Determination of Miras temperatures from TiO and VO bands. Estimates of distances.

Details Determination of Miras temperatures from TiO and VO bands. Estimates of distances. Determination of Miras temperatures from TiO and VO bands. Estimates of distances.

Feb 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997a%26a...317..761a&link_type=abstract

Astronomy and Astrophysics, v.317, p.761-768

Astronomy and Astrophysics

Astrophysics

25

Stars: Atmospheres, Stars: Distances, Stars: Fundamental Parameters, Stars: Agb And Post-Agb

Scientific paper

Effective temperatures are determined for a sample of 165 oxygen-rich Miras using indices related to molecular band strength of titanium oxide and vanadium oxide computed from narrow-band photometry observations. We find a clear although very scattered period-temperature relation which agrees with a previous one. Using a theoretical evolutionary track on AGB and assuming that the scatter around the period-temperature relation is due to mass differences, we can obtain a period-luminosity relation similar to the one observed in the LMC if the mass range is 0.8 to 2.6Msun_. Effects of metallicity are discussed. The determined luminosities are used to calibrate distances that are compared to several other estimations.

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