Chemical gradients in the Milky Way from the RAVE data. II. Giant stars

Abstract

We provide new constraints on the chemo-dynamical models of the Milky Way by measuring the radial and vertical chemical gradients for the elements Mg, Al, Si, Ti, and Fe in the Galactic disc and the gradient variations as a function of the distance from the Galactic plane ($Z$). We selected a sample of giant stars from the RAVE database using the gravity criterium 1.7$<$log g$<$2.8. We created a RAVE mock sample with the Galaxia code based on the Besan\c con model and selected a corresponding mock sample to compare the model with the observed data. We measured the radial gradients and the vertical gradients as a function of the distance from the Galactic plane $Z$ to study their variation across the Galactic disc. The RAVE sample exhibits a negative radial gradient of $d[Fe/H]/dR=-0.054$ dex kpc${}^{-1}$ close to the Galactic plane ($|Z|<0.4$ kpc) that becomes flatter for larger $|Z|$. Other elements follow the same trend although with some variations from element to element. The mock sample has radial gradients in fair agreement with the observed data. The variation of the gradients with $Z$ shows that the Fe radial gradient of the RAVE sample has little change in the range $|Z|\lesssim 0.6$ kpc and then flattens. The iron vertical gradient of the RAVE sample is slightly negative close to the Galactic plane and steepens with $|Z|$. The mock sample exhibits an iron vertical gradient that is always steeper than the RAVE sample. The mock sample also shows an excess of metal-poor stars in the [Fe/H] distributions with respect to the observed data. These discrepancies can be reduced by decreasing the number of thick disc stars and increasing their average metallicity in the Besan\c con model.

arXiv comment13 pages, 9 figures, 5 tables, A&A accepted

References in corpus (72)

