Publication Date:
2019-06-28
Description:
We have looked for X-ray emission from the classical Cepheids delta Cep, beta Dor, and zeta Gem during phases when the latter two stars show emission in low excitation chromospheric lines. No X-ray flux was detected except possibly from zeta Gem at phase 0.26. Derived upper limits are in line with emission flux or upper limits obtained for other F and G supergiants.
Keywords:
ASTRONOMY
Type:
Astrophysical Journal; vol. 266
Format:
text
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