SIMBAD references

2011MNRAS.415..563D - Mon. Not. R. Astron. Soc., 415, 563-575 (2011/July-3)

High-resolution elemental abundance analysis of the Hyades supercluster.

DE SILVA G.M., FREEMAN K.C., BLAND-HAWTHORN J., ASPLUND M., WILLIAMS M. and HOLMBERG J.

Abstract (from CDS):

The existence of a kinematically defined moving group of stars centred at U=-40, V=-17 km/s, referred to as the Hyades supercluster, has been suggested to be the debris of an originally large star-forming event, with its core being the present-day Hyades open cluster. Using high-resolution UV-Visual Echelle Spectrograph (UVES) spectra, we present the elemental abundances for a range of alpha, Fe-peak and neutron-capture elements for 26 proposed supercluster stars. Our results show that the sample stars display a heterogeneous abundance distribution, with a clump around [Fe/H] =+0.15. We also calculate stellar radial velocities and U, V, W space velocities. Enforcing strict chemical and kinematical membership criteria, we find that four supercluster stars share the Hyades open cluster abundances and kinematics, while many of the remaining stars fit the disc field kinematics and abundance range. We discuss our findings in the context of the Hyades supercluster being a dispersed star-forming remnant, a stellar stream of purely dynamical origin or a result of several processes.

Based on observations made at the European Southern Observatory, Paranal, Chile (ESO programmes 080.D-0094(A) and 381.B-0045(A)).


Abstract Copyright: 2011 The Authors Monthly Notices of the Royal Astronomical Society2011 RAS

Journal keyword(s): Galaxy: abundances - Galaxy: disc - open clusters and associations: individual: Hyades supercluster

VizieR on-line data: <Available at CDS (J/MNRAS/415/563): table1.dat table2.dat tables.dat>

Simbad objects: 51

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2019.12.11-17:45:24

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