Astronomy and Astrophysics – Astrophysics
Scientific paper
Apr 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986apj...303..766f&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 303, April 15, 1986, p. 766-768.
Astronomy and Astrophysics
Astrophysics
5
Astronomical Photometry, Cepheid Variables, Light Curve, Amplitude Distribution Analysis, Electrophotometry, Milky Way Galaxy
Scientific paper
The existing database on Cepheids with periods between 5-15 days was analyzed to discern any constraints on the characteristics of bumps in the light curves. A total of 40 objects with definite bumps were extracted, along with 62 known definitely not to have bumps. No attempt was made to correct for binarity. All the chosen Cepheids were analyzed in terms of the light amplitude as a function of the periods. The analysis demonstrated that all intermediate-period objects possessed bumps, and short and long period Cepheids exhibited large amplitude ranges. The data indicate that bump Cepheids with periods up to 11 days have pulsational amplitudes ranging from 9-11 percent. Pulsational amplitudes rise quickly for Cepheids with periods longer than 11 days.
Chan Siu-Kuen Josephine
Fernie Donald J.
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