CAOSP abstracts, Volume: 27, No.: 3, year: 1998
- Author(s): NORTH, P.; ERSPAMER, D.; KUNZLI, M.
- Journal: Contributions of the Astronomical Observatory Skalnate Pleso,
vol. 27, no. 3, p. 252-254.
- Date: 04/1998
- Title: The evolutionary state and fundamental parameters of metallic A-F giants
- Keyword(s): STARS: FUNDAMENTAL PARAMETERS, STARS: CHEMICALLY PECULIAR, STARS:
ROTATION, STARS: EVOLUTION
- Pages: 252 -- 254
Abstract:
Using Hipparcos parallaxes, we show that the metallic A-F giants found
by Hauck on the basis of their high Delta m(2) index in Geneva photometry
are on average more evolved than their non-metallic counterparts. Their
mass distribution, rate of binaries and v sin i are shown to be incompatible
with those of Am stars, so that they cannot be descendants of the latter.
They might be former normal stars going through a short metal-rich phase
at the very end of their life on the Main Sequence.
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