Photographic photometry of the open cluster NGC 7790

Details Photographic photometry of the open cluster NGC 7790 Photographic photometry of the open cluster NGC 7790

Nov 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984apj...286..563p&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 286, Nov. 15, 1984, p. 563-572. Research supported by the National Research

Astronomy and Astrophysics

Astrophysics

21

Astronomical Photography, Astronomical Photometry, Cepheid Variables, Open Clusters, Interstellar Extinction, Star Distribution, Stellar Luminosity, Ubv Spectra

Scientific paper

A UBV photometric study of the open cluster NGC 7790 containing three Cepheids is presented using new photographic data obtained at the Canada-France-Hawaii Telescope and calibrated to approximately V = 19 mag. Using fitting procedures which account for binaries, field contamination, and individual reddenings, a true distance modulus of 12.3 + or - 0.2 mag is derived for a mean E(B-V) = 0.64 + or - 0.05 mag. While the presently derived distance modulus (for a Hyades distance scale of 3.17) is in very good agreement with the 1984 results of Schmidt and of Balona and Shobrook for NGC 7790 using four-color and H-beta photometry, it is significantly different from Sandage's original (1958) results.

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