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WISE 1541-2250

WISEPA J154151.66-225025.2
观测资料
历元 MJD 55424.68[1]
星座 天秤座
星官
赤经 15h 41m 51.57s[1]
赤纬 -22° 50′ 25.03″[1]
视星等(V) 21.16 ± 0.36 (filter J)[2]
特性
光谱分类Y0[1]
天体测定
自行 (μ) 赤经:111[1] mas/yr
赤纬:-1584[1] mas/yr
视差 (π)351 ± 108[1] mas
距离approx. 9 ly
(approx. 2.8 pc)
详细资料
质量12 (8—12) 木星质量[2] M
半径1.01 (1.01—1.07) 木星半径[2] R
表面重力 (log g)4.50 (4.25−4.5)[2]
温度350[2] K
其他命名
WISEPA J154151.66-225025.2[1], WISEP J1541-2250[2], WISE J1541-2250[1]

WISE 1541-2250,全称为WISEPA J154151.66-225025.2,是广域红外线巡天探测卫星于2011年在天秤座发现的一颗棕矮星。它距离太阳约9光年,是已知的距地球最近的棕矮星,也是距地球第七近的恒星系统,略远于最近的南门二两倍的距离。对WISE 1541-2250的光谱光度测量显示它距离地球8.2秒差距(26.7光年),而以地球围绕太阳公转1.2年为基线的三角视差法测量出其视差为0.351 ± 0.108角秒,因此可计算出它的距离为2.8 +1.3/-0.6秒差距(9.3 +4.1/-2.2光年),这个距离大约落在用光谱光度测量出的距离的三个标准差水平[1]

WISE 1541-2250和WISE 0410+1502WISE 1405+5534WISE 1738+2732WISE 1828+2650以及WISE 2056+1459一起被公布,这六颗恒星是人类发现的第一批的Y型棕矮星,Y型是最低温的恒星光谱类型,WISE 1541-2250的表面温度只有350K

相关条目

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参考文献

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  1. ^ 1.00 1.01 1.02 1.03 1.04 1.05 1.06 1.07 1.08 1.09 Kirkpatrick, J. Davy; Cushing; Gelino; Griffith; Skrutskie; Marsh; Wright; Mainzer; Eisenhardt; McLean; Thompson; Bauer; Benford; Bridge; Lake; Petty; Stanford; Tsai; Bailey; Beichman; Bochanski; Burgasser; Capak; Cruz; Hinz; Kartaltepe; Knox; Manohar; Masters; Morales-Calderónn; Prato; Rodigas; Salvato; Schurr; Scoville; Simcoe; Stapelfeldt; Stern; Stock; Vacca. The First Hundred Brown Dwarfs Discovered by the Wide-field Infrared Survey Explorer (WISE). 2011. arXiv:1108.4677v1可免费查阅 [astro-ph.SR].  cite arXiv模板填写了不支持的参数 (帮助)
  2. ^ 2.0 2.1 2.2 2.3 2.4 2.5 Cushing, Michael C.; Kirkpatrick; Gelino; Griffith; Skrutskie; Mainzer; Marsh; Beichman; Burgasser; Prato; Simcoe; Marley; Saumon; Freedman; Eisenhardt; Wright. THE DISCOVERY OF Y DWARFS USING DATA FROM THE WIDE-FIELD INFRARED SURVEY EXPLORER (WISE). 2011. arXiv:1108.4678v1可免费查阅 [astro-ph.SR].  cite arXiv模板填写了不支持的参数 (帮助)

外部链接

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WISE 1541-2250
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