SIMBAD references

2006AJ....132..902L - Astron. J., 132, 902-918 (2006/August-0)

The distribution of the elements in the galactic disk.

LUCK R.E., KOVTYUKH V.V. and ANDRIEVSKY S.M.

Abstract (from CDS):

This paper reports on the spectroscopic investigation of 54 Cepheids, deriving parameters and abundances. These Cepheids extend previous samples by about 35% in number and increase the amount of the Galactic disk coverage, especially in the direction of l~120°. We find that there exists in the Galactic disk at that longitude and at a solar distance of about 3-4 kpc a region that has enhanced abundances, <Fe/H]>~+0.2, with respect to the local region. A simple linear fit to all Cepheid data now extant yields a gradient d[Fe/H]/dRG=-0.068±0.003 dex.kpc–1. After consideration of the spatial abundance inhomogeneities in the sample, we conclude that the best current estimate of the overall gradient is d[Fe/H]/dRG=-0.06 dex.kpc–1.

Abstract Copyright:

Journal keyword(s): Stars: Variables: Cepheids - Galaxy: Abundances - Galaxy: Evolution - Stars: Abundances

VizieR on-line data: <Available at CDS (J/AJ/132/902): stars.dat table6.dat>

Simbad objects: 61

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