On multicomponent effects in stellar winds of stars at
extremely low metallicity

J 2003

On multicomponent effects in stellar winds of stars at extremely low metallicity

KRTIČKA, Jiří; Stanley P. OWOCKI; Jiří KUBÁT; Ross K. GALLOWAY; John C. BROWN et. al.

Základní údaje

Originální název

On multicomponent effects in stellar winds of stars at extremely low metallicity

Autoři

KRTIČKA, Jiří; Stanley P. OWOCKI; Jiří KUBÁT; Ross K. GALLOWAY a John C. BROWN

Vydání

Astronomy and Astrophysics, Les Ulis Cedex, France, EDP Sciences, 2003, 0004-6361

Další údaje

Jazyk

angličtina

Typ výsledku

Článek v odborném periodiku

Obor

10308 Astronomy

Stát vydavatele

Francie

Utajení

není předmětem státního či obchodního tajemství

Odkazy

URL

Impakt faktor

Impact factor: 3.843

Kód RIV

RIV/00216224:14310/03:00008001

Organizační jednotka

Přírodovědecká fakulta

UT WoS

000182224500029

Klíčová slova anglicky

stars: mass-loss -- stars: early-type -- stars:abundances -- stars: winds; outflows

Štítky

outflows

Příznaky

Mezinárodní význam, Recenzováno

Změněno: 5. 3. 2007 18:07, prof. Mgr. Jiří Krtička, Ph.D.

Anotace

V originále

We calculate multicomponent line-driven wind models of stars at extremely low metallicity suitable for massive first generation stars. For most of the models we find that the multicomponent wind nature is not important for either wind dynamics or for wind temperature stratification. However, for stars with the lowest metallicities we find that multicomponent effects influence the wind structure. These effects range from pure heating to possible fallback of the nonabsorbing wind component. We present a simple formula for the calculation of metallicity for which the multicomponent effects become important. We show that the importance of the multicomponent nature of winds of low metallicity stars is characterised not only by the low density of driving ions, but also by lower mass-loss rate.

Návaznosti

GA205/01/0656, projekt VaV

Název: Modelování rozsáhlých obálek horkých hvězd

GA205/02/0445, projekt VaV

Název: Fyzika horkých hvězd a hvězdných systémů s horkými složkami

Investor: Grantová agentura ČR, Fyzika horkých hvězd a hvězdných systémů s horkými složkami

Citovat

KRTIČKA, Jiří; Stanley P. OWOCKI; Jiří KUBÁT; Ross K. GALLOWAY a John C. BROWN. On multicomponent effects in stellar winds of stars at extremely low metallicity. Astronomy and Astrophysics. Les Ulis Cedex, France: EDP Sciences, 2003, roč. 35, č. 402, s. 713-718. ISSN 0004-6361.

@article{486041,
   author = {Krtička, Jiří and Owocki, Stanley P. and Kubát, Jiří and Galloway, Ross K. and Brown, John C.},
   article_location = {Les Ulis Cedex, France},
   article_number = {402},
   keywords = {stars: mass-loss -- stars: early-type -- stars:abundances -- stars: winds; outflows},
   language = {eng},
   issn = {0004-6361},
   journal = {Astronomy and Astrophysics},
   title = {On multicomponent effects in stellar winds of stars at extremely low metallicity},
   url = {http://www.edpsciences.org/articles/aa/abs/2003/17/aah4143/aah4143.html},
   volume = {35},
   year = {2003}
}

TY  - JOUR
ID  - 486041
AU  - Krtička, Jiří - Owocki, Stanley P. - Kubát, Jiří - Galloway, Ross K. - Brown, John C.
PY  - 2003
TI  - On multicomponent effects in stellar winds of stars at extremely low metallicity
JF  - Astronomy and Astrophysics
VL  - 35
IS  - 402
SP  - 713-718
EP  - 713-718
PB  - EDP Sciences
SN  - 00046361
KW  - stars: mass-loss -- stars: early-type -- stars:abundances -- stars: winds
KW  - outflows
UR  - http://www.edpsciences.org/articles/aa/abs/2003/17/aah4143/aah4143.html
N2  - We calculate multicomponent line-driven wind models of stars at extremely low metallicity suitable for massive first generation stars. For most of the models we find that the multicomponent wind nature is not important for either wind dynamics or for wind temperature stratification. However, for stars with the lowest metallicities we find that multicomponent effects influence the wind structure. These effects range from pure heating to possible fallback of the nonabsorbing wind component. We present a simple formula for the calculation of metallicity for which the multicomponent effects become important. We show that the importance of the multicomponent nature of winds of low metallicity stars is characterised not only by the low density of driving ions, but also by lower mass-loss rate.
ER  -

KRTIČKA, Jiří; Stanley P. OWOCKI; Jiří KUBÁT; Ross K. GALLOWAY a John C. BROWN. On multicomponent effects in stellar winds of stars at extremely low metallicity. \textit{Astronomy and Astrophysics}. Les Ulis Cedex, France: EDP Sciences, 2003, roč.~35, č.~402, s.~713-718. ISSN~0004-6361.

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