About: Populations of rotating stars II. Rapid rotators and their link to Be-type stars

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About: Populations of rotating stars II. Rapid rotators and their link to Be-type stars 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)

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	Context. Even though it is broadly accepted that single Be stars are rapidly rotating stars surrounded by a flat rotating circumstellar disk, there is still a debate about how fast these stars rotate and also about the mechanisms involved in the angular-momentum and mass input in the disk. Aims. We study the properties of stars that rotate near their critical-rotation rate and investigate the properties of the disks formed by equatorial mass ejections. Methods. We used the most recent Geneva stellar evolutionary tracks for rapidly rotating stars that reach the critical limit and used a simple model for the disk structure. Results. We obtain that for a 9 M-circle dot star at solar metallicity, the minimum average velocity during the main-sequence (MS) phase to reach the critical velocity is around 330 km s(-1), whereas it would be 390 km s(-1) at the metallicity of the Small Magellanic Cloud (SMC). Context. Even though it is broadly accepted that single Be stars are rapidly rotating stars surrounded by a flat rotating circumstellar disk, there is still a debate about how fast these stars rotate and also about the mechanisms involved in the angular-momentum and mass input in the disk. Aims. We study the properties of stars that rotate near their critical-rotation rate and investigate the properties of the disks formed by equatorial mass ejections. Methods. We used the most recent Geneva stellar evolutionary tracks for rapidly rotating stars that reach the critical limit and used a simple model for the disk structure. Results. We obtain that for a 9 M-circle dot star at solar metallicity, the minimum average velocity during the main-sequence (MS) phase to reach the critical velocity is around 330 km s(-1), whereas it would be 390 km s(-1) at the metallicity of the Small Magellanic Cloud (SMC). (en)
Title	Populations of rotating stars II. Rapid rotators and their link to Be-type stars Populations of rotating stars II. Rapid rotators and their link to Be-type stars (en)
skos:prefLabel	Populations of rotating stars II. Rapid rotators and their link to Be-type stars Populations of rotating stars II. Rapid rotators and their link to Be-type stars (en)
skos:notation	RIV/00216224:14310/13:00067018!RIV14-GA0-14310___
http://linked.open...avai/predkladatel	Přírodovědecká fakulta
http://linked.open...avai/riv/aktivita	P
http://linked.open...avai/riv/aktivity	P(GA205/08/0003)
http://linked.open...iv/cisloPeriodika	květen
http://linked.open...vai/riv/dodaniDat	2014
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	97205
http://linked.open...ai/riv/idVysledku	RIV/00216224:14310/13:00067018
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	stars: general; stars: evolution; stars: rotation; stars: emission-line; Be; stars: mass-loss (en)
http://linked.open.../riv/klicoveSlovo	Be stars: emission-line stars: evolution stars: mass-loss stars: rotation stars: general
http://linked.open...odStatuVydavatele	FR - Francouzská republika
http://linked.open...ontrolniKodProRIV	[08942339F588]
http://linked.open...i/riv/nazevZdroje	ASTRONOMY & ASTROPHYSICS
http://linked.open...in/vavai/riv/obor	BN
http://linked.open...ichTvurcuVysledku	1 (xsd:int)
http://linked.open...cetTvurcuVysledku	7 (xsd:int)
http://linked.open...vavai/riv/projekt	Mass-loss rate predictions for hot stars
http://linked.open...UplatneniVysledku	2013
http://linked.open...v/svazekPeriodika	553
http://linked.open...iv/tvurceVysledku	Krtička, Jiří Meynet, Georges Georgy, C. Granada, A. Ekstroem, S. Maeder, A. Owocki, S.
http://linked.open...ain/vavai/riv/wos	000319858700025
issn	0004-6361
number of pages	14 (xsd:int)
http://bibframe.org/vocab/doi	10.1051/0004-6361/201220559
http://localhost/t...ganizacniJednotka	14310

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