92 AU 处一个大散射盘天体的发现与物理表征
地球与行星天体物理
2017-04-19 v2
摘要
我们报告了对可能的矮行星 \UZ\（“DeeDee”）的观测与物理表征，这是一个在 92 AU 处发现的运动学上脱离的跨海王星天体。该天体目前是距离第二远的已知跨海王星天体（具有已报道的轨道要素），仅矮行星 Eris 比其更远。该天体是在 2014 至 2016 年间暗能量巡天（Dark Energy Survey）收集的数据中以 波段星等 23.0 被发现的。其 1140 年轨道的 。它将在 2142 年到达 38 AU 的近日点距离。其轨道积分显示其在 Gyr 时间尺度上动力学稳定，仅与海王星有微弱相互作用。我们利用 ALMA 进行了后续观测，使用 3 小时在源积分时间测量该天体在 Rayleigh–Jeans 尾部的热发射。信号以 7 显著性被探测到，由此我们假定球体且表面性质均匀，确定了 波段反照率为 百分比，直径为 ~km。
引用
@article{arxiv.1702.00731,
title = {Discovery and Physical Characterization of a Large Scattered Disk Object at 92 AU},
author = {David Gerdes and Masao Sako and Stephanie Hamilton and Ke Zhang and Tali Khain and Juliette Becker and James Annis and William Wester and Gary Bernstein and Colin Scheibner and Lynus Zullo and Fred Adams and Edwin Bergin and Alistair Walker and J. H. Mueller and T. Abbott and Filipe Abdalla and Sahar Allam and K. Bechtol and Aurelien Benoit-Lévy and Emmanuel Bertin and David Brooks and David Burke and A. Rosell and M. Kind and Jorge Carretero and Carlos Cunha and Luiz da Costa and S. Desai and H. Thomas Diehl and Tim Eifler and Brenna Flaugher and Joshua Frieman and J. Garc'ia-Bellido and Enrique Gaztanaga and Daniel Goldstein and Daniel Gruen and J. Gschwend and Gaston Gutierrez and Klaus Honscheid and D. James and Stephen M. Kent and E. Krause and Kyler Kuehn and Nikolay Kuropatkin and O. Lahav and T. Li and M. Maia and Marisa Cristina March and Jennifer Marshall and P. Martini and Felipe Menanteau and Ramon Miquel and Robert Nichol and Andres Plazas Malagón and A. Kathy Romer and Aaron Roodman and Eusebio Sanchez and Ignacio Sevilla-Noarbe and Mathew Smith and R. Smith and Marcelle Soares-Santos and Flavia Sobreira and E. Suchyta and M. Swanson and Gregory Tarle and Douglas Tucker and Y. Zhang},
journal= {arXiv preprint arXiv:1702.00731},
year = {2017}
}
备注
13 pages, 4 figures, accepted by ApJ Letters