Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Winds of AGB stars: The two roles of atmospheric dust
KTH, Centres, Nordic Institute for Theoretical Physics NORDITA.
2016 (English)In: Memorie della Societa Astronomica Italiana - Journal of the Italian Astronomical Society, Societa Astronomica Italiana , 2016, no 2, p. 249-254Conference paper (Refereed)
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. 

Place, publisher, year, edition, pages
Societa Astronomica Italiana , 2016. no 2, p. 249-254
Keywords [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
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-216861Scopus ID: 2-s2.0-85025143580OAI: oai:DiVA.org:kth-216861DiVA, id: diva2:1156385
Conference
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
Note

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

Available from: 2017-11-13 Created: 2017-11-13 Last updated: 2017-11-13Bibliographically approved

Open Access in DiVA

No full text in DiVA

Scopus

Search in DiVA

By author/editor
Mattsson, Lars
By organisation
Nordic Institute for Theoretical Physics NORDITA
Physical Sciences

Search outside of DiVA

GoogleGoogle Scholar

urn-nbn

Altmetric score

urn-nbn
Total: 9 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf