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CNO-driven winds of hot first stars
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SYSNO ASEP 0321955 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title CNO-driven winds of hot first stars Title Hvězdný vítr prvních hvězd urychlovaný CNO prvky Author(s) Krtička, J. (CZ)
Kubát, Jiří (ASU-R) RID, ORCIDSource Title Astronomy & Astrophysics. - : EDP Sciences - ISSN 0004-6361
Roč. 493, č. 2 (2009), s. 585-593Number of pages 9 s. Language eng - English Country FR - France Keywords stars winds ; outflows ; hydrodynamics Subject RIV BN - Astronomy, Celestial Mechanics, Astrophysics R&D Projects GA205/07/0031 GA ČR - Czech Science Foundation (CSF) CEZ AV0Z10030501 - ASU-R (2005-2011) UT WOS 000262601300027 DOI 10.1051/0004-6361:200810208 Annotation We study the properties of such stellar winds and discuss their influence on the surrounding environment. We show that, while the studied stars do not have any wind driven purely by hydrogen and helium, CNO driven winds exist in more luminous stars. On the other hand, for very hot stars, CNO elements are too ionized to drive a wind. In most cases the derived mass-loss rate is much less than calculated with solar mixture of elements. This is because wind mass-loss rate in present hot stars is dominated by elements heavier than CNO. We conclude that, until a sufficient amount of these elements is created, the influence of line-driven winds is relatively small on the evolution of hot stars. Workplace Astronomical Institute Contact Radka Svašková, bibl@asu.cas.cz, Tel.: 323 620 326 Year of Publishing 2009
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