结合多源数据对 OGLE-III 早期预警系统数据库中异常引力微透镜事件的重新分析
地球与行星天体物理
2015-06-24 v2
摘要
我们重新分析了 2004-2008 年期间 OGLE 透镜巡天观测并发布的异常事件列表中的微透镜事件。为了检查可能存在的简并解并提取额外信息，我们基于其他巡天及后续观测的组合数据开展了分析，并考虑了高阶效应。在已分析的事件中，我们展示了 8 个事件的分析结果，这些事件要么被识别出新的解，要么获得了额外信息。我们发现，此前对 5 个事件的双源解释用双透镜模型解释更为恰当。这些事件包括 OGLE-2006-BLG-238、OGLE-2007-BLG-159、OGLE-2007-BLG-491、OGLE-2008-BLG-143 和 OGLE-2008-BLG-210。利用覆盖焦散线穿越的额外数据，我们在 6 个事件中探测到了有限源效应，包括 OGLE-2006-BLG-215、OGLE-2006-BLG-238、OGLE-2006-BLG-450、OGLE-2008-BLG-143、OGLE-2008-BLG-210 和 OGLE-2008-BLG-513。其中，对于拥有多波段数据的 3 个事件，我们成功测量了其爱因斯坦半径。这些事件是 OGLE-2006-BLG-238、OGLE-2008-BLG-210 和 OGLE-2008-BLG-513。对于 OGLE-2008-BLG-143，我们探测到了由地球绕太阳公转引起的观测者位置变化所导致的高阶效应。此外，我们展示了由已知的近/远简并或黄道简并产生的简并解。最后，我们指出 OGLE-2006-BLG-450 和 OGLE-2008-BLG-210 的透镜双星伴星质量处于褐矮星范畴。
引用
@article{arxiv.1502.06663,
title = {Reanalyses of Anomalous Gravitational Microlensing Events in the OGLE-III Early Warning System Database with Combined Data},
author = {J. Jeong and H. Park and C. Han and A. Gould and A. Udalski and M. K. Szymański and G. Pietrzyński and I. Soszyński and R. Poleski and K. Ulaczyk and Ł. Wyrzykowski and F. Abe and D. P. Bennett and I. A. Bond and C. S. Botzler and M. Freeman and A. Fukui and D. Fukunaga and Y. Itow and N. Koshimoto and K. Masuda and Y. Matsubara and Y. Muraki and S. Namba and K. Ohnishi and N. J. Rattenbury and To. Saito and D. J. Sullivan and W. L. Sweatman and T. Sumi and D. Suzuki and P. J. Tristram and N. Tsurumi and K. Wada and N. Yamai and P. C. M. Yock and A. Yonehara and M. D. Albrow and V. Batista and J. -P. Beaulieu and J. A. R. Caldwell and A. Cassan and A. Cole and C. Coutures and S. Dieters and M. Dominik and D. Dominis Prester and J. Donatowicz and P. Fouqué and J. Greenhill and M. Hoffman and M. Huber and U. G. Jørgensen and S. R. Kane and D. Kubas and R. Martin and J. -B. Marquette and J. Menzies and C. Pitrou and K. Pollard and K. C. Sahu and C. Vinter and J. Wambsganss and A. Williams and W. Allen and G. Bolt and J. -Y. Choi and G. W. Christie and D. L. DePoy and J. Drummond and B. S. Gaudi and K. -H. Hwang and Y. K. Jung and C. -U. Lee and F. Mallia and D. Maoz and A. Maury and J. McCormick and L. A. G. Monard and D. Moorhouse and T. Natusch and E. O. Ofek and B. -G. Park and R. W. Pogge and R. Santallo and I. -G. Shin and G. Thornley and J. C. Yee and A. Allan and D. M. Bramich and M. J. Burgdorf and K. Horne and M. Hundertmark and N. Kains and C. Snodgrass and I. Steele and R. Street and Y. Tsapras},
journal= {arXiv preprint arXiv:1502.06663},
year = {2015}
}
备注
10 pages, 4 tables, 9 figures. Accepted in ApJ, Author list updated