Galactic clusters with associated Cepheid variables. III - NGC 1647 and SZ Tauri

Details Galactic clusters with associated Cepheid variables. III - NGC 1647 and SZ Tauri Galactic clusters with associated Cepheid variables. III - NGC 1647 and SZ Tauri

Nov 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992aj....104.1865t&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 104, no. 5, p. 1865-1875.

Astronomy and Astrophysics

Astronomy

43

Astronomical Photometry, Cepheid Variables, Galactic Clusters, Stellar Spectra, Taurus Constellation, Ubv Spectra, Interstellar Extinction, Open Clusters, Radial Velocity

Scientific paper

Observational data and analysis are used to argue that the Cepheid Z Tau is an outlying member of the open cluster NGC 1647. The spatial coincidence of the Cepheid with the cluster corona, as well as coincidences in radial velocity, proper motion, and age with cluster members, present a convincing case for cluster membership, which is also supported by independent estimates for the mean radius of SZ Tau. The evidence presented by the derived luminosity of the Cepheid and its light curve strongly indicates that SZ Tau is pulsating in the first overtone, rather than fundamental, mode.

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