Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aas...20921603k&link_type=abstract
2007 AAS/AAPT Joint Meeting, American Astronomical Society Meeting 209, #216.03; Bulletin of the American Astronomical Society,
Astronomy and Astrophysics
Astronomy
Scientific paper
The unusual variable V725 Sgr has changed its period several times in the past century, most dramatically between 1926 and 1935. In this study, linear non-adiabatic static atmosphere models are adjusted to fit data for the variable between 1926, when the period was 12 days, to that of 1935, when it had increased to 21 days. The estimated value for the effective temperature is initially set at 5000 K and masses between 3 and 11 solar masses are investigated in the models in order to reproduce the behavior of V725 Sgr during this time. Models of various metallicities are used with values of Z=0.0002 0.0006. A range of likely models will be presented that follow the evolution of the star between 1926 and 1935 and these will be compared to evolutionary models with similar characteristics.
Kagy Holly M.
Morgan Siabahn M.
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