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Line Profile Variations of Solar Analog Stars: Chromospheric Indexes vs. Li Abundance. The Host Star Search.

Published online by Cambridge University Press:  24 July 2015

E. M. Amazo-Gómez ,
G. Harutyunyan ,
J. D. Alvarado-Gómez ,
K. G. Strassmeier ,
M. Weber  and
T. A. Carroll
E. M. Amazo-Gómez
Affiliation:
Observatorio Astronómico Nacional de Colombia (OAN), Av. Carrera 30 No. 45-03, Bogotá-Colombia
G. Harutyunyan
Affiliation:
Leibniz-Institut für Astrophysik Potsdam (AIP), An der Sternwarte 16, 14482Potsdam-Germany
J. D. Alvarado-Gómez
Affiliation:
European Southern Observatory (ESO), Karl-Schwarzschild-Str. 2, 85748 Garching beiMünchen-Germany email: emamazog@unal.edu.co
K. G. Strassmeier
Affiliation:
Leibniz-Institut für Astrophysik Potsdam (AIP), An der Sternwarte 16, 14482Potsdam-Germany
M. Weber
Affiliation:
Leibniz-Institut für Astrophysik Potsdam (AIP), An der Sternwarte 16, 14482Potsdam-Germany
T. A. Carroll
Affiliation:
Leibniz-Institut für Astrophysik Potsdam (AIP), An der Sternwarte 16, 14482Potsdam-Germany
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Abstract

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PolarBase contains stellar spectropolarimetric data collected with the NARVAL & ESPaDOnS instruments (Petit et al. 2014). Their respective spectral resolutions are 65 000 and 68 000, in spectropolarimetric mode. As the first part of this work, we use the NARVAL spectropolarimetric repositories. We selected spectra from a sample of cool stars with effective Temperature (Teff) ranging between 4900 to 6000 K. This sample contains stellar systems with and without reported exoplanets. We exploit the full wavelength range from 380 to 900 nm in order to obtain chromospheric indexes such as the Ca ii H&K S-Index, and a Ca ii IRT and Hα index. We calibrated our measurements using the Mount Wilson S-Index values. Furthermore, we employ lithium (Li) abundance measurements from the literature (Gonzalez et al. 2010; Delgado Mena et al. 2014; Israelian et al. 2004), investigating in this way a possible correlation between the chromospheric activity measurements and the Li abundance in 32 selected cool stars.

Keywords

Cool starsChromospheric IndexLi-abundanceExoplanets
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 10 , Symposium S305: Polarimetry: From the Sun to Stars and Stellar Environments , December 2014 , pp. 340 - 345
Copyright
Copyright © International Astronomical Union 2015 

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