Delta-a photometry of lambda Bootis stars

Details Delta-a photometry of lambda Bootis stars Delta-a photometry of lambda Bootis stars

Jul 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989a%26a...219..253m&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 219, no. 1-2, July 1989, p. 253-255. Research supported by the Universitaet Wi

Astronomy and Astrophysics

Astrophysics

12

A Stars, Astronomical Photometry, Metallicity, Stellar Spectra, Tables (Data), Telescopes

Scientific paper

Delta-a photometry, which had been originally designed for discriminating magnetic peculiar stars in a vs. color diagrams, is shown to separate there lambda Bootis stars in the opposite sense, i.e. by negative Delta-a-values indicating low metallicity as the m1-index of Stroemgren photometry, which however suffers from contamination through H-delta effects. Controversial lambda Bootis type assignments are discussed in connection with their Delta-a-values.

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