Planet-hosting stars chemical compositions Virtual Observatory Resource

Authors
  1. Liu F.
  2. Yong D.
  3. Asplund M.
  4. Wang H.S.
  5. Spina L.
  6. Acuna L.
  7. Melendez J.,Ramirez I.
  8. Published by
    CDS
Abstract

We present a line-by-line differential analysis of a sample of 16 planet-hosting stars and 68 comparison stars using high-resolution, high signal-to-noise ratio spectra gathered using Keck. We obtained accurate stellar parameters and high-precision relative chemical abundances with average uncertainties in Teff, logg, [Fe/H], and [X/H] of 15K, 0.034cm/s^2^, 0.012dex, and 0.025dex, respectively. For each planet host, we identify a set of comparison stars and examine the abundance differences (corrected for Galactic chemical evolution effect) as a function of the dust condensation temperature, Tcond, of the individual elements. While we confirm that the Sun exhibits a negative trend between abundance and Tcond, we also confirm that the remaining planet hosts exhibit a variety of abundance-Tcond trends with no clear dependence upon age, metallicity, or Teff. The diversity in the chemical compositions of planet-hosting stars relative to their comparison stars could reflect the range of possible planet-induced effects present in these planet hosts, from the sequestration of rocky material (refractory poor) to the possible ingestion of planets (refractory rich). Other possible explanations include differences in the time-scale, efficiency and degree of planet formation, or inhomogeneous chemical evolution. Although we do not find an unambiguous chemical signature of planet formation among our sample, the high-precision chemical abundances of the host stars are essential for constraining the composition and structure of their exoplanets.

Keywords
  1. Multiple stars
  2. Exoplanets
  3. Line intensities
  4. Chemical abundances
Bibliographic source Bibcode
2020MNRAS.495.3961L
See also HTML
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/495/3961
IVOA Identifier IVOID
ivo://CDS.VizieR/J/MNRAS/495/3961

Access

Web browser access HTML
http://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/495/3961
https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/495/3961
http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/495/3961
IVOA Table Access TAP
http://tapvizier.cds.unistra.fr/TAPVizieR/tap
Run SQL-like queries with TAP-enabled clients (e.g., TOPCAT).
IVOA Cone Search SCS
For use with a cone search client (e.g., TOPCAT).
http://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/495/3961/table1?
https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/495/3961/table1?
http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/495/3961/table1?

History

2020-11-25T13:38:27Z
Resource record created
2020-11-25T13:38:27Z
Created
2022-10-04T14:56:42Z
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