OGLE-2008-BLG-510：首次自动化实时探测弱微引力透镜异常——褐矮星还是恒星双星？
地球与行星天体物理
2015-06-04 v1 太阳与恒星天体物理
摘要
微引力透镜事件 OGLE-2008-BLG-510 的特征是其峰值具有明显的不对称形状，该特征由 ARTEMiS 系统实时迅速探测到。光变曲线的偏斜性似乎既符合双透镜模型，也符合双源模型，包括透镜系统可能由一颗 M 矮星和一颗绕转的褐矮星组成的可能性。对这一微引力透镜异常的探测及我们的分析表明：1) 对弱微引力透镜异常进行自动化实时探测并立即反馈是可行、高效且灵敏的；2) 相当常见的弱特征本质上带有模糊性，难以仅通过测光光变曲线解决；3) 需要一种能够找到参数空间所有特征而不仅仅是“最佳模型”的建模方法；4) 数据质量至关重要，系统性误差可能与真实特征相混淆，特别是像轨道运动特征这样的小的高阶效应。此外，越来越明显的是，具有弱特征的事件是统计研究的宝库，尽管不易利用。关于褐矮星伴星和双源微引力透镜事件明显稀缺的线索可能就隐藏于此。
引用
@article{arxiv.1203.1291,
title = {OGLE-2008-BLG-510: first automated real-time detection of a weak microlensing anomaly - brown dwarf or stellar binary?},
author = {V. Bozza and M. Dominik and N. J. Rattenbury and U. G. Joergensen and Y. Tsapras and D. M. Bramich and A. Udalski and I. A. Bond and C. Liebig and A. Cassan and P. Fouque and A. Fukui and M. Hundertmark and I. -G. Shin and S. H. Lee and J. -Y. Choi and S. -Y. Park and A. Gould and A. Allan and S. Mao and L. Wyrzykowski and R. A. Street and D. Buckley and T. Nagayama and M. Mathiasen and T. C. Hinse and S. Calchi Novati and K. Harpsoee and L. Mancini and G. Scarpetta and T. Anguita and M. J. Burgdorf and K. Horne and A. Hornstrup and N. Kains and E. Kerins and P. Kjaergaard and G. Masi and S. Rahvar and D. Ricci and C. Snodgrass and J. Southworth and I. A. Steele and J. Surdej and C. C. Thoene and J. Wambsganss and M. Zub and M. D. Albrow and V. Batista and J. -P. Beaulieu and D. P. Bennett and J. A. R. Caldwell and A Cole and K. H. Cook and C. Coutures and S. Dieters and D. Dominis Prester and J. Donatowicz and J. Greenhill and S. R. Kane and D. Kubas and J. -B. Marquette and R. Martin and J. Menzies and K. R. Pollard and K. C. Sahu and A. Williams and M. K. Szymanski and M. Kubiak and G. Pietrzynski and I. Soszynski and R. Poleski and K. Ulaczyk and D. L. DePoy and S. Dong and C. Han and J. Janczak and C. -U. Lee and R. W. Pogge and F. Abe and K. Furusawa and J. B. Hearnshaw and Y. Itow and P. M. Kilmartin and A. V. Korpela and W. Lin and C. H. Ling and K. Masuda and Y. Matsubara and N. Miyake and Y. Muraki and K. Ohnishi and Y. C. Perrott and To. Saito and L. Skuljan and D. J. Sullivan and T. Sumi and D. Suzuki and W. L. Sweatman and P. J. Tristram and K. Wada and P. C. M. Yock and A. Gulbis and Y. Hashimoto and A. Kniazev and P. Vaisanen},
journal= {arXiv preprint arXiv:1203.1291},
year = {2015}
}
备注
17 pages with 8 figures, MNRAS submitted