Upper Main Sequence Stars with Anomalous Abundances. The HgMn stars HR 3273, HR 8118, HR 8567 AND HR 8937

SAFFE, CARLOS; NUÑEZ, NATALIA; LEVATO, HUGO

REVISTA MEXICANA DE ASTRONOMíA Y ASTROFíSICA

UNIV NACIONAL AUTONOMA MEXICO

Lugar: México D. F. ; Año: 2011 vol. 47 p. 219 - 234

0185-1101

This work is part of our current study for verifying a possible relation between abundances of HgMn stars with stellar parameters, rotation and age. We present an analysis of the stars HR 3273, HR 8118, HR 8567 and HR 8937. We used echelle spectra taken with the CASLEO 2.1m telescope and ATLAS9 model atmospheres. He I was underabundant for the HgMn stars. O was slightly underabundant in HR 3273 and HR 8567. Mg II was underabundant except for HR 8118. Si II was close to solar in HR 8118 and HR 8937, and underabundant in HR 3273 and HR 8567. Fe was slightly underabundant in HR 3273 and HR 8567, and slightly overabundant in HR 8118 and HR 8937. The species Sc, Ti, Cr, Mn, Sr, Y and Zr were overabundant while Ni was underabundant.