Low-resolution optical spectra of ultracool dwarfs with OSIRIS/GTC

Y Metodieva,Antoaneta Antonova,Valeri Golev,Dinko Dimitrov,D Garciaalvarez,J G Doyle

Monthly Notices of the Royal Astronomical Society（2015）

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摘要

We present the results of low-resolution optical spectroscopy with OSIRIS/GTC (Optical System for Imaging and Low Resolution Integrated Spectroscopy/Gran Telescopio Canarias) for a sample of ultracool dwarfs. For a subsample of seven objects, based on 2 Micron Sky Survey (2MASS) NIR photometric colours, a ‘photometric’ spectral type is determined and compared to the results of the optical spectros...

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关键词

stars: activity,brown dwarfs,stars: chromospheres,stars: low-mass

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