Oxygen abundance in Galactic disc Cepheids

DOI

We performed a non-local thermodynamic equilibrium (NLTE) analysis of the infrared oxygen triplet for a large number of Cepheid spectra obtained with the Hobby-Eberly Telescope. These data were combined with our previous NLTE results for stars observed with the Max Planck Gesellschaft Telescope with the aim of investigating the oxygen abundance distribution in the Galactic thin disc. We found the slope of the radial (O/H) distribution to be equal -0.058dex/kpc. However, we found some evidence that the distribution might become flatter in the outer parts of the disc. This is supported by the results of other authors who have studied open clusters, planetary nebulae and Hii regions. Some mechanisms of flattening are discussed.

Cone search capability for table J/MNRAS/444/3301/table1 (Parameters and abundances for program Cepheids)

Identifier
DOI http://doi.org/10.26093/cds/vizier.74443301
Source https://dc.g-vo.org/rr/q/lp/custom/CDS.VizieR/J/MNRAS/444/3301
Related Identifier https://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/444/3301
Related Identifier https://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/444/3301
Metadata Access http://dc.g-vo.org/rr/q/pmh/pubreg.xml?verb=GetRecord&metadataPrefix=oai_b2find&identifier=ivo://CDS.VizieR/J/MNRAS/444/3301
Provenance
Creator Korotin S.A.; Andrievsky S.M.; Luck R.E.; Lepine J.R.D.; Maciel W.J.,Kovtyukh V.V.
Publisher CDS
Publication Year 2015
Rights https://cds.unistra.fr/vizier-org/licences_vizier.html
OpenAccess true
Contact CDS support team <cds-question(at)unistra.fr>
Representation
Resource Type Dataset; AstroObjects
Discipline Astrophysics and Astronomy; Galactic and extragalactic Astronomy; Interdisciplinary Astronomy; Natural Sciences; Physics; Stellar Astronomy