Granulation signatures in the spectrum of the very metal-poor red giant HD 122563

Ramirez, I; Collet, Remo; Lambert, D.L.; Allende Prieto, Carlos; Asplund, Martin

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Granulation signatures in the spectrum of the very metal-poor red giant HD 122563

Date

2010

Authors

Ramirez, I

Collet, Remo

Lambert, D.L.

Allende Prieto, Carlos

Asplund, Martin

Publisher

Institute of Physics Publishing Ltd.

Abstract

A very high resolution (R = λ/ Δλ = 200,000), high signal-to-noise ratio (S/N ≃ 340) blue-green spectrum of the very metal-poor ([Fe/H] ≃ -2.6) red giant star HD 122563 has been obtained by us at McDonald Observatory.We measure the asymmetries and