8-12 juin, 2014


New observations of 15 chemically peculiar stars with ESPaDOnS

Viktor Khalack (Université de Moncton)

Francis LeBlanc, Université de Moncton

We present the first results for the estimation of gravity, effective temperature and radial velocity of 15 poorly studied chemically peculiar stars recently observed with the spectropolarimeter ESPaDOnS at CFHT. A grid of theoretical stellar atmosphere models with the corresponding fluxes has been calculated using the PHOENIX code for effective temperature in the range from 5000K to 15000K and for the logarithm of surface gravity in the range from 3.0 to 4.5. We have used these fluxes to fit Balmer line profiles employing the code FITSB2 that gives estimates of the effective temperature, gravity and radial velocity for each star. To validate our method, the simulated fluxes have been used to analyse Vega's spectrum to determine its Teff and log(g) which are found to be in good agreement with the previously published data.
(doit être confirmé par le SOC)