Chemical composition of giants from two moving groups

Abstract

We present stellar parameters of 19 K-type giants and their abundances of 13 chemical elements (Al, Ba, Ca, Fe, K, Mg, Mn, Na, Ni, Sc, Si, Ti and V), selected from two moving groups, covering the metallicity range of -0.6 < [Fe/H] < 0.2, based on high resolution spectra. Most elemental abundances show similar trends with previous studies except for Al, Na and Ba, which are affected by evolution seriously. The abundance ratios of [Na/Mg] increase smoothly with higher [Mg/H] and [Al/Mg] decrease slightly with increasing [Mg/H]. [Mg/Ba] show distinction between these two moving groups which is mainly induced by chemical evolution and partly by kinematic effects. The inhomogeneous metallicity of each star from the moving groups demonstrate that these stars have different chemical origins before they were kinematically aggregated and favor the dynamical resonant theory.

11 pages, 11 figures, accepted for publication in MNRAS

References in corpus (27)

• Maps of Dust IR Emission for Use in Estimation of Reddening and CMBR Foregrounds
• Evolutionary tracks and isochrones for low- and intermediate-mass stars: from 0.15 to 7 M_sun, and from Z=0.0004 to 0.03
• The Geneva-Copenhagen survey of the Solar neighbourhood: Ages, metallicities, and kinematic properties of 14,000 F and G dwarfs
• First stars V - Abundance patterns from C to Zn and supernova yields in the early Galaxy
• Local kinematics of K and M giants from Coravel/Hipparcos/Tycho-2 data. Revisiting the concept of superclusters
• The Distribution of Nearby Stars in Velocity Space Inferred from Hipparcos Data
• Population Synthesis in the Blue IV: Accurate Model Predictions for Lick Indices and UBV Colors in Single Stellar Populations
• Chemical composition of 90 F and G disk dwarfs
• The Y^2 Stellar Evolutionary Tracks
• Elemental Abundance Ratios in Stars of the Outer Galactic Disk. I. Open Clusters
• Stellar Parameters and Elemental Abundances of Late-G Giants
• Chemical abundance analysis of the Open Clusters Cr110, NGC2099 (M37), NGC2420, NGC7789 and M67 (NGC2682)
• Pieces of the puzzle: Ancient substructure in the Galactic disk
• Measuring Galactic Extinction: A Test
• Elemental abundances in the atmosphere of clump giants
• Velocity distribution of stars in the solar neighbourhood
• Origin and evolution of moving groups I. Characterization in the observational kinematic-age-metallicity space
• Chemically Tagging the HR1614 Moving Group
• The BOES spectropolarimeter for Zeeman measurements of stellar magnetic fields
• The Hyades stream: evaporated cluster or intrusion from the inner disk?
• Mg abundances in metal-poor halo stars as a tracer of early Galactic mixing
• Metal Abundances and Kinematics of Bright Metal-Poor Giants Selected from the LSE Survey: Implications for the Metal-Weak Thick Disk
• On the age heterogeneity of the Pleiades, Hyades and Sirius moving groups
• Identifying stellar streams in the 1st RAVE public data release
• Analysis of 26 Barium Stars I. Abundances
• A Catalog of Moving Group Candidates in The Solar Neighborhood
• Stellar Parameters and Chemical Abundances of G Giants

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