The spectroscopic and photometric effects of rotation in the A-type stars

Details The spectroscopic and photometric effects of rotation in the A-type stars The spectroscopic and photometric effects of rotation in the A-type stars

Dec 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988jrasc..82..336g&link_type=abstract

Journal of the Royal Astronomical Society of Canada (ISSN 0035-872X), vol. 82, Dec. 1988, p. 336-348.

Astronomy and Astrophysics

Astronomy

22

A Stars, Hertzsprung-Russell Diagram, Stellar Rotation, Stellar Spectrophotometry, Balmer Series, H Beta Line, High Resolution, Stellar Color

Scientific paper

Theoretical models suggest that an A2 star viewed in the equatorial plane will have the same photometric temperature as an F0 star when it is rotating at the critical velocity. If angular momentum is added to this star, the spectral type will also move toward later types. There is therefore no way in which such absolute changes in the parameters of the star can be detected by spectral classification or photometry; all that can be detected are the differential effects of rotation that would reflect the sensitivities of the temperature criteria to rotation. It is suggested in view of these considerations that Vega is a rapid rotator, seen edge-on.

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