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2018PASP..130b4201A - Publ. Astron. Soc. Pac., 130, part no 2, 4201-24201 (2018/February-0)

The relationship of sodium and oxygen in Galactic Field RR Lyrae stars.

ANDRIEVSKY S., WALLERSTEIN G., KOROTIN S., LYASHKO D., KOVTYUKH V., TSYMBAL V., DAVIS C.E., GOMEZ T., HUANG W. and FARRELL E.M.

Abstract (from CDS):

We analyzed 62 high-resolution spectra of 30 Galactic Field RR Lyrae-type stars with the aim of deriving their atmospheric parameters (Teff, logg, Vt), metallicity ([Fe/H]), radial velocities, and NLTE abundances of oxygen and sodium. We found that there is no clear anti-correlation between [O/Fe] and [Na/Fe] as is seen in globular clusters. On this basis, we conclude that the majority of field RR Lyrae-type stars should hardly be considered to be remnants of the dissolution of globular clusters.

Abstract Copyright: © 2017. The Astronomical Society of the Pacific. All rights reserved.

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Simbad objects: 34

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