Ändra sökning
RefereraExporteraLänk till posten
Permanent länk

Direktlänk
Referera
Referensformat
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annat format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annat språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf
Winds of AGB stars: The two roles of atmospheric dust
KTH, Centra, Nordic Institute for Theoretical Physics NORDITA.
2016 (Engelska)Ingår i: Memorie della Societa Astronomica Italiana - Journal of the Italian Astronomical Society, Societa Astronomica Italiana , 2016, nr 2, s. 249-254Konferensbidrag (Refereegranskat)
Abstract [en]

The winds of AGB stars are commonly regarded as dust driven, i.e. due to radiation pressure incident on atmospheric dust grains, which are then accelerated and drag the gas along, creating an outflow. The formation of dust, however, requires some extra energy input to expand the atmosphere and push a suficient fraction of it beyond the so-called condensation radius where the radiative heating of the grains is less than the critical value. This energy injection is provided by the pulsation of the star and the standard picture is therefore that the winds of AGB stars are pulsation-aided dust-driven outflows. The present paper compares the strong- And weak/slow-wind regime. It is argued that in the latter the winds are better described as 'dust supported' rather than dust driven. That is, the gas pressure and pulsation of the star seem to play more direct roles in sustaining the outflow. Taking this fact into account in stellar evolution models which include dust and wind formation will be important and may lower the resultant dust yields. 

Ort, förlag, år, upplaga, sidor
Societa Astronomica Italiana , 2016. nr 2, s. 249-254
Nyckelord [en]
Stars: AGB and post-AGB, Stars: Atmospheres, Stars: evolution, Stars: mass loss, Stars: variables: general, Dust, Wind, Stars: atmosphere, Stars:AGB and post AGB, Stars
Nationell ämneskategori
Fysik
Identifikatorer
URN: urn:nbn:se:kth:diva-216861Scopus ID: 2-s2.0-85025143580OAI: oai:DiVA.org:kth-216861DiVA, id: diva2:1156385
Konferens
2015 AGB Stars: A Key Ingredient in the Understanding and Interpretation of Stellar Populations, European Week of Astronomy and Space Science, 22 June 2015 through 26 June 2015
Anmärkning

Conference code: 128645; Export Date: 24 October 2017; Conference Paper; Correspondence Address: Mattsson, L.; Nordita, KTH Royal Institute of Technology, Stockholm University, Roslagstullsbacken 23, Sweden; email: larsmat@kth.se. QC 20171113

Tillgänglig från: 2017-11-13 Skapad: 2017-11-13 Senast uppdaterad: 2017-11-13Bibliografiskt granskad

Open Access i DiVA

Fulltext saknas i DiVA

Scopus

Sök vidare i DiVA

Av författaren/redaktören
Mattsson, Lars
Av organisationen
Nordic Institute for Theoretical Physics NORDITA
Fysik

Sök vidare utanför DiVA

GoogleGoogle Scholar

urn-nbn

Altmetricpoäng

urn-nbn
Totalt: 11 träffar
RefereraExporteraLänk till posten
Permanent länk

Direktlänk
Referera
Referensformat
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annat format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annat språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf