About: Macroclumping as solution of the discrepancy between Hα and P v mass loss diagnostics for O-type stars

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About: Macroclumping as solution of the discrepancy between Hα and P v mass loss diagnostics for O-type stars Goto Sponge NotDistinct Permalink

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	In a previous paper, we presented 3D Monte-Carlo calculations for the formation of scattering lines in a clumped stellar wind. In the present paper we select five O-type supergiants (from O4 to O7) and test whether the reported discrepancies can be resolved this way. Our results show that with the mass-loss rates that fit Hα (and other Balmer and He ii lines), the UV resonance lines (especially the unsaturated doublet of P v) can also be reproduced with no problem when macroclumping is taken into account. There is no need to artificially reduce the mass-loss rates or to assume a subsolar phosphorus abundance or an extremely high clumping factor, unlike what was claimed by other authors. These consistent mass-loss rates are lower by a factor of 1.3 to 2.6, compared to the mass-loss rate recipe from Vink et al. In a previous paper, we presented 3D Monte-Carlo calculations for the formation of scattering lines in a clumped stellar wind. In the present paper we select five O-type supergiants (from O4 to O7) and test whether the reported discrepancies can be resolved this way. Our results show that with the mass-loss rates that fit Hα (and other Balmer and He ii lines), the UV resonance lines (especially the unsaturated doublet of P v) can also be reproduced with no problem when macroclumping is taken into account. There is no need to artificially reduce the mass-loss rates or to assume a subsolar phosphorus abundance or an extremely high clumping factor, unlike what was claimed by other authors. These consistent mass-loss rates are lower by a factor of 1.3 to 2.6, compared to the mass-loss rate recipe from Vink et al. (en)
Title	Macroclumping as solution of the discrepancy between Hα and P v mass loss diagnostics for O-type stars Macroclumping as solution of the discrepancy between Hα and P v mass loss diagnostics for O-type stars (en)
skos:prefLabel	Macroclumping as solution of the discrepancy between Hα and P v mass loss diagnostics for O-type stars Macroclumping as solution of the discrepancy between Hα and P v mass loss diagnostics for O-type stars (en)
skos:notation	RIV/67985815:_____/13:00424407!RIV14-MSM-67985815
http://linked.open...avai/riv/aktivita	I P
http://linked.open...avai/riv/aktivity	I, P(7AMB12AR021), P(GAP209/11/1198)
http://linked.open...iv/cisloPeriodika	November
http://linked.open...vai/riv/dodaniDat	2014
http://linked.open...aciTvurceVysledku	Kubát, Jiří Šurlan, Brankica
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	Astronomický ústav AV ČR, v. v. i.
http://linked.open...dnocenehoVysledku	85662
http://linked.open...ai/riv/idVysledku	RIV/67985815:_____/13:00424407
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	stars; winds; outflows (en)
http://linked.open.../riv/klicoveSlovo	outflows winds stars
http://linked.open...odStatuVydavatele	FR - Francouzská republika
http://linked.open...ontrolniKodProRIV	[EA12FB1A7BF6]
http://linked.open...i/riv/nazevZdroje	Astronomy & Astrophysics
http://linked.open...in/vavai/riv/obor	BN
http://linked.open...ichTvurcuVysledku	2 (xsd:int)
http://linked.open...cetTvurcuVysledku	6 (xsd:int)
http://linked.open...vavai/riv/projekt	Circumstellar environment of evolved hot stars On the evolutionary stage and disk formation mechanism of B[e] stars
http://linked.open...UplatneniVysledku	2013
http://linked.open...v/svazekPeriodika	559
http://linked.open...iv/tvurceVysledku	Kubát, Jiří Šurlan, Brankica Hamann, W.-R. Oskinova, L. M. Torres, A. F. Aret, A.
http://linked.open...ain/vavai/riv/wos	000327847200130
issn	0004-6361
number of pages	17 (xsd:int)
http://bibframe.org/vocab/doi	10.1051/0004-6361/201322390

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