Masses of Wolf-Rayet Stars and Luminous Blue Variables Determined from Cluster Turnoffs. I. Results from 19 OB Associations in the Magellanic Clouds

2000 ◽  
Vol 119 (5) ◽  
pp. 2214-2241 ◽  
Author(s):  
Philip Massey ◽  
Elizabeth Waterhouse ◽  
Kathleen DeGioia-Eastwood
Keyword(s):  
Magellanic Clouds ◽  
Luminous Blue Variables ◽  
Ob Associations

29. Stellar Spectra (Spectres Stellaires)

1991 ◽  
Vol 21 (1) ◽  
pp. 309-326
Keyword(s):  
Milky Way ◽  
Massive Stars ◽  
Magellanic Clouds ◽  
Dynamical Interaction ◽  
Stellar Spectra ◽  
Luminous Blue Variables ◽  
Classical Novae ◽  
Giant Stars ◽  
Red Giant ◽  
Sydney Australia

In the triennium under review, from the late second half of 1987 to the early second half of 1990, Commission 29 has sponsored or cosponsored the following IAU Conferences: Coll. No. 106, “Evolution of Peculiar Red Giant Stars,” Bloomington, Indiana, July 1988; CoU. No. 114, “White Dwarfs,” Hanover, New Hamsphire, August 1988; Coll. No. 113, “Physics of Luminous Blue Variables,” Val Morin, Quebec, August 1988; Coll. No. 122, “Physics of Classical Novae,” Madrid, Spain, June 1989; Symp. No. 143, “Wolf-Rayet Stars and Interrelations with Other Massive Stars in Galaxies,” Denpasar, Indonesia, June 1990; Symp. No 148, “The Magellanic Clouds and their Dynamical Interaction with the Milky Way,” Sydney, Australia, July 1990; Symp. No. 145, “Evolution of Stars: the Photospheric Abundance Connection,” Druzba, Bulgaria. August 1990.

A Photometric Study of Two OB Associations in the Magellanic Clouds

1986 ◽  
Vol 98 ◽  
pp. 1102
Author(s):  
C. D. Garmany ◽  
P. Massey ◽  
K. de Gioia-Eastwood
Keyword(s):  
Magellanic Clouds ◽  
Photometric Study ◽  
Ob Associations

scholarly journals Superbubbles in the Magellanic Clouds

1999 ◽  
Vol 190 ◽  
pp. 78-83 ◽  
Author(s):  
M. S. Oey
Keyword(s):  
Magellanic Clouds ◽  
Stellar Winds ◽  
Stellar Content ◽  
Interstellar Gas ◽  
Star Forming ◽  
Gas Phases ◽  
Ob Associations ◽  
Shell Forming ◽  
The Relationship

Superbubbles that result from the stellar winds and supernovae of OB associations probably play a fundamental role in the structure and energetics of the ISM in star-forming galaxies. Their influence may also dominate the relationship between the different interstellar gas phases. How do superbubbles form and evolve? How do they affect the local and global ISM? The Magellanic Clouds provide a superior opportunity to study this shell-forming activity, since both stellar content and gaseous structure can be examined in detail. Here, the results of recent studies of superbubbles in the Magellanic Clouds are reviewed.

scholarly journals Infrared properties of active OB stars in the Magellanic Clouds from the Spitzer SAGE survey

2010 ◽  
Vol 6 (S272) ◽  
pp. 254-259
Author(s):  
Alceste Z. Bonanos ◽  
Danny J. Lennon ◽  
Derck L. Massa ◽  
Marta Sewilo ◽  
Fabian Köhlinger ◽  
...  
Keyword(s):  
Magellanic Clouds ◽  
Spectral Energy ◽  
Be Stars ◽  
Energy Distributions ◽  
Photometric Variability ◽  
B Stars ◽  
Ob Stars ◽  
Luminous Blue Variables ◽  
Red Supergiants ◽  
Be Star

AbstractWe present a study of the infrared properties of 4922 spectroscopically confirmed massive stars in the Large and Small Magellanic Clouds, focusing on the active OB star population. Besides OB stars, our sample includes yellow and red supergiants, Wolf-Rayet stars, Luminous Blue Variables (LBVs) and supergiant B[e] stars. We detect a distinct Be star sequence, displaced to the red, and find a higher fraction of Oe and Be stars among O and early-B stars in the SMC, respectively, when compared to the LMC, and that the SMC Be stars occur at higher luminosities. We also find photometric variability among the active OB population and evidence for transitions of Be stars to B stars and vice versa. We furthermore confirm the presence of dust around all the supergiant B[e] stars in our sample, finding the shape of their spectral energy distributions (SEDs) to be very similar, in contrast to the variety of SED shapes among the spectrally variable LBVs.

scholarly journals Luminous blue variable stars in the Magellanic Clouds

1991 ◽  
Vol 148 ◽  
pp. 266-266
Author(s):  
Bernhard Wolf
Keyword(s):  
Spectral Type ◽  
Variable Stars ◽  
Magellanic Clouds ◽  
Instability Strip ◽  
Vertical Strip ◽  
Luminous Blue Variables ◽  
Metal Abundance ◽  
Visual Range ◽  
Luminous Blue Variable

The main characteristics of the luminous blue variables (LBVs) in the MCs with S Dor-type outbursts are reviewed. At quiescence they are luminous OB supergiants occupying an inclined instability strip in the HRD. The most luminous LBVs are the hottest ones. During outburst, dense envelopes are expelled of equivalent spectral-type middle A to early F. LBVs occupy at maximum a vertical strip in the HRD at a temperature of about 8000K. The observed amplitudes in the visual range increase from 1 mag (e.g. R71; T=14500K at quiescence) to 2.5 mag (e.g. R127; T=33000K at quiescence). The existence of an amplitude-luminosity relation is suggested which can be used to derive extragalactic distances, if calibrated with the LBVs of the LMC. Whereas four LBVs are known to be members of the LMC, none is known in the SMC. This could be a consequence of the lower metal abundance in this galaxy.

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