Astronomy and Astrophysics – Astrophysics
Scientific paper
Oct 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986a%26as...66...37m&link_type=abstract
Astronomy and Astrophysics Supplement Series (ISSN 0365-0138), vol. 66, no. 1, Oct. 1986, p. 37-44. Research supported by the Eu
Astronomy and Astrophysics
Astrophysics
14
A Stars, Electrophotometry, Open Clusters, Peculiar Stars, Stellar Spectrophotometry, Astronomical Catalogs, Stellar Magnitude
Scientific paper
Delta-a photometry for 90 stars in the areas of the rather young open clusters IC 2391 and NGC 2451, covering the whole spectral domain of CP2-stars, is presented. Seven stars show up as photometrically peculiar, but membership is probable only for 4, 2 for each cluster. NGC 2451 may have to be divided into a near and a far cluster. IC 2391 is unreddened and presents itself as ideal reference for the normality line in the Delta-a photometry. Crawford's (1978) calibration yields absolute magnitudes for the peculiar stars which result in distance moduli very close to the mean cluster modulus. Again it is possible to confront the diversity of spectral classifications with the photometric peculiarity index Delta-a.
Catalano F. A.
Maitzen Hans Michael
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