Astronomy and Astrophysics – Astrophysics
Scientific paper
Mar 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980a%26a....83..328m&link_type=abstract
Astronomy and Astrophysics, vol. 83, no. 3, Mar. 1980, p. 328-333. Deutsche Forschungsgemeinschaft
Astronomy and Astrophysics
Astrophysics
21
A Stars, Electrophotometry, Stellar Spectrophotometry, Optical Filters, Stellar Temperature, Transmissivity
Scientific paper
The paper presents photoelectric photometry of Ap and normal A-type stars in a filter system which resembles the system introduced by Maitzen (1976) in order to measure the strength of the 5200-A feature. It is found that the 5200-A depression cannot be due to a single opacity source but is composed of two main components with different temperature behavior: a broad, shallow feature and a narrow, rather deep one. The latter is centered on about 5175 A and shows its greatest strength at the hottest Ap stars; the former peaks at somewhat longer wavelengths and at a lower temperature.
Maitzen Hans Michael
Seggewiss Wilhelm
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