利用南极望远镜在毫米波波段对小行星的观测测量
地球与行星天体物理
2023-04-24 v2
摘要
我们展示了南极望远镜（SPT）毫米波（mm）数据中对小行星的首次测量，该望远镜主要用于研究宇宙微波背景（CMB）。我们分析了黄道面附近两个各约 deg 天区的中性地图，每个天区在一个月内由 SPTpol 相机观测约 次。我们减去给定视场所有地图的均值以去除静态天区信号，随后在已知小行星位置处对去均值地图进行平均。我们在 2.0 mm（150 GHz）处以信噪比（S/N）分别为 11.2、10.4 和 6.1 探测到三颗小行星（324）Bamberga、（13）Egeria 和（22）Kalliope；我们还在 3.2 mm（95 GHz）处以 S/N 为 4.1 探测到（324）Bamberga。我们约束了这些小行星的有效发射率、亮温和光变曲线调制幅度。我们对（324）Bamberga 和（13）Egeria 的流量密度测量与预测大致相符，而对（22）Kalliope 的测量表明流量较低，对应于 2.0 mm 处有效发射率为 、3.2 mm 处小于 。我们预测了其他 SPT 数据集中可探测的小行星，并发现与近期 SPT-3G 相机数据中对（772）Tanete 和（1093）Freda 的探测结果吻合良好，SPT-3G 的制图速度约为 SPTpol 的 。本工作是 CMB 巡天数据中针对小行星的首次聚焦分析，表明我们可将历史与未来数据集重新用于小行星研究。未来的 SPT 测量有助于约束更大小行星群体的表面性质分布。
引用
@article{arxiv.2202.01406,
title = {Asteroid Measurements at Millimeter Wavelengths with the South Pole Telescope},
author = {P. M. Chichura and A. Foster and C. Patel and N. Ossa-Jaen and P. A. R. Ade and Z. Ahmed and A. J. Anderson and M. Archipley and J. E. Austermann and J. S. Avva and L. Balkenhol and P. S. Barry and R. Basu Thakur and J. A. Beall and K. Benabed and A. N. Bender and B. A. Benson and F. Bianchini and L. E. Bleem and F. R. Bouchet and L. Bryant and K. Byrum and J. E. Carlstrom and F. W. Carter and T. W. Cecil and C. L. Chang and P. Chaubal and G. Chen and H. C. Chiang and H. -M. Cho and T-L. Chou and R. Citron and J. -F. Cliche and T. M. Crawford and A. T. Crites and A. Cukierman and C. M. Daley and E. V. Denison and K. Dibert and J. Ding and M. A. Dobbs and D. Dutcher and W. Everett and C. Feng and K. R. Ferguson and J. Fu and S. Galli and J. Gallicchio and A. E. Gambrel and R. W. Gardner and E. M. George and N. Goeckner-Wald and R. Gualtieri and S. Guns and N. Gupta and R. Guyser and T. de Haan and N. W. Halverson and A. H. Harke-Hosemann and N. L. Harrington and J. W. Henning and G. C. Hilton and E. Hivon and G. P. Holder and W. L. Holzapfel and J. C. Hood and D. Howe and J. D. Hrubes and N. Huang and J. Hubmayr and K. D. Irwin and O. B. Jeong and M. Jonas and A. Jones and T. S. Khaire and L. Knox and A. M. Kofman and M. Korman and D. L. Kubik and S. Kuhlmann and C. -L. Kuo and A. T. Lee and E. M. Leitch and D. Li and A. Lowitz and C. Lu and D. P. Marrone and J. J. McMahon and S. S. Meyer and D. Michalik and M. Millea and L. M. Mocanu and J. Montgomery and C. Corbett Moran and A. Nadolski and T. Natoli and H. Nguyen and J. P. Nibarger and G. Noble and V. Novosad and Y. Omori and S. Padin and Z. Pan and P. Paschos and S. Patil and J. Pearson and K. A. Phadke and C. M. Posada and K. Prabhu and C. Pryke and W. Quan and A. Rahlin and C. L. Reichardt and D. Riebel and B. Riedel and M. Rouble and J. E. Ruhl and B. R. Saliwanchik and J. T. Sayre and K. K. Schaffer and E. Schiappucci and E. Shirokoff and C. Sievers and G. Smecher and J. A. Sobrin and A. Springmann and A. A. Stark and J. Stephen and K. T. Story and A. Suzuki and C. Tandoi and K. L. Thompson and B. Thorne and C. Tucker and C. Umilta and L. R. Vale and T. Veach and J. D. Vieira and G. Wang and N. Whitehorn and W. L. K. Wu and V. Yefremenko and K. W. Yoon and M. R. Young},
journal= {arXiv preprint arXiv:2202.01406},
year = {2023}
}
备注
21 pages, 9 figures