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
2006
-
On methods for the light curves extrema determination
Astrophysics and Space Science, year: 2006, volume: 304, edition: 1
-
Short time-scale variability in the light curve of TW Draconis
Astrophysics and Space Science, year: 2006, volume: 304, edition: 1-4
-
The mass loss from hot Pop III stars
The Universe at z > 6, 26th meeting of the IAU, Joint Discussion 7, year: 2006
-
The Remarkable Eclipsing Binary TW Draconis
Binary Stars as Critical Tools and Tests in Contemporary Astrophysics, International Astronomical Union. Symposium no. 240, held 22-25 August, 2006 in Prague, Czech Republic,, year: 2006
-
The winds of hot massive first stars
Astronomy and Astrophysics, year: 2006, volume: 2006, edition: 446
2005
-
Atlas of Halpha emission lines and V light curves of 30 carbon Miras
Contributions of the Astronomical Observatory Skalnaté Pleso, year: 2005, volume: 35, edition: 1
-
Challenges to the theories of B stars circumstellar environment
Publ. Astron. Inst. Czech, year: 2005
-
Light variations and angular momentum loss from the He-strong magnetic chemically peculiar star HD 37776
Active OB-Stars: Laboratories for Stellare and Circumstellar Physics, ASP Conference Series, Vol. 361, Proceedings of the conference held 2005 at Hokkai-Gakuen University, Sapporo, Japan. Edited by S. Stefl, S. P. Owocki, and A. T. Okazaki, year: 2005
-
Light Variations of the Anomalous Central Star of Planetary Nebula Sh 2-71
Active OB-Stars: Laboratories for Stellare and Circumstellar Physics, Proceedings of the conference held 29 August - 2 September, 2005 at Hokkai-Gakuen University, Sapporo, Japan, year: 2005
-
Mass-Loss and Multicomponent Flow from Central Stars of Planetary Nebulae
14th European Workshop on White Dwarfs, year: 2005