斯巴鲁铅笔束探测m_R~27外海王星天体
A Subaru Pencil-beam Search for m_R~27 Trans-neptunian bodies
摘要：
我们提出的结果档案搜索的跨海王星对象（TNOs）在黄道领域观察斯巴鲁在2002年。搜索的深度使我们能够找到20个新的TNO，其幅度在R=24和27之间。我们用双幂律模型拟合数据，亮和暗的幂律指数最可能的值分别为α_1 =0.73 - 0.09 ^{+0.08}和α_2 =0.20 - 0.14 ^{+0.12};在R=23处的微分数密度为sigma_{23} =1.46_{-0.12}^{+0.14}，断裂幅度为R_{eq} =25.0_{-0.6}^{+0.8}。这是迄今为止对TNO光度函数中断的最精确测量。假设4%的膨胀系数，大小分布的突变对应于D = 90+-30 km的直径。
英文摘要：
We present the results of an archival search for Trans-neptunian objects (TNOs) in an ecliptic field observed with Subaru in 2002. The depth of the search allowed us to find 20 new TNOs with magnitudes between R=24 and 27. We fit a double power law model to the data; the most likely values for the bright and faint power law exponents are alpha_1=0.73_{-0.09}^{+0.08} and alpha_2=0.20_{-0.14}^{+0.12}; the differential number density at R=23 is sigma_{23}=1.46_{-0.12}^{+0.14} and the break magnitude is R_{eq}=25.0_{-0.6}^{+0.8}. This is the most precise measurement of the break in the TNO luminosity function to date. The break in the size distribution corresponds to a diameter of D = 90+-30 km assuming a 4% albedo.
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