• HEALPix -- a Framework for High Resolution Discretization, and Fast Analysis of Data Distributed on the Sphere
• The Geneva-Copenhagen survey of the Solar neighbourhood: Ages, metallicities, and kinematic properties of 14,000 F and G dwarfs
• Evolution of asymptotic giant branch stars II. Optical to far-infrared isochrones with improved TP-AGB models
• The Milky Way Tomography with SDSS: I. Stellar Number Density Distribution
• SEGUE: A Spectroscopic Survey of 240,000 stars with g=14-20
• The New Galaxy: Signatures of its Formation
• GAIA: Composition, Formation and Evolution of the Galaxy
• Radial Mixing in Galactic Discs
• The Chemical Evolution of the Galaxy: the two-infall model
• The Radial Velocity Experiment (RAVE): first data release
• The Field of Streams: Sagittarius and its Siblings
• The PPMXL catalog of positions and proper motions on the ICRS. Combining USNO-B1.0 and 2MASS
• Chemical evolution with radial mixing
• An absolutely calibrated effective temperature scale from the InfraRed Flux Method
• Abundance Gradients and the Formation of the Milky Way
• The second US Naval Observatory CCD Astrograph Catalog (UCAC2)
• Simulations of Galaxy Formation in a Lambda CDM Universe II: The Fine Structure of Simulated Galactic Disks
• The Milky Way Tomography with SDSS: II. Stellar Metallicity
• The age structure of stellar populations in the solar vicinity. Clues of a two-phase formation history of the Milky Way disk
• Riding the Spiral Waves: Implications of Stellar Migration for the Properties of Galactic Disks
• Late-type stars members of young stellar kinematic groups - I. Single stars
• Chemodynamical evolution of the Milky Way disk I: The solar vicinity
• A Spectroscopic Study of the Ancient Milky Way: F- and G-Type Stars in the Third Data Release of the Sloan Digital Sky Survey
• The RAdial Velocity Experiment (RAVE): Fourth data release
• A New Mechanism for Radial Migration in Galactic Disks: Spiral-Bar Resonance Overlap
• Mass models of the Milky Way
• Origin and structure of the Galactic disc(s)
• Galaxia: a code to generate a synthetic survey of the Milky Way
• The Milky Way has no thick disk
• The wobbly Galaxy: kinematics north and south with RAVE red clump giants
• The Radial Velocity Experiment (RAVE): second data release
• Chemodynamical Simulations of the Milky Way Galaxy
• Vertical distribution of Galactic disk stars I - Kinematics and metallicity
• The Distribution of the Elements in the Galactic Disk III. A Reconsideration of Cepheids from l = 30 to 250 Degrees
• Formation and Evolution of the Disk System of the Milky Way: [alpha/Fe] Ratios and Kinematics of the SEGUE G-Dwarf Sample
• Chemodynamics of the Milky Way. I. The first year of APOGEE data
• Chemical abundance analysis of the Open Clusters Cr110, NGC2099 (M37), NGC2420, NGC7789 and M67 (NGC2682)
• Radial migration in galactic disks caused by resonance overlap of multiple patterns: Self-consistent simulations
• HII Region Metallicity Distribution in the Milky Way Disk
• Chemical Cartography with APOGEE: Large-scale Mean Metallicity Maps of the Milky Way
• Elemental Abundance Ratios in Stars of the Outer Galactic Disk. IV. A New Sample of Open Clusters
• The RAdial Velocity Experiment (RAVE): Third Data Release
• Constraining Sub-Grid Physics with High-Redshift Spatially-Resolved Metallicity Distributions
• PPM-Extended (PPMX) - a catalogue of positions and proper motions
• Automated derivation of stellar atmospheric parameters and chemical abundances: the MATISSE algorithm
• Thickening of galactic disks through clustered star formation
• Metallicity Gradients in the Milky Way Disk as Observed by the SEGUE Survey
• Old open clusters in the outer Galactic disk
• A Short Scale Length for the α-Enhanced Thick Disk of the Milky Way: Evidence from Low-Latitude SEGUE Data
• Abundance gradients in the Milky Way for alpha elements, Iron peak elements, Barium, Lanthanum and Europium
• A spectroscopic survey of thick disc stars outside the solar neighbourhood
• Observational Properties of the Metal-Poor Thick Disk of the Milky Way Galaxy and Insights into Its Origins
• Elemental Abundance Ratios in Stars of the Outer Galactic Disk. III. Cepheids
• New distances to RAVE stars
• Orbital Eccentricity as a probe of Thick Disk Formation Scenarios
• Stellar diffusion in barred spiral galaxies
• Galactic abundance gradients from Cepheids : On the iron abundance gradient around 10-12 kpc
• Distance determination for RAVE stars using stellar models II: Most likely values assuming a standard stellar evolution scenario
• A new stellar chemo-kinematic relation reveals the merger history of the Milky Way disc
• Automatic stellar spectra parameterisation in the IR CaII triplet region
• The Metallicity Distribution Functions of SEGUE G and K dwarfs: Constraints for Disk Chemical Evolution and Formation
• Chemical gradients in the Milky Way from the RAVE data. I. Dwarf stars
• The RAVE catalogue of stellar elemental abundances: first data release
• The relation between chemical abundances and kinematics of the Galactic disc with RAVE
• Exploring the Morphology of RAVE Stellar Spectra
• Local stellar kinematics from RAVE data: II. Radial Metallicity Gradient
• Local stellar kinematics from RAVE data: III. Radial and Vertical Metallicity Gradients based on Red Clump Stars
• Thin disk kinematics from RAVE and the solar motion
• The Metallicity Gradient of the Thick Disk Based on Red Horizontal Branch Stars From SDSS DR8
• Metallicity Gradients of Thick Disk Dwarf Stars
• The stellar metallicity distribution of the Milky Way from the BATC survey
• Kinematics of Stellar Populations with RAVE Data

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• Cardinal kinematics: I. Rotation fields of the APOGEE Survey
• Gas accretion in Milky Way-like galaxies: temporal and radial dependencies
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