Measurements of rotation and turbulence in F, G, and K dwarfs

Spectral line broadening in 18 F, G, and K dwarfs is analyzed for rotation and macroturbulence. Zeeman broadening is shown to have a significant effect on the derived parameters in late G and early K dwarfs. Support is found for the traditional (lower) v sin i scale. The rotation of the sun is proba...

Full description

Saved in:
Bibliographic Details
Published inThe Astrophysical journal Vol. 281; no. 2; pp. 719 - 722
Main Author GRAY, D. F
Format Journal Article
LanguageEnglish
Published Chicago, IL University of Chicago Press 01.06.1984
Subjects
Astronomy
Earth, ocean, space
Exact sciences and technology
Normal stars (by class): general or individual
Stars
F star
Rotating star
Zeeman effect
Turbulence
K star
G star
Spectral line
Stellar rotation
Online AccessGet full text

Cover

More Information
Summary:Spectral line broadening in 18 F, G, and K dwarfs is analyzed for rotation and macroturbulence. Zeeman broadening is shown to have a significant effect on the derived parameters in late G and early K dwarfs. Support is found for the traditional (lower) v sin i scale. The rotation of the sun is probably normal compared to other stars. The average macroturbulence velocity decreases rapidly with advancing spectral type at the rate of 4 km/s per thousand degrees of effective temperature. The macroturbulence velocity is proportional to the granulation velocities for F and G stars.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0004-637X
1538-4357
DOI:10.1086/162149