银河系盘面北部微透镜事件 Gaia16aye 中双星系统的完整轨道解
太阳与恒星天体物理
2020-01-22 v2 天体物理仪器与方法
摘要
Gaia16aye 是一个在朝向银河系盘面北部方向发现的双星微透镜事件，也是首批由 Gaia 空间任务探测并预警的微透镜事件之一。其光变曲线呈现出五次明显的增亮事件，达到 I=12 mag，并由一个望远镜网络收集的近 25,000 个数据点进行了极为详细的覆盖。我们展示了覆盖该事件演化 500 天的测光与光谱后续观测。我们采用完整的开普勒双星轨道微透镜模型，结合地球与 Gaia 绕太阳的运动，来重现这一复杂的光变曲线。测光数据使我们能够完全求解该微透镜事件，并推导出双星透镜系统完整且唯一的轨道参数集。我们还报告了在位于 L2 的地球与 Gaia 之间首次探测到的微透镜空间视差。双星系统的性质由微透镜参数导出，我们发现该系统由两颗主序星组成，质量分别为 0.570.05 和 0.360.03 ，距离 780 pc，轨道周期 2.88 年，离心率 0.30。我们还预测了该双星透镜将被 Gaia 观测到的天体测量微透镜信号，以及该双星系统的视向速度曲线。诸如 Gaia16aye 之类的事件表明了微透镜方法在除银河系核球方向之外探测包括黑洞在内的暗天体质量函数的潜力。这一案例也强调了由异构望远镜网络进行长期时域协同观测的重要性。
引用
@article{arxiv.1901.07281,
title = {Full orbital solution for the binary system in the northern Galactic disc microlensing event Gaia16aye},
author = {Łukasz Wyrzykowski and P. Mróz and K. A. Rybicki and M. Gromadzki and Z. Kołaczkowski and M. Zieliński and P. Zieliński and N. Britavskiy and A. Gomboc and K. Sokolovsky and S. T. Hodgkin and L. Abe and G. F. Aldi and A. AlMannaei and G. Altavilla and A. Al Qasim and G. C. Anupama and S. Awiphan and E. Bachelet and V. Bakıs and S. Baker and S. Bartlett and P. Bendjoya and K. Benson and I. F. Bikmaev and G. Birenbaum and N. Blagorodnova and S. Blanco-Cuaresma and S. Boeva and A. Z. Bonanos and V. Bozza and D. M. Bramich and I. Bruni and R. A. Burenin and U. Burgaz and T. Butterley and H. E. Caines and D. B. Caton and S. Calchi Novati and J. M. Carrasco and A. Cassan and V. Cepas and M. Cropper and M. Chruślińska and G. Clementini and A. Clerici and D. Conti and M. Conti and S. Cross and F. Cusano and G. Damljanovic and A. Dapergolas and G. D'Ago and J. H. J. de Bruijne and M. Dennefeld and V. S. Dhillon and M. Dominik and J. Dziedzic and O. Ereceantalya and M. V. Eselevich and H. Esenoglu and L. Eyer and R. Figuera Jaimes and S. J. Fossey and A. I. Galeev and S. A. Grebenev and A. C. Gupta and A. G. Gutaev and N. Hallakoun and A. Hamanowicz and C. Han and B. Handzlik and J. B. Haislip and L. Hanlon and L. K. Hardy and D. L. Harrison and H. J. van Heerden and V. L. Hoette and K. Horne and R. Hudec and M. Hundertmark and N. Ihanec and E. N. Irtuganov and R. Itoh and P. Iwanek and M. D. Jovanovic and R. Janulis and M. Jelínek and E. Jensen and Z. Kaczmarek and D. Katz and I. M. Khamitov and Y. Kilic and J. Klencki and U. Kolb and G. Kopacki and V. V. Kouprianov and K. Kruszyńska and S. Kurowski and G. Latev and C-H. Lee and S. Leonini and G. Leto and F. Lewis and Z. Li and A. Liakos and S. P. Littlefair and J. Lu and C. J. Manser and S. Mao and D. Maoz and A. Martin-Carrillo and J. P. Marais and M. Maskoliūnas and J. R. Maund and P. J. Meintjes and S. S. Melnikov and K. Ment and P. Mikołajczyk and M. Morrell and N. Mowlavi and D. Moździerski and D. Murphy and S. Nazarov and H. Netzel and R. Nesci and C. -C. Ngeow and A. J. Norton and E. O. Ofek and E. Pakstienė and L. Palaversa and A. Pandey and E. Paraskeva and M. Pawlak and M. T. Penny and B. E. Penprase and A. Piascik and J. L. Prieto and J. K. T. Qvam and C. Ranc and A. Rebassa-Mansergas and D. E. Reichart and P. Reig and L. Rhodes and J. -P. Rivet and G. Rixon and D. Roberts and P. Rosi and D. M. Russell and R. Zanmar Sanchez and G. Scarpetta and G. Seabroke and B. J. Shappee and R. Schmidt and Y. Shvartzvald and M. Sitek and J. Skowron and M. Śniegowska and C. Snodgrass and P. S. Soares and B. van Soelen and Z. T. Spetsieri and A. Stankeviciūtė and I. A. Steele and R. A. Street and J. Strobl and E. Strubble and H. Szegedi and L. M. Tinjaca Ramirez and L. Tomasella and Y. Tsapras and D. Vernet and S. Villanueva and O. Vince and J. Wambsganss and I. P. van der Westhuizen and K. Wiersema and D. Wium and R. W. Wilson and A. Yoldas and R. Ya. Zhuchkov and D. G. Zhukov and J. Zdanavicius and S. Zoła and A. Zubareva},
journal= {arXiv preprint arXiv:1901.07281},
year = {2020}
}
备注
accepted for publication in A&A, 24 pages, 10 figures, tables with the data will be available electronically