X-ray emission from hydrodynamical simulations in non-LTE wind models

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F09%3A00029679" target="_blank" >RIV/00216224:14310/09:00029679 - isvavai.cz</a>

Alternative codes found

RIV/67985815:_____/09:00337548

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

X-ray emission from hydrodynamical simulations in non-LTE wind models

Original language description

Hot stars are sources of X-ray emission originating in their winds. Although hydrodynamical simulations that are able to predict this X-ray emission are available, the inclusion of X-rays in stationary wind models is usually based on simplifying approximations. To improve this, we use results from time-dependent hydrodynamical simulations of the line-driven wind instability (seeded by the base perturbation) to derive the analytical approximation of X-ray emission in the stellar wind. We use this approximation in our non-LTE wind models and find that an improved inclusion of X-rays leads to a better agreement between model ionization fractions and those derived from observations. Furthermore, the slope of the LX-L relation is in better agreement with observations, however the X-ray luminosity is underestimated by a factor of three. We propose a possible solution for this discrepancy.

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

BN - Astronomy and celestial mechanics, astrophysics

OECD FORD branch

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Project

<a href="/en/project/GA205%2F08%2F0003" target="_blank" >GA205/08/0003: Mass-loss rate predictions for hot stars</a><br>

Continuities

S - Specificky vyzkum na vysokych skolach

Publication year

2009

Confidentiality

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

Name of the periodical

Astronomy and Astrophysics

ISSN

0004-6361

e-ISSN

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Volume of the periodical

Neuveden

Issue of the periodical within the volume

508

Country of publishing house

FR - FRANCE

Number of pages

8

Pages from-to

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UT code for WoS article

000273296700029

EID of the result in the Scopus database

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