Carbon abundances and meridional mixing in rapidly rotating early-A stars

Details Carbon abundances and meridional mixing in rapidly rotating early-A stars Carbon abundances and meridional mixing in rapidly rotating early-A stars

Oct 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986pasp...98..927l&link_type=abstract

Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 98, Oct. 1986, p. 927-934. Research supported by the Ro

Astronomy and Astrophysics

Astronomy

16

A Stars, Abundance, Carbon Stars, Stellar Composition, Stellar Rotation, Early Stars, Meridional Flow, Peculiar Stars, Spectral Line Width, Stellar Spectra

Scientific paper

Carbon abundances are obtained from lines of C I at 9100 A for 22 early-A main-sequence stars with projected rotational velocities of up to 180 km/s. The abundance shows no significant trend with increasing rotation. A preliminary conclusion is that meridional mixing currents do not bring CN-processed material into the atmospheres of these rotating A stars. Several carbon deficient stars are tentatively identified as chemically peculiar A stars. Future surveys should cover a sufficient wavelength interval to permit a spectral classification and a determination of the microturbulence.

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