Wesselink radii of double-mode cepheids
Open Access
- 1 December 1979
- journal article
- Published by Oxford University Press (OUP) in Monthly Notices of the Royal Astronomical Society
- Vol. 189 (4) , 659-666
- https://doi.org/10.1093/mnras/189.4.659
Abstract
The pulsation properties of double-mode cepheids are discussed and found to be indistinguishable from those of normal Population I cepheids. Intrinsic colours of double-mode cepheids show that there is no preferred temperature domain for these stars. Simultaneous BVRI photometry and photoelectric radial velocities are used to estimate the radii of eight double-mode cepheids by a modified Wesselink technique. The period–radius relationship is found to be the same as that of normal cepheids, but very different from predictions of pulsation theory using chemically homogeneous stars.Keywords
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