Observational evidence for mass loss from classical Cepheids

Details Observational evidence for mass loss from classical Cepheids Observational evidence for mass loss from classical Cepheids

Apr 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988mnras.231..673d&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 231, April 1, 1988, p. 673-694.

Astronomy and Astrophysics

Astronomy

37

Cepheid Variables, Cosmic Dust, Hertzsprung-Russell Diagram, Stellar Evolution, Stellar Mass Ejection, Ultraviolet Radiation, Infrared Astronomy Satellite, Infrared Radiation, Iue, Stellar Winds, Thermal Emission

Scientific paper

This paper examines the evidence for mass loss from classical Cepheid variables in the light of recent observational studies of infrared and ultraviolet emission from these objects. Mass-loss rates derived for several stars range between 10-10M_sun;yr-1 and 10-6M_sun;yr-1. The lower end of this range probably corresponds to the majority of classical Cepheids. Non-variable supergiants show, on average, a somewhat lower rate of infrared excess, but have mass-loss rates of the same order of magnitude as the Cepheids. On the basis of the observations to date, mass loss alone is insufficient in explaining the Cepheid mass discrepancy, indicating that adjustments to the evolutionary or pulsation models present a better prospect of resolving this discrepancy.

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