The 19th Cambridge Workshop on Cool Stars, Stellar Systems, and the Sun
Published July 12, 2016 | Version v1
Poster Open

The Line Bisectors Of G Type Giant Star HD199719

Authors/Creators

  • 1. Ankara University, Ankara, Turkey
  • 2. Tokyo Institute of Technology, Tokyo, Japan
  • 3. Kazan Federal University, Kazan, Russia
  • 4. Okayama Astrophysical Observatory, Okayama, Japan
  • 5. Ege University, İzmir, Turkey

Contributors

  • 1. Uppsala University, University of North Georgia

Description

We present an analysis of spectral line bisector variations for HD199719, which has been observed at the Turkish National Observatory (TUG) using the Coude Echelle Spectrograph equipped with an iodine absorption cell. We discuss their influence on precise radial velocity measurements in the search for exoplanets. The line bisectors are derived from mean absorption profiles obtained by cross correlation of the stellar spectra using a mask, and by using lines that are located outside the iodine absorption region. No radial velocity variations have been found that are associated with the bisector variations. Finally, the equivalent width (EW) measurements of the Hα were also analysed for stellar activity.

Notes

Poster #122

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Additional details

References

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