Fundamental Parameters of Cepheids: Masses and Multiplicity

Details Fundamental Parameters of Cepheids: Masses and Multiplicity Fundamental Parameters of Cepheids: Masses and Multiplicity

2009-10-15

arxiv.org/abs/0910.2753v1

Evans, N. R. 2009, "Stellar Pulsation: Challenges for Theory and Observation", ed. J. A. Guizik and P. A. Bradley, AIP Conf. 1

Astronomy and Astrophysics

Astrophysics

Galaxy Astrophysics

Scientific paper

Masses determined from classical Cepheids in binary systems are a primary test of both pulsation and evolutionary calculations. The first step is to determine the orbit from ground-based radial velocities. Complementary satellite data from Hubble, FUSE, IUE, and Chandra provide full information about the system. A summary of recent results on masses is given. Cepheids have also provided copious information about the multiplicity of massive stars, as well as the distribution of mass ratios and separations. This provides some important constraints for star formation scenarios including differences between high and low mass results and differences between close and wide binaries.

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