CNO driven winds of hot first stars

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F09%3A00029216" target="_blank" >RIV/00216224:14310/09:00029216 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

CNO driven winds of hot first stars

Popis výsledku v původním jazyce

We show that hot first stars do not have any wind driven purely by hydrogen or helium. However, during the evolution of these stars the CNO elements may emerge on their surfaces due to the mixing processes. Contrary to hydrogen and helium, these elementsare able to drive a stellar wind. Consequently, evolved first stars may have winds driven purely by CNO elements. We study the properties of such stellar winds for different abundance of CNO elements and discuss their influence on the surrounding environment. We show that CNO driven winds exist in more luminuous stars. Moreover, for very hot stars CNO elements are too much ionized to drive a wind. In most cases the derived mass-loss rate is smaller than that calculated with solar mixture of elements. This is connected with the fact that in the present hot stars heavier elements (as iron) are the most important element that influence the wind mass-loss rate.

Název v anglickém jazyce

CNO driven winds of hot first stars

Popis výsledku anglicky

We show that hot first stars do not have any wind driven purely by hydrogen or helium. However, during the evolution of these stars the CNO elements may emerge on their surfaces due to the mixing processes. Contrary to hydrogen and helium, these elementsare able to drive a stellar wind. Consequently, evolved first stars may have winds driven purely by CNO elements. We study the properties of such stellar winds for different abundance of CNO elements and discuss their influence on the surrounding environment. We show that CNO driven winds exist in more luminuous stars. Moreover, for very hot stars CNO elements are too much ionized to drive a wind. In most cases the derived mass-loss rate is smaller than that calculated with solar mixture of elements. This is connected with the fact that in the present hot stars heavier elements (as iron) are the most important element that influence the wind mass-loss rate.

Druh

D - Stať ve sborníku

CEP obor

BN - Astronomie a nebeská mechanika, astrofyzika

OECD FORD obor

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Projekt

<a href="/cs/project/GA205%2F07%2F0031" target="_blank" >GA205/07/0031: Hvězdné větry prvních hvězd ve vesmíru</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2009

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

Low-Metallicity Star Formation: From the First Stars to Dwarf Galaxies

ISBN

978-0-521-88986-5

ISSN

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e-ISSN

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Počet stran výsledku

1

Strana od-do

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Název nakladatele

Cambridge University Press

Místo vydání

Cambridge, Velka Britanie

Místo konání akce

Rapallo, Italie

Datum konání akce

1. 1. 2008

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

000262601300027