Oxygen, α-element and iron abundance distributions in the inner part of the Galactic thin disc

Abstract

We derived elemental abundances in 27 Cepheids, the great majority situated within a zone of Galactocentric distances ranging from 5 to 7 kpc. One star of our sample, SU Sct, has a Galactocentric distance of about 3 kpc, and thus falls in a poorly investigated region of the inner thin disc. Our new results, combined with data on abundances in the very central part of our Galaxy taken from literature, show that iron, magnesium, silicon, sulfur, calcium and titanium LTE abundance radial distributions, as well as NLTE distribution of oxygen reveal a plateau-like structure or even positive abundance gradient in the region extending from the Galactic center to about 5 kpc.

References in corpus (25)

• The Chemical Evolution of the Galaxy: the two-infall model
• Chemodynamical evolution of the Milky Way disk I: The solar vicinity
• A new calibration of Galactic Cepheid Period-Luminosity relations from B to K bands, and a comparison to LMC PL relations
• On the fine structure of the Cepheid metallicity gradient in the Galactic thin disk
• Studies of Diffuse Interstellar Bands. V. Pairwise Correlations of Eight Strong DIBs and Neutral Hydrogen, Molecular Hydrogen, and Color Excess
• Cepheid Period-Radius and Period-Luminosity Relations and the Distance to the LMC
• Using Cepheids to determine the galactic abundance gradient I. The solar neighbourhood
• Classical Cepheid Pulsation Models. X. The Period-Age Relation
• Chemical Abundances of Luminous Cool Stars in the Galactic Center from High-Resolution Infrared Spectroscopy
• Using Cepheids to determine the galactic abundance gradient II. Towards the galactic center
• The First Stellar Abundance Measurements in the Galactic Center: the M Supergiant IRS 7
• Using Cepheids to determine the galactic abundance gradient. III.First results for the outer disc
• The Distribution of the Elements in the Galactic Disk II. Azimuthal and Radial Variation in Abundances from Cepheids
• Stellar Iron Abundances at the Galactic Center
• Star Formation and Metallicity Gradients in Semi-analytic Models of Disk Galaxy Formation
• The chemical abundances in the Galactic Centre from the atmospheres of Red Supergiants
• Oxygen abundance distribution in Galactic disc
• On the metallicity distribution of classical Cepheids in the Galactic inner disk
• The role of the Galactic bar in the chemical evolution of the Milky Way
• Properties of satellite galaxies in the SDSS photometric survey: luminosities, colours and projected number density profiles
• Chemical Abundances of M giants in the Galactic Center: a Single Metal-Rich Population with Low [alpha/Fe]
• On the Application of Wesenheit Function in Deriving Distance to Galactic Cepheids
• Barium Abundances in Cepheids
• A Galaxy Model from 2MASS Star Counts in the Whole Sky Including the Plane
• The role of massive stars in galactic chemical evolution

Cited by in corpus (28)

• The Gaia-ESO Survey: radial distribution of abundances in the Galactic disc from open clusters and young field stars
• The Cepheid period -- luminosity -- metallicity relation based on Gaia DR2 data
• Revisiting the radial abundance gradients of nitrogen and oxygen of the Milky Way
• The Gaia-ESO Survey: Probes of the inner disk abundance gradient
• Cepheid Metallicity in the Leavitt Law (C-MetaLL) survey: I. HARPS-N@TNG spectroscopy of 47 Classical Cepheid and 1 BL Her variables
• On the neutron-capture elements across the Galactic thin disk using Cepheids
• Magnesium and silicon in interstellar dust: an X-ray overview
• Detailed chemical composition of classical Cepheids in the LMC cluster NGC 1866 and in the field of the SMC
• The time evolution of the Milky Way's oxygen abundance gradient
• High-resolution abundance analysis of HD 140283
• Oxygen, $\alpha$-element and iron abundance distributions in the inner part of the Galactic thin disc. II
• First metallicity determination from Near-Infrared spectra for five obscured Cepheids discovered in the inner Disk
• Analysing the spectral energy distributions of Galactic classical Cepheids
• Impact of distance determinations on Galactic structure. I. Young and intermediate-age tracers
• The last 5 Gyr of Galactic chemical evolution based on H II region abundances derived from a temperature independent method
• Spectroscopic properties of a two-dimensional time-dependent Cepheid model II. Determination of stellar parameters and abundances
• CNO abundances and carbon isotope ratios in evolved stars of the open clusters NGC 2324, NGC 2477, and NGC 3960
• Breaks in surface brightness profiles and radial abundance gradients in the discs of spiral galaxies
• Electron Densities and Nitrogen Abundances in Ionized Gas Derived Using [NII] Fine-structure and Hydrogen Recombination lines
• Metallicity estimation of MW, SMC and LMC classical Cepheids from the shape of the $V$- and $I$-band light curves
• Young and Intermediate-age Distance Indicators
• A Monte Carlo based simulation of the galactic chemical evolution of the Milky Way galaxy
• Effective temperatures of classical Cepheids from line-depth ratios in the H-band
• Nitrogen Abundance Distribution in the inner Milky Way
• The flux-weighted gravity-luminosity relation of Galactic classical Cepheids
• Evolutionary status and fundamental parameters of the Cepheid V1033 Cyg
• The MAGIC project. III. Radial and azimuthal Galactic abundance gradients using classical Cepheids
• On the metallicity gradients of the Galactic disk as revealed by LSS-GAC red clump stars