Expanding Atmospheres in OB Supergiants--II
نویسندگان
چکیده
منابع مشابه
<3d> Nlte Line Formation in the Atmospheres of Red Supergiants
Red supergiants with their enormous brightness at J-band are ideal probes of cosmic chemical composition. It is therefore crucial to have realistic models of radiative transfer in their atmospheres, which will permit determination of abundances accurate to 0.15 dex, the precision attainable with future telescope facilities in galaxies as distant as tens of Mpc. Here, we study the effects of non...
متن کاملresearch publications and other research outputs The population of OB supergiants in the starburst
Context. After leaving the main sequence, massive stars undergo complex evolution, which is still poorly understood. With a population of hundreds of OB stars, the starburst cluster Westerlund 1 offers an unparallelled environment to study their evolutionary tracks. Aims. We characterise a large sample of evolved OB stars in the cluster, with the aim of determining cluster parameters and place ...
متن کاملThe population of OB supergiants in the starburst cluster Westerlund 1
Context. After leaving the main sequence, massive stars undergo complex evolution, which is still poorly understood. With a population of hundreds of OB stars, the starburst cluster Westerlund 1 offers an unparallelled environment to study their evolutionary tracks. Aims. We characterise a large sample of evolved OB stars in the cluster, with the aim of determining cluster parameters and place ...
متن کاملLarge-scale wind structures in OB supergiants: a search for rotationally modulated Hα variability
We present the results of a long-term monitoring campaign of the Hα line in a sample of bright OB-supergiants (O7.5–B9) that aims at detecting rotationally modulated changes potentially related to the existence of large-scale wind structures. A total of 22 objects were monitored during 36 nights spread over 6 months in 2001–2002. Coordinated broad-band photometric observations were also obtaine...
متن کاملOn the importance of the wind emission to the optical continuum of OB supergiants
Context. Thermal wind emission in the form of free-free and free-bound emission is known to show up in the infrared and radio continuum of hot and massive stars. For OB supergiants with moderate mass loss rates and a wind velocity distribution with β ≃ 0.8 . . . 1.0, no influence of the wind to the optical continuum, i.e. for λ <∼ 1.0 μm, is expected. Investigations of stellar and wind paramete...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 1968
ISSN: 0035-8711,1365-2966
DOI: 10.1093/mnras/141.3.329