Project information
Circumstellar envelopes of hot stars
- Project Identification
- GA205/04/1267
- Project Period
- 1/2004 - 12/2006
- Investor / Pogramme / Project type
-
Czech Science Foundation
- Standard Projects
- MU Faculty or unit
- Faculty of Science
- Keywords
- astrophysics, stars, hydrodynamics, radiation transfer
- Cooperating Organization
-
Astronomical Institute of the ASCR, v. v. i.
- Responsible person doc. RNDr. Jiří Kubát, CSc.
Circumstellar envelopes of hot stars influence the stellar spectrum and in particular also the stellar evolution. The solution of proposed project will contribute to the understanding of both mentioned relationships. This is why we plan to calculatedetai led models of circumstellar envelopes. We plan to develop more advanced methods on the basis of existing model atmospheres, solution of radiative transfer equation in moving media, and multicomponent stellar wind models. Detailed properties of thesecircu mstellar envelopes will be calculated using mentioned sophisticated models, especially the mass-loss rates. Calculated spectra will be compared with the observed ones both in optical and ultraviolet region. Optical spectra will be acquired usingOndoejov 2m telescope and ultraviolet spectra will be extracted from internet IUE database. More exact wind parameters (mass-loss rates and terminal velocites) will be the output of this part of the project.
Publications
Total number of publications: 30
2008
-
The Influence of X-ray Emission on the Stellar Wind of O Stars
Mass Loss from Stars and the Evolution of Stellar Clusters, year: 2008
2007
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Hot star wind models with new solar abundances
Astronomy and Astrophysics, year: 2007, volume: 2007, edition: 464
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On-line database of photometric observations of magnetic chemically peculiar stars
Astronomische Nachrichten, year: 2007, volume: 328, edition: 1
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On-line database of photometric observations of magnetic chemically peculiar stars
Physics of Magnetic Stars, year: 2007
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Radiative force and circumstellar disks
Active OB-Stars: Laboratories for Stellar & Circumstellar Physics, S. Štefl, S. P. Owocki, & A. T. Okazaki eds., ASP Conf. Ser. Vol. 361, year: 2007
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Radiatively Driven Winds of OB Stars - from Micro to Macro
Active OB-Stars: Laboratories For Stellar and Circumstellar Physics, year: 2007
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The ZOO of uvby and Hp light curves of magnetic chemically peculiar stars
Physics of Magnetic Stars, year: 2007
2006
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Mass Loss from Massive Zero-Metallicity Stars
Stellar Evolution at Low Metallicity: Mass Loss, Explosions, year: 2006
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Multicomponent radiatively driven stellar winds IV. On the helium decoupling in the wind of sigma Ori E
Astronomy and Astrophysics, year: 2006, volume: 460, edition: 1
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NLTE wind models for SMC stars
Stellar Evolution at Low Metallicity: Mass Loss, Explosions, Cosmology, year: 2006