Einstein observations of three classical Cepheids

Details Einstein observations of three classical Cepheids Einstein observations of three classical Cepheids

Mar 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983apj...266..171b&link_type=abstract

Astrophysical Journal, Part 1, vol. 266, Mar. 1, 1983, p. 171-174.

Other

6

Cepheid Variables, Chromosphere, Heao 2, X Ray Sources, Astronomical Spectroscopy, F Stars, G Stars, Supergiant Stars

Scientific paper

The authors have looked for X-ray emission from the classical Cepheids δ Cep, β Dor, and ζ Gem during phases when the later two stars show emission in low excitation chromospheric lines. No X-ray flux was detected except possibly from ζ Gem at phase 0.26. Derived upper limits are in line with emission flux or upper limits obtained for other F and G supergiants.

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