About: Weak wind effects in CNO driven winds of hot first stars

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	Context. During the evolution of rotating first stars, which initially consisted of only hydrogen and helium, CNO elements may emerge to their surface. These stars may therefore have winds that are driven only by CNO elements. Aims. We study weak wind effects (Gayley-Owocki heating and multicomponent effects) in stellar winds of first generation stars driven purely by CNO elements. Methods. We apply our NLTE multicomponent models and hydrodynamical simulations. Results. The multicomponent effects (frictional heating and decoupling) are important particularly for low metallicity winds, but they influence mass loss rate only if they cause decoupling for velocities lower than the escape velocity. The multicomponent effects also modify the feedback from first stars. As a result of the decoupling of radiatively accelerated metals from hydrogen and helium, the first low-energy cosmic ray particles are generated. Context. During the evolution of rotating first stars, which initially consisted of only hydrogen and helium, CNO elements may emerge to their surface. These stars may therefore have winds that are driven only by CNO elements. Aims. We study weak wind effects (Gayley-Owocki heating and multicomponent effects) in stellar winds of first generation stars driven purely by CNO elements. Methods. We apply our NLTE multicomponent models and hydrodynamical simulations. Results. The multicomponent effects (frictional heating and decoupling) are important particularly for low metallicity winds, but they influence mass loss rate only if they cause decoupling for velocities lower than the escape velocity. The multicomponent effects also modify the feedback from first stars. As a result of the decoupling of radiatively accelerated metals from hydrogen and helium, the first low-energy cosmic ray particles are generated. (en)
Title	Weak wind effects in CNO driven winds of hot first stars Weak wind effects in CNO driven winds of hot first stars (en)
skos:prefLabel	Weak wind effects in CNO driven winds of hot first stars Weak wind effects in CNO driven winds of hot first stars (en)
skos:notation	RIV/00216224:14310/10:00048744!RIV11-GA0-14310___
http://linked.open...avai/riv/aktivita	P
http://linked.open...avai/riv/aktivity	P(GA205/07/0031)
http://linked.open...iv/cisloPeriodika	červenec
http://linked.open...vai/riv/dodaniDat	2011
http://linked.open...aciTvurceVysledku	Votruba, Viktor Krtička, Jiří Kubát, Jiří
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Masarykova univerzita / Přírodovědecká fakulta
http://linked.open...dnocenehoVysledku	298645
http://linked.open...ai/riv/idVysledku	RIV/00216224:14310/10:00048744
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	stars: winds outflows; stars: mass-loss; stars: early-type; hydrodynamics (en)
http://linked.open.../riv/klicoveSlovo	stars: early-type stars: mass-loss hydrodynamics stars: winds outflows
http://linked.open...odStatuVydavatele	FR - Francouzská republika
http://linked.open...ontrolniKodProRIV	[860F47AEE1DE]
http://linked.open...i/riv/nazevZdroje	Astronomy and Astrophysics
http://linked.open...in/vavai/riv/obor	BN
http://linked.open...ichTvurcuVysledku	3 (xsd:int)
http://linked.open...cetTvurcuVysledku	3 (xsd:int)
http://linked.open...vavai/riv/projekt	Stellar winds of first stars in the Universe
http://linked.open...UplatneniVysledku	2010
http://linked.open...v/svazekPeriodika	516
http://linked.open...iv/tvurceVysledku	Votruba, Viktor Krtička, Jiří Kubát, Jiří
http://linked.open...ain/vavai/riv/wos	000280275400115
issn	0004-6361
number of pages	9 (xsd:int)
http://localhost/t...ganizacniJednotka	14310

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