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On The Physical Existence of The Zeta Reticuli Moving Group: A Chemical Composition Analysis

Published online by Cambridge University Press:  09 March 2010

Letícia D. Ferreira
Affiliation:
Universidade do Federal do Rio de Janeiro, Observatório do Valongo, Ladeira do Pedro Antônio 43, Rio de Janeiro, RJ, Brazil. email: [email protected], [email protected]
Gustavo F. Porto de Mello
Affiliation:
Universidade do Federal do Rio de Janeiro, Observatório do Valongo, Ladeira do Pedro Antônio 43, Rio de Janeiro, RJ, Brazil. email: [email protected], [email protected]
Licio da Silva
Affiliation:
Observatório Nacional, Rua Gen. José Cristino 77, São Cristovão, Rio de Janeiro, RJ, Brazil email: [email protected]
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Abstract

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We report the spectroscopic analysis of six kinematical members of the Zeta Reticuli Moving Group, one of them for the first time. We confirm the existence of the Group by establishing a common abundance pattern for four kinematical members. High resolution spectra yielded abundances of Si, Ca, Fe, Ni and Ba, and others. Effective temperatures were derived from the excitation & ionization equilibria of Fe lines of four stars. For these, and the remaining two members, temperatures were derived from colors and the fitting of theoretical spectra to the Hα line, and ages and masses were estimated from theoretical HR diagrams. We suggest that the Group is physical being metal-poor and ~6 Gyr old.

Type
Contributed Papers
Copyright
Copyright © International Astronomical Union 2010

References

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