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

Facets (new session)
Description
Metadata
Settings
- owl:sameAs
- Inference Rule:

About: X-ray emission from hydrodynamical wind simulations in non-LTE models Goto Sponge NotDistinct Permalink

An Entity of Type : http://linked.opendata.cz/ontology/domain/vavai/Vysledek, within Data Space : linked.opendata.cz associated with source document(s)

Attributes	Values
rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	Massive hot stars are strong sources of X-ray emission originating in their winds. Although hydrodynamical wind 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 crude approximations. To improve this we use results from time-dependent hydrodynamical simulations of the line-driven wind instability to derive an 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, albeit the X-ray luminosity is underestimated by a factor of three. We propose that a possible solution for this discrepancy is connected with the wind porosity. Massive hot stars are strong sources of X-ray emission originating in their winds. Although hydrodynamical wind 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 crude approximations. To improve this we use results from time-dependent hydrodynamical simulations of the line-driven wind instability to derive an 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, albeit the X-ray luminosity is underestimated by a factor of three. We propose that a possible solution for this discrepancy is connected with the wind porosity. (en)
Title	X-ray emission from hydrodynamical wind simulations in non-LTE models X-ray emission from hydrodynamical wind simulations in non-LTE models (en)
skos:prefLabel	X-ray emission from hydrodynamical wind simulations in non-LTE models X-ray emission from hydrodynamical wind simulations in non-LTE models (en)
skos:notation	RIV/67985815:_____/11:00372640!RIV12-AV0-67985815
http://linked.open...avai/riv/aktivita	P Z
http://linked.open...avai/riv/aktivity	P(GA205/08/0003), Z(AV0Z10030501)
http://linked.open...vai/riv/dodaniDat	2012
http://linked.open...aciTvurceVysledku	Kubát, Jiří
http://linked.open.../riv/druhVysledku	D - Článek ve sborníku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Astronomický ústav AV ČR, v. v. i.
http://linked.open...dnocenehoVysledku	241991
http://linked.open...ai/riv/idVysledku	RIV/67985815:_____/11:00372640
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	stars winds; outflows; hydrodynamics (en)
http://linked.open.../riv/klicoveSlovo	outflows stars winds hydrodynamics
http://linked.open...ontrolniKodProRIV	[E397955AFDC5]
http://linked.open...v/mistoKonaniAkce	Paris
http://linked.open...i/riv/mistoVydani	Cambridge
http://linked.open...i/riv/nazevZdroje	Active OB stars: structure, evolution, mass loss, and critical limits
http://linked.open...in/vavai/riv/obor	BN
http://linked.open...ichTvurcuVysledku	1 (xsd:int)
http://linked.open...cetTvurcuVysledku	5 (xsd:int)
http://linked.open...vavai/riv/projekt	Mass-loss rate predictions for hot stars
http://linked.open...UplatneniVysledku	2011
http://linked.open...iv/tvurceVysledku	Krtička, J. Kubát, Jiří Feldmeier, A. Hamann, W.-R. Oskinova, L. M.
http://linked.open...vavai/riv/typAkce	WRD - Světová
http://linked.open...ain/vavai/riv/wos	000294438200166
http://linked.open.../riv/zahajeniAkce	2010-07-19 (xsd:date)
http://linked.open...n/vavai/riv/zamer	Astronomie a astrofyzika
number of pages	2 (xsd:int)
http://purl.org/ne...btex#hasPublisher	Cambridge University Press
https://schema.org/isbn	978-0-521-19840-0

Faceted Search & Find service v1.16.118 as of Jun 21 2024

Alternative Linked Data Documents: ODE Content Formats:

RDF

ODATA

Microdata

About

OpenLink Virtuoso version 07.20.3240 as of Jun 21 2024, on Linux (x86_64-pc-linux-gnu), Single-Server Edition (126 GB total memory, 48 GB memory in use)
Data on this page belongs to its respective rights holders.
Virtuoso Faceted Browser Copyright © 2009-2024 OpenLink Software