暗能量巡天科学验证数据中六个强透镜系统的观测与确认
宇宙学与河外天体物理
2016-08-17 v1 星系天体物理
摘要
我们报告了在暗能量巡天（DES）数据中发现的首批星系群和星系团尺度的强引力透镜系统的观测与确认。通过对科学验证（SV）季数据的目视检查，我们确定了53个候选系统。随后，我们利用双子座南望远镜上的双子座多目标光谱仪（GMOS）和麦哲伦/巴德望远镜上的稻森-麦哲伦面相机与光谱仪（IMACS），对21个候选体进行了光谱后续观测。通过此次后续观测，我们确认了六个候选体为引力透镜：其中三个系统为新发现，其余三个先前已知。在21个被观测的候选体中，其余15个要么未在光谱观测中探测到，要么被观测到但未显示连续谱发射（或光谱特征），要么被排除为透镜系统。确认的样本包含一个星系群尺度和五个星系团尺度的透镜。被透镜化的源红移范围为z ~ 0.80-3.2，i波段面亮度i_{SB} ~ 23-25 mag/sq.-arcsec.（2"孔径）。对于六个系统中的每一个，我们估计了爱因斯坦半径和包围质量，其范围分别为~ 5.0 - 8.6"和~ 7.5 x 10^{12} - 6.4 x 10^{13}太阳质量。
引用
@article{arxiv.1512.03062,
title = {Observation and Confirmation of Six Strong Lensing Systems in The Dark Energy Survey Science Verification Data},
author = {B. Nord and E. Buckley-Geer and H. Lin and H. T. Diehl and J. Helsby and N. Kuropatkin and A. Amara and T. Collett and S. Allam and G. Caminha and C. De Bom and S. Desai and H. Dúmet-Montoya and M. Elidaiana da S. Pereira and D. A. Finley and B. Flaugher and C. Furlanetto and H. Gaitsch and M. Gill and K. W. Merritt and A. More and D. Tucker and E. S. Rykoff and E. Rozo and F. B. Abdalla and A. Agnello and M. Auger and R. J. Brunner and M. Carrasco Kind and F. J. Castander and C. E. Cunha and L. N. da Costa and R. Foley and D. W. Gerdes and K. Glazebrook and J. Gschwend and W. Hartley and R. Kessler and D. Lagattuta and G. Lewis and M. A. G. Maia and M. Makler and F. Menanteau and A. Niernberg and D. Scolnic and J. D. Vieira and R. Gramillano and T. M. C. Abbott and M. Banerji and A. Benoit-Lévy and D. Brooks and D. L. Burke and D. Capozzi and A. Carnero Rosell and J. Carretero and C. B. D'Andrea and J. P. Dietrich and P. Doel and A. E. Evrard and J. Frieman and E. Gaztanaga and D. Gruen and K. Honscheid and D. J. James and K. Kuehn and T. S. Li and M. Lima and J. L. Marshall and P. Martini and P. Melchior and R. Miquel and E. Neilsen and R. C. Nichol and R. Ogando and A. A. Plazas and A. K. Romer and M. Sako and E. Sanchez and V. Scarpine and M. Schubnell and I. Sevilla-Noarbe and R. C. Smith and M. Soares-Santos and F. Sobreira and E. Suchyta and M. E. C. Swanson and G. Tarle and J. Thaler and A. R. Walker and W. Wester and Y. Zhang and the DES Collaboration},
journal= {arXiv preprint arXiv:1512.03062},
year = {2016}
}
备注
17 pages, 7 figures, 4 tables; submitted to ApJ