The atmospheric parameters of FGK stars using wavelet analysis of CORALIE spectra

Author： Gill S.   Maxted P. F. L.   Smalley B.  

Publisher： Edp Sciences

E-ISSN： 1432-0746|612|issue|A111-A111

ISSN： 0004-6361

Source： Astronomy & Astrophysics, Vol.612, Iss.issue, 2018-05, pp. : A111-A111

Disclaimer: Any content in publications that violate the sovereignty, the constitution or regulations of the PRC is not accepted or approved by CNPIEC.

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Abstract

Context. Atmospheric properties of F-, G- and K-type stars can be measured by spectral model fitting or with the analysis of equivalent width (EW) measurements. These methods require data with good signal-to-noise ratios (S/Ns) and reliable continuum normalisation. This is particularly challenging for the spectra we have obtained with the CORALIE échelle spectrograph for FGK stars with transiting M-dwarf companions. The spectra tend to have low S/Ns, which makes it difficult to analyse them using existing methods.

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