About: Mass and angular momentum loss of first stars via decretion disks

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	Although the first stars were likely very hot and luminous, their low or zero metallicity implies that any mass loss through winds driven by line-scattering of radiation in metal ions was likely small or non-existent. Here we examine the potential role of another possible mechanism for mass loss in these first stars, namely via decretion disks associated with near-critical rotation induced from evolution of the stellar interior. In this case the mass loss is set by the angular momentum needed to keep the stellar rotation at or below the critical rate. In present evolutionary models, that mass loss is estimated by assuming effective release from a spherical shell at the surface. Here we examine the potentially important role of viscous coupling of the decretion disk in outward angular momentum transport, emphasizing that the specific angular momentum at the outer edge of the disk can be much larger than at the stellar surface. Although the first stars were likely very hot and luminous, their low or zero metallicity implies that any mass loss through winds driven by line-scattering of radiation in metal ions was likely small or non-existent. Here we examine the potential role of another possible mechanism for mass loss in these first stars, namely via decretion disks associated with near-critical rotation induced from evolution of the stellar interior. In this case the mass loss is set by the angular momentum needed to keep the stellar rotation at or below the critical rate. In present evolutionary models, that mass loss is estimated by assuming effective release from a spherical shell at the surface. Here we examine the potentially important role of viscous coupling of the decretion disk in outward angular momentum transport, emphasizing that the specific angular momentum at the outer edge of the disk can be much larger than at the stellar surface. (en)
Title	Mass and angular momentum loss of first stars via decretion disks Mass and angular momentum loss of first stars via decretion disks (en)
skos:prefLabel	Mass and angular momentum loss of first stars via decretion disks Mass and angular momentum loss of first stars via decretion disks (en)
skos:notation	RIV/00216224:14310/10:00048546!RIV11-GA0-14310___
http://linked.open...avai/riv/aktivita	P
http://linked.open...avai/riv/aktivity	P(GA205/07/0031)
http://linked.open...vai/riv/dodaniDat	2011
http://linked.open...aciTvurceVysledku	Krtička, 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	Masarykova univerzita / Přírodovědecká fakulta
http://linked.open...dnocenehoVysledku	269764
http://linked.open...ai/riv/idVysledku	RIV/00216224:14310/10:00048546
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	stars: mass-loss; stars: evolution; stars: rotation (en)
http://linked.open.../riv/klicoveSlovo	stars: evolution stars: mass-loss stars: rotation
http://linked.open...ontrolniKodProRIV	[DEE96698FE6E]
http://linked.open...v/mistoKonaniAkce	Rio de Janeiro
http://linked.open...i/riv/mistoVydani	Cambridge
http://linked.open...i/riv/nazevZdroje	Chemical Abundances in the Universe: Connecting First Stars to Planets, IAUS 265
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	Stellar winds of first stars in the Universe
http://linked.open...UplatneniVysledku	2010
http://linked.open...iv/tvurceVysledku	Krtička, Jiří Meynet, Georges Owocki, Stanley P
http://linked.open...vavai/riv/typAkce	WRD - Světová
http://linked.open...ain/vavai/riv/wos	000280548900014
http://linked.open.../riv/zahajeniAkce	2009-01-01 (xsd:date)
number of pages	2 (xsd:int)
http://purl.org/ne...btex#hasPublisher	Cambridge University Press
https://schema.org/isbn	978-0-521-76495-7
http://localhost/t...ganizacniJednotka	14310
is http://linked.open...avai/riv/vysledek of	Mass and angular momentum loss of first stars via decretion disks Mass and angular momentum loss of first stars via decretion disks Mass and angular momentum loss of first stars via decretion disks

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