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dc.contributor.author
Araya, I.
dc.contributor.author
Curé, M.
dc.contributor.author
ud-Doula, A.
dc.contributor.author
Santillán, A.
dc.contributor.author
Cidale, Lydia Sonia
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dc.date.available
2019-09-02T13:59:20Z
dc.date.issued
2018-04
dc.identifier.citation
Araya, I.; Curé, M.; ud-Doula, A.; Santillán, A.; Cidale, Lydia Sonia; Co-existence and switching between fast and Ω-slow wind solutions in rapidly rotating massive stars; Wiley Blackwell Publishing, Inc; Monthly Notices of the Royal Astronomical Society; 477; 1; 4-2018; 755-765
dc.identifier.issn
0035-8711
dc.identifier.uri
http://hdl.handle.net/11336/82696
dc.description.abstract
Most radiation-driven winds of massive stars can be modelled with m-CAK theory, resulting in the so-called fast solution. However, the most rapidly rotating stars among them, especially when the rotational speed is higher than ~75 per cent of the critical rotational speed, can adopt a different solution, the so-called Ω-slow solution, characterized by a dense and slow wind. Here, we study the transition region of the solutions where the fast solution changes to the Ω-slow solution. Using both time-steady and time-dependent numerical codes, we study this transition region for various equatorial models of B-type stars. In all cases, in a certain range of rotational speeds we find a region where the fast and the Ω-slow solution can coexist. We find that the type of solution obtained in this co-existence region depends stongly on the initial conditions of our models. We also test the stability of the solutions within the co-existence region by performing base-density perturbations in the wind. We find that under certain conditions, the fast solution can switch to the Ω-slow solution, or vice versa. Such solution-switching may be a possible contributor of material injected into the circumstellar environment of Be stars, without requiring rotational speeds near critical values.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Wiley Blackwell Publishing, Inc
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dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Hydrodynamics
dc.subject
Outflows
dc.subject
Stars: Early-Type
dc.subject
Stars: Rotation
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Stars: Winds
dc.subject.classification
Astronomía
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dc.subject.classification
Ciencias Físicas
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dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
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dc.title
Co-existence and switching between fast and Ω-slow wind solutions in rapidly rotating massive stars
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2019-08-28T17:57:46Z
dc.journal.volume
477
dc.journal.number
1
dc.journal.pagination
755-765
dc.journal.pais
Reino Unido
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dc.journal.ciudad
Londres
dc.description.fil
Fil: Araya, I.. Universidad Mayor; Chile. Universidad de Valparaiso; Chile
dc.description.fil
Fil: Curé, M.. Universidad de Valparaiso; Chile
dc.description.fil
Fil: ud-Doula, A.. Université de Liège; Bélgica. Pennsylvania State University;
dc.description.fil
Fil: Santillán, A.. Universidad Nacional Autónoma de México; México
dc.description.fil
Fil: Cidale, Lydia Sonia. Universidad de Valparaiso; Chile. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica La Plata; Argentina
dc.journal.title
Monthly Notices of the Royal Astronomical Society
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dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1093/mnras/sty678
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://academic.oup.com/mnras/article/477/1/755/4975263
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