Please use this identifier to cite or link to this item: http://hdl.handle.net/2248/7333
Title: Chemical compositions of giants in the Hyades and Sirius superclusters
Authors: Ramya, P
Reddy, B. E
Lambert, D. L
Keywords: Stars: abundances
Stars: late-type
Galaxy: disc
Galaxy: kinematics and dynamics
Galaxy: open clusters and associations: individual: Hyades supercluster
Galaxy: open clusters and associations: individual: Sirius supercluster.
Issue Date: Mar-2019
Publisher: Oxford University Press on behalf of the Royal Astronomical Society
Citation: Monthly Notices of the Royal Astronomical Society, Vol. 484, No. 1, pp. 125-145
Abstract: An abundance analysis for 20 elements from Na to Eu is reported for 34 K giants from the Hyades supercluster and for 22 K giants from the Sirius supercluster. Observed giants were identified as highly probable members of their respective superclusters by Famaey et al. Three giants each from the Hyades and Praesepe open clusters were similarly observed and analysed. Each supercluster shows a range in metallicity: −0.20 ≤ [Fe/H] ≤ +0.25 for the Hyades supercluster and −0.22 ≤ [Fe/H] ≤ +0.15 for the Sirius supercluster with the metal-rich tail of the metallicity distribution of the Hyades supercluster extending beyond that of the Sirius supercluster and spanning the metallicity of the Hyades and Praesepe cluster giants. Relative elemental abundances [El/Fe] across the supercluster giants are representative of the Galactic thin disc as determined from giants in open clusters analysed in a similar way to our approach. Judged by metallicity and age, very few and likely none of the giants in these superclusters originated in an open cluster: the pairings include the Hyades supercluster with the Hyades – Praesepe open clusters and the Sirius supercluster with the U Ma open cluster. Literature on main-sequence stars attributed to the two superclusters and the possible relation to the associated open cluster is reviewed. It is suggested that the Hyades supercluster’s main-sequence population contains few stars from the two associated open clusters. As suggested by some previous investigations, the Sirius supercluster, when tightly defined kinematically, appears to be well populated by stars shed by the U Ma open cluster.
Description: Restricted Access © Royal Astronomical Society https://doi.org/10.1093/mnras/sty3507
URI: http://prints.iiap.res.in/handle/2248/7333
ISSN: 1365-2966
Appears in Collections:IIAP Publications

Files in This Item:
File Description SizeFormat 
Chemical compositions of giants in the Hyades and Sirius superclusters.pdf
  Restricted Access
608.32 kBAdobe PDFView/Open Request a copy


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.