Other
Scientific paper
Feb 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987aj.....93..368t&link_type=abstract
Astronomical Journal (ISSN 0004-6256), vol. 93, Feb. 1987, p. 368-373.
Other
18
Cepheid Variables, Interstellar Extinction, Spectrum Analysis, Stellar Spectrophotometry, Stellar Color
Scientific paper
Photometric color excesses are derived for 35 northern hemisphere Cepheids using published khg2 and b-y photometry in conjunction with space reddenings for five Cepheids spanning the period interval from 3 to 45 days. Differences between the derived intrinsic relations for declining light and rising light, attributed to variations in atmospheric line blanketing during the Cepheid pulsational cycles, restrict the reliable reddening solutions to those obtained from declining-light data. The technique adopted to derive Cepheid color excesses, unlike other photometric techniques, is argued to be independent of any local variations in the interstellar reddening law, through the reddening independence of khg2. A comparison of the present results with published photometric reddenings suggests the presence of zero-point and reddening-dependent errors in some of these compilations. However, the reddenings tabulated by Parsons and Bouw, and Dean, Warren, and Cousins, appear to be free of such problems.
English Darlene A.
Leonard Peter J. T.
Turner David G.
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