Characterizing stellar parameters from high resolution spectra of cold/young stars for SPIRou legacy survey

Logithan Kulenthirarajah (1) , Jean-François Donati (1) , Gaitee Hussain (1, 2) , J. Morin (3)

1 IRAP - Institut de recherche en astrophysique et planétologie
2 ESO - European Southern Observatory
3 LUPM - Laboratoire Univers et Particules de Montpellier

We propose to create a high resolution spectral library in the optical and infrared range with PHOENIX model atmospheres code that can compute molecular lines in order to estimate stellar parameters. The chosen grid of stellar parameters will be as follows: δT eff =25K, δlogg = 0.05, δ[M/H] = 0.05, ranging between: T eff = [2500K, 4000K], logg = [4.0, −5.5], [M/H] = [−1, −1] but first, we need to calibrate on F to K stars. We present here the preliminary tests and calibration on the Sun and 18sco. The method yield respectively T eff = 5770 ± 3K, logg = 4.458 ± 0.006 and T eff = 5763 ± 3.5K, logg = 4.451 ± 0.007

Mots clés: Stars; M dwarf; synthetic spectra; stellar parameters; PHOENIX

Domaines: Astrophysique stellaire et solaire [astro-ph.SR]

Logithan Kulenthirarajah, Jean-François Donati, Gaitee Hussain, J. Morin. Characterizing stellar parameters from high resolution spectra of cold/young stars for SPIRou legacy survey. SF2A-2017: Annual meeting of the French Society of Astronomy and Astrophysics, Jul 2017, Paris, France. pp.107-110. ⟨hal-01847188⟩