Photoelectric filter photometry of the flux depression at 5200 A in Ap-stars

Details Photoelectric filter photometry of the flux depression at 5200 A in Ap-stars Photoelectric filter photometry of the flux depression at 5200 A in Ap-stars

Sep 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976a%26a....51..223m&link_type=abstract

Astronomy and Astrophysics, vol. 51, no. 2, Sept. 1976, p. 223-233. In German.

Astronomy and Astrophysics

Astrophysics

133

A Stars, Electrophotometry, Stellar Spectrophotometry, B Stars, Indexes (Ratios), Optical Filters, Radiant Flux Density, Stellar Luminosity

Scientific paper

A new photometric index was used to characterize the flux depression at 5200 A in a photoelectric filter photometric study of a large number of normal A-stars, Ap-stars, Am-stars, and Hg-Mn-stars. The new index is defined as a = g - (h + y)/2, where g and h are the brightnesses at 5240 and 5020 A, respectively, measured by interference filters, and y is the brightness measured with a Stromgren filter. The index reveals a marked contrast between normal and peculiar stars.

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