Astronomy and Astrophysics – Astrophysics
Scientific paper
Jul 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991a%26a...247...77r&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 247, no. 1, July 1991, p. 77-86. Research supported by Junta de Andalucia and
Astronomy and Astrophysics
Astrophysics
17
Metallicity, Stellar Oscillations, Variable Stars, Abundance, Stellar Composition
Scientific paper
We have carried out a systematic study of the behavior of the Delta-m(1) metallicity parameter for SX Phe and high amplitude Delta Sct(pop. I) stars. It is shown that it has a different behavior for the two samples of stars. The Delta-m(1) parameter increases (SX Phe) or decreases (Delta Sct) towards minimum light for these two types of variables. Moreover, the m(1)-index variation is larger when the metal abundance of the star is smaller. An analogous effect is found in, other photometric indices.
de Coca Lopez P.
Garrido Rafa
Rodríguez Eduardo
Rolland A.
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