49 new T dwarfs identified using methane imaging

作者: CV Cardoso , B Burningham , Richard Laurence Smart , L van Spaandonk , D Baker

DOI: 10.1093/MNRAS/STV380

关键词: PhysicsAstronomyPhotometry (optics)InfraredInfrared telescopeAstrophysicsSpectroscopySkyMethaneBrown dwarf

摘要: We present the discovery of 49 new photometrically classified T dwarfs from combination large infrared and optical surveys combined with follow-up Telescopio Nazionale Galileo photometry. used multiband photometry United Kingdom Infrared Telescope Sloan Digital Sky Surveys to identify possible brown dwarf candidates, which were then confirmed using methane filter have defined a photometric conversion between CH 4 s − l colour spectral type for T4–T8 based on part sample that has been followed up spectroscopy. Using differential as proxy proved be very efficient technique. Of subset 45 selected observed spectroscopically, 100 per cent dwarfs. Future deep imaging will produce samples faint spectroscopy not feasible. When broad wavelength coverage is unavailable, offers means efficiently classify candidates such just pair near-infrared images.

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