Multicomponent radiatively driven stellar winds I.Nonisothermal
three-component wind of hot B stars

J 2001

Multicomponent radiatively driven stellar winds I.Nonisothermal three-component wind of hot B stars

KRTIČKA, Jiří and Jiří KUBÁT

Basic information

Original name

Multicomponent radiatively driven stellar winds I.Nonisothermal three-component wind of hot B stars

Authors

KRTIČKA, Jiří (203 Czech Republic, guarantor) and Jiří KUBÁT

Edition

Astronomy and Astrophysics, Les Ulis Cedex, France, EDP Sciences, 2001, 0004-6361

Other information

Language

English

Type of outcome

Článek v odborném periodiku

Field of Study

10308 Astronomy

Country of publisher

France

Confidentiality degree

není předmětem státního či obchodního tajemství

References:

URL

Impact factor

Impact factor: 2.790 in 2000

RIV identification code

RIV/00216224:14310/01:00004112

Organization unit

Faculty of Science

Keywords in English

hydrodynamics -- stars: mass-loss -- stars: early-type -- stars: winds -- stars: individual: tau Sco

Abstract

V originále

We computed models of a three-component nonisothermal radiatively driven stellar wind for different spectral types of hot B stars. We showed that friction heats mainly the outer parts of the wind and the modified temperature stratification leads to a decrease of the outflow velocity. Contrary to the isothermal case, even the possibility of decoupling of radiatively absorbing ions and (major) nonabsorbing component is excluded for a realistic form of the driving force. Regardless of the actual form of the driving force, we derived general conditions under which decoupling of a stellar wind may occur. We demonstrated that the possibility of decoupling is closely related to the functional dependence of the driving force and to the ratio of the densities of individual components. We discuss several consequences of a multifluid phenomenon in hot star winds, particularly metallicity effects and the implications of possible helium decoupling on chemically peculiar stars. We propose an explanation of the low terminal velocity of tau Sco based on frictional heating.

Links

GA205/01/0656, research and development project

Name: Modelování rozsáhlých obálek horkých hvězd

Citovat

KRTIČKA, Jiří and Jiří KUBÁT. Multicomponent radiatively driven stellar winds I.Nonisothermal three-component wind of hot B stars. Astronomy and Astrophysics. Les Ulis Cedex, France: EDP Sciences, 2001, vol. 35, No 369, p. 222-238. ISSN 0004-6361.

@article{358891,
   author = {Krtička, Jiří and Kubát, Jiří},
   article_location = {Les Ulis Cedex, France},
   article_number = {369},
   keywords = {hydrodynamics -- stars: mass-loss -- stars: early-type -- stars: winds -- stars: individual: tau Sco},
   language = {eng},
   issn = {0004-6361},
   journal = {Astronomy and Astrophysics},
   title = {Multicomponent radiatively driven stellar winds I.Nonisothermal three-component wind of hot B stars},
   url = {http://www.edpsciences.com/articles/aa/abs/2001/13/aa10271/aa10271.html},
   volume = {35},
   year = {2001}
}

TY  - JOUR
ID  - 358891
AU  - Krtička, Jiří - Kubát, Jiří
PY  - 2001
TI  - Multicomponent radiatively driven stellar winds I.Nonisothermal three-component wind of hot B stars
JF  - Astronomy and Astrophysics
VL  - 35
IS  - 369
SP  - 222
EP  - 222
PB  - EDP Sciences
SN  - 00046361
KW  - hydrodynamics -- stars: mass-loss -- stars: early-type -- stars: winds -- stars: individual: tau Sco
UR  - http://www.edpsciences.com/articles/aa/abs/2001/13/aa10271/aa10271.html
N2  - We computed models of a three-component nonisothermal radiatively driven stellar wind for different spectral types of hot B stars. We showed that friction heats mainly the outer parts of the wind and the modified temperature stratification leads to a decrease of the outflow velocity. Contrary to the isothermal case, even the possibility of decoupling of radiatively absorbing ions and (major) nonabsorbing component is excluded for a realistic form of the driving force. Regardless of the actual form of the driving force, we derived general conditions under which decoupling of a stellar wind may occur. We demonstrated that the possibility of decoupling is closely related to the functional dependence of the driving force and to the ratio of the densities of individual components. We discuss several consequences of a multifluid phenomenon in hot star winds, particularly metallicity effects and the implications of possible helium decoupling on chemically peculiar stars. We propose an explanation of the low terminal velocity of tau Sco based on frictional heating.
ER  -

KRTIČKA, Jiří and Jiří KUBÁT. Multicomponent radiatively driven stellar winds I.Nonisothermal three-component wind of hot B stars. \textit{Astronomy and Astrophysics}. Les Ulis Cedex, France: EDP Sciences, 2001, vol.~35, No~369, p.~222-238. ISSN~0004-6361.

Detailed Information on Publication Record