Effective Temperature and Surface Gravity of Mira Variables

Details Effective Temperature and Surface Gravity of Mira Variables Effective Temperature and Surface Gravity of Mira Variables

Sep 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999aas...19410504p&link_type=abstract

American Astronomical Society Meeting 194, #105.04

Astronomy and Astrophysics

Astronomy

Scientific paper

Synthetic and observed spectra are compared to yield effective temperatures and surface gravities for three Mira variables, R Leo, V CVn, and R CVn as a function of phase. Spectra are synthesized with ATLAS, using model atmospheres obtained from the Kurucz and Indiana University datasets. Experimental data was provided by M.W. Castelaz and E. Messer, and a best fit was determined between the two. Zirconium oxide at 6500 Angstroms was found to be a good indicator of surface gravity. We find a general decrease in Teff and log g as phase increases from 0 to 0.5, which is consistent with observed visual magnitudes.

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