Comoving frame models of hot star winds II. Reduction of O star wind mass-loss rates in global models

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F17%3A00482625" target="_blank" >RIV/67985815:_____/17:00482625 - isvavai.cz</a>

Alternative codes found

RIV/00216224:14310/17:00095040

Result on the web

<a href="http://dx.doi.org/10.1051/0004-6361/201730723" target="_blank" >http://dx.doi.org/10.1051/0004-6361/201730723</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1051/0004-6361/201730723" target="_blank" >10.1051/0004-6361/201730723</a>

Result language

angličtina

Original language name

Comoving frame models of hot star winds II. Reduction of O star wind mass-loss rates in global models

Original language description

We calculate global (unified) wind models of main-sequence, giant, and supergiant O stars from our Galaxy. The models are calculated by solving hydrodynamic, kinetic equilibrium (also known as NLTE) and comoving frame (CMF) radiative transfer equations from the (nearly) hydrostatic photosphere to the supersonic wind. For given stellar parameters, our models predict the photosphere and wind structure and in particular the wind mass-loss rates without any free parameters. Our predicted mass-loss rates are by a factor of 2-5 lower than the commonly used predictions. A possible cause of the difference is abandoning of the Sobolev approximation for the calculation of the radiative force, because our models agree with predictions of CMF NLTE radiative transfer codes. Our predicted mass-loss rates agree nicely with the mass-loss rates derived from observed near-infrared and X-ray line profiles and are slightly lower than mass-loss rates derived from combined UV and H alpha diagnostics.

Czech name

—

Czech description

—

Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10308 - Astronomy (including astrophysics,space science)

Project

<a href="/en/project/GA13-10589S" target="_blank" >GA13-10589S: Mass loss in hot massive stars</a><br>

Continuities

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

Publication year

2017

Confidentiality

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

Name of the periodical

Astronomy & Astrophysics

ISSN

1432-0746

e-ISSN

—

Volume of the periodical

606

Issue of the periodical within the volume

October

Country of publishing house

FR - FRANCE

Number of pages

12

Pages from-to

"A31/1"-"A31/12"

UT code for WoS article

000412876000001

EID of the result in the Scopus database

2-s2.0-85031826065