New Aspect of Long-Period Variable Stars from Hipparcos: First Results

Details New Aspect of Long-Period Variable Stars from Hipparcos: First Results New Aspect of Long-Period Variable Stars from Hipparcos: First Results

Aug 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997esasp.402..275m&link_type=abstract

Proceedings of the ESA Symposium `Hipparcos - Venice '97', 13-16 May, Venice, Italy, ESA SP-402 (July 1997), p. 275-278

Physics

2

Scientific paper

The Long Period Variable stars are a mixing of several types of evolved red stars which are traditionnally distinguished only according to the amplitude and the regularity of the light curves. They can be oxygen or carbon rich or have an excess of s-elements. The thicknesses of their envelopes are strongly different. The accuracy and the number of the Hipparcos data allows us to refine the distinction between the different types of LPVs in terms of stellar populations and to calibrate their absolute visual magnitudes. This provides new information on their evolutionary links and implications for the stellar and circumstellar physics.

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