两台空间望远镜首次同时进行微透镜观测：$Spitzer$与$Swift$在事件OGLE-2015-BLG-1319中揭示一颗褐矮星
地球与行星天体物理
2016-11-15 v1
摘要
从多个位置对微透镜事件进行同时观测，能够打破透镜系统物理性质之间的简并性，特别是通过探索透镜平面的不同区域以及直接测量“微透镜视差”。我们报告在微透镜事件OGLE-2015-BLG-1319中发现了一颗30-55的褐矮星，其围绕一颗K型矮星运行。该系统位于距离银心方向约5 kpc处。该事件由数个地面观测组以及和进行观测，从而允许测量其物理性质。然而，该事件仍存在8重简并，特别是著名的近-远简并，因此两个透镜分量之间的投影间距约为0.25 AU或约为45 AU。这是首次由使用UVOT相机观测的微透镜事件。我们研究了敏感的微透镜参数空间区域，发现尽管对于该事件无法测量相对于地面观测的微透镜视差，但它对其他事件可能很重要。具体而言，它可用于在高放大率事件中探测附近的褐矮星和自由漂浮行星。
引用
@article{arxiv.1606.02292,
title = {First simultaneous microlensing observations by two space telescopes: $Spitzer$ & $Swift$ reveal a brown dwarf in event OGLE-2015-BLG-1319},
author = {Y. Shvartzvald and Z. Li and A. Udalski and A. Gould and T. Sumi and R. A. Street and S. Calchi Novati and M. Hundertmark and V. Bozza and C. Beichman and G. Bryden and S. Carey and J. Drummond and M. Fausnaugh and B. S. Gaudi and C. B. Henderson and T. G. Tan and B. Wibking and R. W. Pogge and J. C. Yee and W. Zhu and Y. Tsapras and E. Bachelet and M. Dominik and D. M. Bramich and A. Cassan and R. Figuera Jaimes and K. Horne and C. Ranc and R. Schmidt and C. Snodgrass and J. Wambsganss and I. A. Steele and J. Menzies and S. Mao and R. Poleski and M. Pawlak and M. K. Szymański and J. Skowron and P. Mróz and S. Kozłowski and Ł. Wyrzykowski and P. Pietrukowicz and I. Soszyński and K. Ulaczyk and F. Abe and Y. Asakura and R. K. Barry and D. P. Bennett and A. Bhattacharya and I. A. Bond and M. Freeman and Y. Hirao and Y. Itow and N. Koshimoto and M. C. A. Li and C. H. Ling and K. Masuda and A. Fukui and Y. Matsubara and Y. Muraki and M. Nagakane and T. Nishioka and K. Ohnishi and H. Oyokawa and N. J. Rattenbury and To. Saito and A. Sharan and D. J. Sullivan and D. Suzuki and P. J. Tristram and A. Yonehara and U. G. Jørgensen and M. J. Burgdorf and S. Ciceri and G. D'Ago and D. F. Evans and T. C. Hinse and N. Kains and E. Kerins and H. Korhonen and L. Mancini and A. Popovas and M. Rabus and S. Rahvar and G. Scarpetta and J. Skottfelt and J. Southworth and N. Peixinho and P. Verma and B. Sbarufatti and J. A. Kennea and N. Gehrels},
journal= {arXiv preprint arXiv:1606.02292},
year = {2016}
}
备注
28 pages, 6 figures, 2 tables. Submitted to ApJ