Is there a metallicity enhancement in planet-hosting red giants?

P. Zieliński, A. Niedzielski, M. Adamów, A. Wolszczan

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Scopus citations

Abstract

The Penn State/Toruń Centre for Astronomy Search for Planets Around Evolved Stars is a high-accuracy radial velocity (RV) survey aiming at planet detection around giant stars. It is based on observations obtained with the 9.2 m Hobby-Eberly Telescope. As proper interpretation of high accuracy RV data for red giants requires complete spectral analysis of targets we perform spectral modeling of all stars included in the survey. Typically, rotation velocities and metallicities are determined in addition to stellar luminosities and temperatures, which allows us to estimate stellar ages and masses. Here we present preliminary results of metallicity studies in our sample. We search for a metallicity dependence similar to that for dwarfs by comparing our results for a sample of 22 giants earlier than K5 showing significant RV variations with a control sample of 58 relatively RV-stable stars.

Original languageEnglish (US)
Title of host publicationExtrasolar Planets in Multi-Body Systems
Subtitle of host publicationTheory and Observations
Pages201-205
Number of pages5
DOIs
StatePublished - Dec 1 2010
EventInternational Conference Eztrasolar Planets in Multi-Body Systems: Theory and Observations - Torun, Poland
Duration: Aug 25 2008Aug 29 2008

Publication series

NameEAS Publications Series
Volume42
ISSN (Print)1633-4760
ISSN (Electronic)1638-1963

Other

OtherInternational Conference Eztrasolar Planets in Multi-Body Systems: Theory and Observations
CountryPoland
CityTorun
Period8/25/088/29/08

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Engineering(all)
  • Space and Planetary Science

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