C and O isotopic ratios in Arcturus and Aldebaran Virtual Observatory Resource

Authors
  1. Abia C.
  2. Palmerini S.
  3. Busso M.
  4. Cristallo S.
  5. Published by
    CDS
Abstract

We re-analyzed the carbon and oxygen isotopic ratios in the atmospheres of the two bright K giants Arcturus ({alpha} Boo) and Aldebaran ({alpha} Tau). These stars are in the evolutionary stage following the first dredge-up (FDU). Previous determinations (dating back more than 20 years) of their ^16^O/^18^O ratios showed a rough agreement with FDU expectations; however, the estimated ^16^O/^17^O and ^12^C/^13^C ratios were lower than in the canonical predictions for red giants. Today these anomalies are interpreted as signs of the occurrence of non-convective mixing episodes. We therefore re-investigated this problem to verify whether the observed data can be reproduced in this scenario and if the fairly well determined properties of the two stars can help us in fixing the uncertain parameters that characterize non-convective mixing and in constraining its physical nature.

Keywords
  1. Giant stars
  2. Late-type stars
  3. Chemical abundances
Bibliographic source Bibcode
2012A&A...548A..55A
See also HTML
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/548/A55
IVOA Identifier IVOID
ivo://CDS.VizieR/J/A+A/548/A55
Document Object Identifer DOI
doi:10.26093/cds/vizier.35480055

Access

Web browser access HTML
http://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/548/A55
https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/548/A55
http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/548/A55
IVOA Table Access TAP
http://tapvizier.cds.unistra.fr/TAPVizieR/tap
Run SQL-like queries with TAP-enabled clients (e.g., TOPCAT).

History

2013-03-22T13:13:14Z
Resource record created
2013-03-22T13:13:14Z
Created
2013-07-24T06:27:25Z
Updated

Contact

Name
CDS support team
Postal Address
CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France
E-Mail
cds-question@unistra.fr