Analysis of the Chemical Composition of the Atmospheres of Stars with Debris Disks and Planetary Systems

ROJAS, M; DRAKE, N.A.; C. CHAVERO; PEREIRA, C.B.; KHOLTYGIN, A. F; SOLOVYOV, D. I.

ASTROPHYSICS

SPRINGER/PLENUM PUBLISHERS

Lugar: New York; Año: 2013 vol. 56 p. 461 - 471

0571-7256

Spectroscopic studies of seven low mass stars in spectral classes F, G, and K are presented. Four of these(HD 1581, HD 10700, HD 17925, and HD 22484) have debris disks and for two of them (HD 22049 andHD 222582(A+B)) planets are observed. Neither a debris disk nor planets have been observed for one theprogram stars (HD 20766). High resolution spectral observations of the program stars were made at the2.2-m telescope of the European Southern Observatory (ESO) during 2008 with the FEROS spectrograph(R=48000, spectral range 3800-9200 Å). The fundamental parameters of the stars are determined, includingeffective temperature, acceleration of gravity at the stars surface, microturbulence velocity, metallicity,and the abundances of volatile and refractory elements in their atmospheres. The positions of all thesestars are indicated on a Hertzsprung-Russell diagram.