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WISE 1405+5534 : ウィキペディア英語版 | WISE 1405+5534
WISE 1405+5534 (full designation WISEPC J140518.40+553421.4) is a brown dwarf of spectral class Y0 (pec?), located in constellation Ursa Major at approximately 25.3 light-years from Earth. It is one of the Sun's nearest neighbors and was estimated to be only 12.4 light-years from the Sun in 2011. ==Discovery== WISE 1405+5534 was discovered in 2011 from data collected by the Wide-field Infrared Survey Explorer (WISE) in the infrared at a wavelength of 40 cm (16 in). WISE 1405+5534 has two discovery papers: ''Kirkpatrick et al. (2011)'' and ''Cushing et al. (2011)'', however, basically with the same authors and published nearly simultaneously. *Kirkpatrick et al. presented discovery of 98 new found by WISE brown dwarf systems with components of spectral types M, L, T and Y, among which also was WISE 1405+5534.〔These 98 brown dwarf systems are only among first, not all brown dwarf systems, discovered from data, collected by WISE: six discoveries were published earlier (however, also listed in Kirkpatrick et al. (2011)) in Mainzer et al. (2011) and Burgasser et al. (2011), and the other discoveries were published later.〕 *Cushing et al. presented discovery of seven brown dwarfs—one of T9.5 type, and six of Y-type—first members of the Y spectral class, ever discovered and spectroscopically confirmed, including "archetypal member" of the Y spectral class WISE 1828+2650, and WISE 1405+5534. These seven objects are also the faintest seven of 98 brown dwarfs, presented in ''Kirkpatrick et al. (2011)''.
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