EDP Sciences
Free Access
Volume 402, Number 1, April IV 2003
Page(s) 331 - 334
Section Formation and evolution of planetary systems
DOI https://doi.org/10.1051/0004-6361:20030222
Published online 07 April 2003

A&A 402, 331-334 (2003)
DOI: 10.1051/0004-6361:20030222

Elemental abundance studies of CP stars

The helium-weak stars HD 19400, HD 34797 and HD 35456*
M. S. Alonso1, Z. López-García2, 3, 1, S. Malaroda2, 1, 4 and F. Leone5, 6

1  Facultad de Ciencias Exactas, Físicas y Naturales, Universidad Nacional de San Juan, Argentina
2  Complejo Astronómico El Leoncito, CC 467, 5400 San Juan, Argentina
3  Member of the Carrera del Investigador Científico, CONICET, Consejo Nacional de Investigaciones Científicas y Técnicas de la República Argentina
4  Comisión de Investigaciones Científicas de la Provincia de Buenos Aires, Argentina
5  Osservatorio Astrofisico di Catania, Citá Universitaria, 95125 Catania , Italy
6  Visiting Astronomer at Complejo Astronómico El Leoncito operated under agreement between Consejo Nacional de Investigaciones Científicas y Técnicas de la República Argentina and the National Universities of La Plata, Córdoba and San Juan

(Received 23 August 2002 / Accepted 16 December 2002 )

An analysis of the abundances of the helium-weak CP stars HD 19400, HD 34797 and HD 35456, is presented using ATLAS9 model atmospheres and observational material taken with a REOSC echelle spectrograph attached to the Jorge Sahade 2.15 m telescope at CASLEO. The light elements are deficient except silicon which is overabundant in HD 19400 and HD 34797. The iron peak elements are all overabundant by factors between 5 and 60. The heavy elements show an overabundance in the three stars studied.

Key words: stars: chemically peculiar -- stars: abundances -- stars: individual: HD 19400 -- stars: individual: HD 34797 -- stars: individual: HD 35456

Offprint request: Z. López-García, zlgarcia@casleo.gov.ar

SIMBAD Objects

© ESO 2003

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.