Spitzer Observations of Galactic Classical Cepheids

Details Spitzer Observations of Galactic Classical Cepheids Spitzer Observations of Galactic Classical Cepheids

May 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aas...21443002r&link_type=abstract

American Astronomical Society, AAS Meeting #214, #430.02; Bulletin of the American Astronomical Society, Vol. 41, p.701

Astronomy and Astrophysics

Astronomy

Scientific paper

For classical Cepheids, there is a persistent discrepancy between measured masses and masses from evolutionary and pulsation calculations. To investigate whether this could be due to mass loss we observed a sample of galactic Cepheids with Spitzer IRAC and MIPS to search for infrared excess in the energy distributions. IRAC and MIPS 24 micron data provide excellent Leavitt Laws (Period-Luminosity relations), based on available distances, including recent HST parallaxes.
Funding for this work was provided by Spitzer grant 1288762 and Chandra X-ray Center NASA Contract NAS8-39073.

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