About: On the importance of the wind emission to the optical continuum of OB supergiants

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

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	Context. Thermal wind emission in the form of free-free and free-bound emission is known to show up in the infrared and radio continuum of hot and massive stars. For OB supergiants with moderate mass loss rates and a wind velocity distribution with $\beta$$\simeq$ 0.8 ... 1.0, no influence of the wind to the optical continuum, i.e. for $\lambda \la$ 1.0 $\mu$m, is expected. Investigations of stellar and wind parameters of OB supergiants over the last few years suggest, however, that for many objects $\beta$ is much higher than 1.0, reaching values up to 3.5. Aims. We investigate the influence of the free-free and free-bound emission on the emerging radiation, especially at optical wavelengths, from OB supergiants having wind velocity distributions with $\beta \ge$ 1.0. Methods. For the case of a spherically symmetric, isothermal wind in local thermodynamical equilibrium (LTE) we calculate the free-free and free-bound processes and the emerging wind and total continuum spectra. Context. Thermal wind emission in the form of free-free and free-bound emission is known to show up in the infrared and radio continuum of hot and massive stars. For OB supergiants with moderate mass loss rates and a wind velocity distribution with $\beta$$\simeq$ 0.8 ... 1.0, no influence of the wind to the optical continuum, i.e. for $\lambda \la$ 1.0 $\mu$m, is expected. Investigations of stellar and wind parameters of OB supergiants over the last few years suggest, however, that for many objects $\beta$ is much higher than 1.0, reaching values up to 3.5. Aims. We investigate the influence of the free-free and free-bound emission on the emerging radiation, especially at optical wavelengths, from OB supergiants having wind velocity distributions with $\beta \ge$ 1.0. Methods. For the case of a spherically symmetric, isothermal wind in local thermodynamical equilibrium (LTE) we calculate the free-free and free-bound processes and the emerging wind and total continuum spectra. (en)
Title	On the importance of the wind emission to the optical continuum of OB supergiants On the importance of the wind emission to the optical continuum of OB supergiants (en)
skos:prefLabel	On the importance of the wind emission to the optical continuum of OB supergiants On the importance of the wind emission to the optical continuum of OB supergiants (en)
skos:notation	RIV/00216224:14310/08:00040362!RIV11-AV0-14310___
http://linked.open...avai/riv/aktivita	P Z
http://linked.open...avai/riv/aktivity	P(KJB300030701), Z(AV0Z10030501)
http://linked.open...iv/cisloPeriodika	481
http://linked.open...vai/riv/dodaniDat	2011
http://linked.open...aciTvurceVysledku	Krtička, Jiří
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Masarykova univerzita / Přírodovědecká fakulta
http://linked.open...dnocenehoVysledku	384750
http://linked.open...ai/riv/idVysledku	RIV/00216224:14310/08:00040362
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	stars: early-type -- stars: supergiants -- stars: winds outflows -- stars: mass-loss -- stars: circumstellar matter (en)
http://linked.open.../riv/klicoveSlovo	stars: early-type -- stars: supergiants -- stars: winds outflows -- stars: mass-loss -- stars: circumstellar matter
http://linked.open...odStatuVydavatele	FR - Francouzská republika
http://linked.open...ontrolniKodProRIV	[A965D8E5D416]
http://linked.open...i/riv/nazevZdroje	Astronomy and Astrophysics
http://linked.open...in/vavai/riv/obor	BN
http://linked.open...ichTvurcuVysledku	1 (xsd:int)
http://linked.open...cetTvurcuVysledku	3 (xsd:int)
http://linked.open...vavai/riv/projekt	B[e] supergiants: where is their place within the evolution of massive stars?
http://linked.open...UplatneniVysledku	2008
http://linked.open...v/svazekPeriodika	36
http://linked.open...iv/tvurceVysledku	Kraus, Michaela Krtička, Jiří Kubát, Jiří
http://linked.open...ain/vavai/riv/wos	000254515800025
http://linked.open...n/vavai/riv/zamer	Astronomie a astrofyzika
issn	0004-6361
number of pages	8 (xsd:int)
http://localhost/t...ganizacniJednotka	14310
is http://linked.open...avai/riv/vysledek of	On the importance of the wind emission to the optical continuum of OB supergiants On the importance of the wind emission to the optical continuum of OB supergiants On the importance of the wind emission to the optical continuum of OB supergiants

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