Triangulum II. Not Especially Dense After All
نویسندگان
چکیده
منابع مشابه
Triangulum II. Not Especially Dense After All
Among the Milky Way satellites discovered in the past three years, TriangulumII has presented the most difficulty in revealing its dynamical status. Kirby et al. identified it as the most dark-matter-dominated galaxy known, with a mass-to-light ratio within the half-light radius of M L 360
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Laevens et al. recently discovered TriangulumII (TriII), a satellite of the Milky Way. Its Galactocentric distance is 36 kpc, and its luminosity is only L 450 . Using Keck/DEIMOS, we measured the radial velocities of six member stars within 1 2 of the center of TriII, and we found a velocity dispersion of s = + 5.1 km s v 1.4 4.0 1. We also measured the metallicities of three stars and fou...
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ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 2017
ISSN: 1538-4357
DOI: 10.3847/1538-4357/aa6570