Work

Oxygen abundance distribution in the Galactic disc

Year: 2014

Type: article

Abstract: 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 -0.058 dex kpc -1 .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 H II regions.Some mechanisms of flattening are discussed.

Source: Monthly Notices of the Royal Astronomical Society

DOI: 10.1093/mnras/stu1643

Authors: S. A. Korotin, S. M. Andrievsky, R. E. Luck, J. R. D. Lépine, W. J. Maciel, V. V. Kovtyukh

Institutions: Odesa I. I. Mechnikov National University, Isaac Newton Institute, Centre National de la Recherche Scientifique, Observatoire de Paris, Galaxies, Etoiles, Physique et Instrumentation, Université Paris Diderot, Case Western Reserve University, Universidade de São Paulo

Language: English

Topic: Stellar, planetary, and galactic studies

Subfield: Astronomy and Astrophysics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: bronze

OpenAlex ID: W2155138796

FWCI: 4.476

Cites: 58

Cited by: 56

Related to: 10