Multicomponent radiatively driven stellar winds  III.
Radiative-acoustic waves in a two-component wind

J 2002

Multicomponent radiatively driven stellar winds III. Radiative-acoustic waves in a two-component wind

KRTIČKA, Jiří a Jiří KUBÁT

Základní údaje

Originální název

Multicomponent radiatively driven stellar winds III. Radiative-acoustic waves in a two-component wind

Autoři

KRTIČKA, Jiří (203 Česká republika, garant) a Jiří KUBÁT (203 Česká republika)

Vydání

Astronomy and Astrophysics, Les Ulis Cedex, France, EDP Sciences, 2002, 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: 3.781

Kód RIV

RIV/00216224:14310/02:00006097

Organizační jednotka

Přírodovědecká fakulta

Klíčová slova anglicky

stars: mass-loss -- stars: early-type -- hydrodynamics -- instabilities -- waves

Příznaky

Mezinárodní význam, Recenzováno

Změněno: 5. 3. 2007 18:08, prof. Mgr. Jiří Krtička, Ph.D.

Anotace

V originále

We study the stability of isothermal two-component radiatively driven stellar winds to one-dimensional perturbations larger than the Sobolev length, and radiative-acoustic waves in such stellar winds. We perform linear perturbation analysis in comoving fluid-frames of individual components and obtain the dispersion relation in the common fluid frame. For high density winds the difference between velocities of both components is relatively small and the wind is stable for radiative-acoustic waves discovered originally by Abbott, in accordance with the previous studies of the one-component wind. However, for such high density winds we found new types of waves, including a special case of "frozen-in" wavy patterns. On the other hand, if the velocity difference between wind components is sufficiently large (for low density winds) then the multicomponent stellar wind is unstable even for large-scale perturbations and ion runaway occurs. Thus, isothermal two-component stationary solutions of the radiatively line-driven stellar wind with an abrupt lowering of the velocity gradient are unstable.

Návaznosti

GA205/01/0656, projekt VaV

Název: Modelování rozsáhlých obálek horkých hvězd

Citovat

KRTIČKA, Jiří a Jiří KUBÁT. Multicomponent radiatively driven stellar winds III. Radiative-acoustic waves in a two-component wind. Astronomy and Astrophysics. Les Ulis Cedex, France: EDP Sciences, 2002, roč. 35, č. 388, s. 531-549. ISSN 0004-6361.

@article{404007,
   author = {Krtička, Jiří and Kubát, Jiří},
   article_location = {Les Ulis Cedex, France},
   article_number = {388},
   keywords = {stars: mass-loss -- stars: early-type -- hydrodynamics -- instabilities -- waves},
   language = {eng},
   issn = {0004-6361},
   journal = {Astronomy and Astrophysics},
   title = {Multicomponent radiatively driven stellar winds III. Radiative-acoustic waves in a two-component wind},
   url = {http://www.edpsciences.com/articles/aa/abs/2002/23/aa2170/aa2170.html},
   volume = {35},
   year = {2002}
}

TY  - JOUR
ID  - 404007
AU  - Krtička, Jiří - Kubát, Jiří
PY  - 2002
TI  - Multicomponent radiatively driven stellar winds III. Radiative-acoustic waves in a two-component wind
JF  - Astronomy and Astrophysics
VL  - 35
IS  - 388
SP  - 531
EP  - 531
PB  - EDP Sciences
SN  - 00046361
KW  - stars: mass-loss -- stars: early-type -- hydrodynamics -- instabilities -- waves
UR  - http://www.edpsciences.com/articles/aa/abs/2002/23/aa2170/aa2170.html
N2  - We study the stability of isothermal two-component radiatively driven stellar winds to one-dimensional perturbations larger than the Sobolev length, and radiative-acoustic waves in such stellar winds. We perform linear perturbation analysis in comoving fluid-frames of individual components and obtain the dispersion relation in the common fluid frame. For high density winds the difference between velocities of both components is relatively small and the wind is stable for radiative-acoustic waves discovered originally by Abbott, in accordance with the previous studies of the one-component wind. However, for such high density winds we found new types of waves, including a special case of "frozen-in" wavy patterns. On the other hand, if the velocity difference between wind components is sufficiently large (for low density winds) then the multicomponent stellar wind is unstable even for large-scale perturbations and ion runaway occurs. Thus, isothermal two-component stationary solutions of the radiatively line-driven stellar wind with an abrupt lowering of the velocity gradient are unstable.
ER  -

KRTIČKA, Jiří a Jiří KUBÁT. Multicomponent radiatively driven stellar winds III. Radiative-acoustic waves in a two-component wind. \textit{Astronomy and Astrophysics}. Les Ulis Cedex, France: EDP Sciences, 2002, roč.~35, č.~388, s.~531-549. ISSN~0004-6361.

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