INSUGEO 12554
INSTITUTO SUPERIOR DE CORRELACION GEOLOGICA
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Clasifications of clusters and galactic field stars
Autor/es:
PINTADO, O. I.; PAUNZEN, E.; NETOPIL, M.; RODE-PAUNZEN, M.
Lugar:
Morelia
Reunión:
Congreso; XIII Reunion Regional Latinoamericana de Astronomía; 2010
Institución organizadora:
UNAM- Morelia
Resumen:
The main characteristics of the so-called classical CP stars of the upper
main sequence are: peculiar and often variable spectral lines, quadrature of
line variability with radial velocity changes, photometric variability with the
same periodicity and sometimes coincidence of extrema. Elemental overabundances
of several orders of magnitude compared to the Sun were derived for silicon,
iron, chromium, strontium and europium.
Since several decades, much photometric work was performed to find bona-fide
CP stars, for example via Delta a photometry. But for a further analysis of
these
objects, at least spectral classifications are needed.
We present detailed results of classification resolution spectroscopy for 35
CP star candidates in the Galactic field and open clusters. All but two are
true CP stars. We discuss the cluster membership, astrophysical parameters and
previously published data for these objects.
