Idioma:

Measuring stellar oscillations using equivalent widths of absorption lines

Bedding, T. R. ; Kjeldsen, H. ; Reetz, J. ; Barbuy, B.

Monthly notices of the Royal Astronomical Society, 1996-06, Vol.280 (4), p.1155-1161 [Periódico revisado por pares]

Texto completo disponível

Citações Citado por

Título:
Measuring stellar oscillations using equivalent widths of absorption lines
Autor: Bedding, T. R. ; Kjeldsen, H. ; Reetz, J. ; Barbuy, B.
Assuntos: stars: individual: α Cen A (HR 5459) ; stars: individual: η Boo (HR 5235) ; stars: oscillations ; Sun: atmosphere ; Sun: oscillations ; δ Scuti
É parte de: Monthly notices of the Royal Astronomical Society, 1996-06, Vol.280 (4), p.1155-1161
Notas: ark:/67375/HXZ-G5TVQS4Z-M
istex:74F1290E4AD5E2FE773C358F32B5DCCFB010E703
ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
Descrição: Kjeldsen et al. have developed a new technique for measuring stellar oscillations, and claimed a detection in the G subgiant ηBoo. The technique involves monitoring temperature fluctuations in a star via their effect on the equivalent width of Balmer lines. In this paper we use synthetic stellar spectra to investigate the temperature dependence of the Balmer lines, Ca II, Fe I, the Mg b feature and the G band. We present a list of target stars likely to show solar-like oscillations, and estimate their expected amplitudes. We also show that centre-to-limb variations in Balmer-line profiles allow one to detect oscillation modes with ℓ ≤4, which accounts for the detection by Kjeldsen et al. of modes with degree ℓ = 3 in integrated sunlight.
Editor: Oxford, UK: Blackwell Science Ltd
Idioma: Inglês

Voltar para lista de resultados