A quest for differential stellar rotation in A stars
1977; IOP Publishing; Volume: 211; Linguagem: Inglês
10.1086/154920
ISSN1538-4357
Autores Tópico(s)Astronomy and Astrophysical Research
Resumoview Abstract Citations (63) References (25) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS A quest for differential stellar rotation in A stars. Gray, D. F. Abstract Photoelectric line-profile measurements of the Mg II line at 4481 A and the Fe II line at 4352 A in the A stars Alpha Aql, Alpha Peg, Beta Eri, Alpha Cep, Gamma Boo, and Gamma Her are subjected to Fourier analysis in order to detect differential rotation. Effects of limb darkening on a rotationally broadened line profile are considered and compared with those of differential rotation. In the analysis, a measured rotationally broadened flux profile is expressed as a convolution of the rotation profile, and the existence of differential rotation is identified by finding a line-profile transform having an anomalously small ratio of first to second sidelobe amplitudes. The results indicate that differential rotation is apparently absent in A stars Publication: The Astrophysical Journal Pub Date: January 1977 DOI: 10.1086/154920 Bibcode: 1977ApJ...211..198G Keywords: A Stars; Fourier Analysis; Line Spectra; Spectrum Analysis; Stellar Rotation; Stellar Spectra; Early Stars; Fourier Transformation; Limb Darkening; Sidelobes; Astrophysics full text sources ADS | data products SIMBAD (6)
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