Four-colour UVBY and H-beta photometry of all A3 to F5 stars brighter than m(pg) = about 11.0 mag in 6 Selected Areas close to the Galactic plane

Astronomy and Astrophysics – Astrophysics

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A Stars, F Stars, H Beta Line, Stellar Spectrophotometry, Ubv Spectra, Astronomical Catalogs, Interstellar Matter

Scientific paper

Strömgren uvbyβ photometry has been obtained for 540 stars of spectral types A3 to F5 and brighter than mpg = 11m.0 for 6 areas in the Potsdam Spektral-Durchmusterung of the Kapteyn Selected Areas. The observed areas are: SA 171, SA 173, SA 175, SA 177, SA 192 and SA 195. The regions are chosen to have a varying angular distance from molecular cloud complexes. The results give V, b-y, m1, c1 and Hβ on the standard system. Some programme stars are common to previous works. The results have been compared and no systematic differences were found in any index or magnitude. Preliminary information about the reddening is obtained.

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