Interstellar Extinction and the Intrinsic Colors of Classical Cepheids in the Galaxy, the LMC, and the SMC

Details Interstellar Extinction and the Intrinsic Colors of Classical Cepheids in the Galaxy, the LMC, and the SMC Interstellar Extinction and the Intrinsic Colors of Classical Cepheids in the Galaxy, the LMC, and the SMC

Jul 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003ap.....46..304a&link_type=abstract

Astrophysics (English translation of Astrofizika), v. 46, Issue 3, p. 304-318 (2003).

Astronomy and Astrophysics

Astrophysics

2

Stars Variables - Cepheids Interstellar Extinction - Individual Galaxy - Lmc - Smc

Scientific paper

New methods are applied to samples of classical cepheids in the galaxy, the Large Magellanic Cloud, and the Small Magellanic Cloud to determine the interstellar extinction law for the classical cepheids, R B:R V:R I:R J:R H:R K= 4.190:3.190:1.884:0.851:0.501:0.303, the color excesses for classical cepheids in the galaxy, E(B-V)=-0.382-0.168logP+0.766(V-I), and the color excesses for classical cepheids in the LMC and SMC, E(B-V)=-0.374-0.166logP+0.766(V-I). The dependence of the intrinsic color (B-V)0 on the metallicity of classical cepheids is discussed. The intrinsic color (V-I)0 is found to be absolutely independent of the metallicity of classical cepheids. A high precision formula is obtained for calculating the intrinsic colors of classical cepheids in the galaxy: (-)0=0.365(±0.011)+0.328(±0.012)logP.

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