On the ages of exoplanet host stars

@article{Saffe2005OnTA,
  title={On the ages of exoplanet host stars},
  author={C. Saffe and M. N. G{\'o}mez and Carolina Chavero},
  journal={Astronomy and Astrophysics},
  year={2005},
  volume={443},
  pages={609-626}
}
We obtained spectra, covering the CaII H and K region, for 49 exoplanet host (EH) stars, observable from the southern hemisphere. We measured the chromospheric activity index, RHK. We compiled previously published values of this index for the observed objects as well as the remaining EH stars in an effort to better smooth temporal variations and derive a more representative value of the average chromospheric activity for each object. We used the average index to obtain ages for the group of EH… Expand
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References

SHOWING 1-10 OF 127 REFERENCES
A search for disks around exoplanet host stars
We have assembled a database which comprises optical and infrared (IR) photometry of Exoplanet Host stars (EHs), and constructed the spectral energy distributions (SEDs) of these stars. We useExpand
Statistical properties of exoplanets. II. Metallicity, orbital parameters, and space velocities
In this article we present a detailed spectroscopic analysis of more than 50 extra-solar planet host stars. Stellar atmospheric parameters and metallicities are derived using high resolution and highExpand
The age of the solar neighbourhood
High-quality Hipparcos data for a complete sample of nearly 12 000 main-sequence and subgiant stars, together with Padua isochrones, are used to constrain the star formation history of the solarExpand
Rotation and chromospheric emission among F, G, and K dwarfs of the Pleiades
We report and discuss high-resolution echelle spectra of more than 100 F, G, and K dwarfs in the Pleiades. Comparisons of the profiles of Hα and the Ca II infrared triplet to chromosphericallyExpand
Parent Stars of Extrasolar Planets. V. HD 75289
The results of a new spectroscopic analysis of HD 75289, recently reported to harbor a Jovian-mass planet, are presented. From high-resolution, high signal-to-noise ratio spectra, we derive [Fe/H] =Expand
The age-activity-rotation relationship in solar-type stars
We present Ca II K line chromospheric fluxes measured from high-resolution spectra in 35 G dwarf stars of 5 open clusters to determine the age-activity-rotation relationship from the young Hyades andExpand
No planet for HD 166435
The G0 V star HD 166435 has been observed by the ber-fed spectrograph ELODIE as one of the targets in the large extra-solar planet survey that we are conducting at the Observatory of Haute-Provence.Expand
A survey of chromospheric Ca II H and K emission in field stars of the solar neighborhood
Fluxes in 1 A bands at the centers of the H and K lines are being measured in main-sequence F-G-K-M stars in the northern half of the Woolley et al. (1970) 'Catalog of stars within twenty-fiveExpand
Chromospheric Activity and Ages of Solar-Type Stars
Observations of 15 solar-type stars in the intermediate-age open cluster NGC 752 are reported. A lower resolution analog of the Mount Wilson S index is shown to yield absolute chromospheric surfaceExpand
HIPPARCOS age metallicity relation of the solar neighbourhood disc stars
We derive age-metallicity relations (AMRs) and orbital parameters for the 1658 solar neighbourhood stars to which accurate distances are measured by the HIPPARCOS satellite. The sample stars compriseExpand
...
1
2
3
4
5
...