一颗极红矮星和另外两颗邻近的L矮星候选者,之前在2MASS、WISE和其他巡天中被忽略了
An extremely red and two other nearby L dwarf candidates previously overlooked in 2MASS, WISE, and other surveys
摘要:
我们提出了三个新的附近的L矮星候选人,发现在一个持续的组合颜色/自行搜索使用WISE,2MASS,和其他调查数据,其中我们包括扩展WISE源,并期待更接近银河平面区域。它们的光谱类型和距离是通过与著名的三角对称L型矮星的光度比较来估算的。第一个天体是2MASS J07555430 - 3259589,是一颗极红的L7.5p矮星候选者,测光距离约为16 pc。它的位置、自行和距离与属于Carina-Near年轻移动群一致。第二个,2MASS J07414279 - 0506464,在盖亚DR1中被解析为一个近距离双星(间隔0.3角秒),我们将其归类为一个由两个19 pc的L5矮星组成的等质量双星候选者。我们最近的新邻居,2MASS J19251275 + 0700362,是一个L7矮星候选者,10 pc。
英文摘要:
We present three new nearby L dwarf candidates, found in a continued combined color/proper motion search using WISE, 2MASS, and other survey data, where we included extended WISE sources and looked closer to the Galactic plane region. Their spectral types and distances were estimated from photometric comparisons to well-known L dwarfs with trigonometric parallaxes. The first object, 2MASS J07555430-3259589, is an extremely red L7.5p dwarf candidate at a photometric distance of about 16 pc. Its position, proper motion and distance are consistent with membership in the Carina-Near young moving group. The second one, 2MASS J07414279-0506464, is resolved in Gaia DR1 as a close binary (separation 0.3 arcsec), and we classify it as a equal-mass binary candidate consisting of two L5 dwarfs at 19 pc. Our nearest new neighbor, 2MASS J19251275+0700362, is an L7 dwarf candidate at 10 pc.
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