Binarity and Cluster Membership of Classical Cepheids

Details Binarity and Cluster Membership of Classical Cepheids Binarity and Cluster Membership of Classical Cepheids

Feb 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011eas....45..441s&link_type=abstract

EAS Publications Series, Volume 45, 2011, pp.441-444

Astronomy and Astrophysics

Astronomy

1

Scientific paper

Companions exert adverse effects on the relationships valid for Cepheids. Physical companions may also cause observable effects (e.g., phase jump in the pulsation, slight excitation of non-radial modes). Many new binaries among Cepheids can be revealed by using radial velocity measurements to be made by Gaia and by deriving astrometric orbit from data to be obtained over the five years of the Gaia mission. Cluster membership of Cepheids also facilitates the calibration of the period-luminosity relationship independently of the pulsation. A brief summary on the membership of Cepheids in clusters is also given.

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