暗能量巡天 OzDES 多光纤光谱观测：三年成果与首次数据发布
宇宙学与河外天体物理
2017-08-16 v1 星系天体物理
摘要
本文展示了 OzDES 项目前三年的成果。OzDES 是一项为期六年的计划，旨在利用英澳望远镜上的 2dF 光纤定位器和 AAOmega 光谱仪，获取暗能量巡天（DES）超新星场中天体的红移。OzDES 是一项多目标光谱巡天，在多年基线内对多个历元的多种类型目标进行观测，也是最早在发现瞬变源后不久即将其动态纳入目标列表的多目标光谱巡天之一。三年结束时，OzDES 已通过光谱证认了近 100 颗超新星，并测量了 17,000 个天体的红移，其中包括 2,566 个超新星宿主星系的红移。我们研究了测量不同类型目标红移的能力如何依赖于信噪比、星等和曝光时间，发现当每埃波长间隔的信噪比达到 2 至 3 时，红移测量成功率显著提高。我们还发现，信噪比随曝光时间的变化与长达 10 小时的叠加曝光的泊松极限非常吻合。我们利用这些结果预测了 OzDES 全期巡天的红移产出，以及未来在其他设备上开展巡天的潜在产出，例如 4 米多目标光谱望远镜（4MOST）、昴星团主焦点光谱仪（PFS）和莫纳克亚光谱探索者（MSE）。此项工作标志着 OzDES 首次数据发布，包含 14,693 个红移数据。OzDES 有望获得约 5,700 个超新星宿主星系红移的总产出。
引用
@article{arxiv.1708.04526,
title = {OzDES multifibre spectroscopy for the Dark Energy Survey: Three year results and first data release},
author = {M. J. Childress and C. Lidman and T. M. Davis and B. E. Tucker and J. Asorey and F. Yuan and T. M. C. Abbott and F. B. Abdalla and S. Allam and J. Annis and M. Banerji and A. Benoit-Levy and S. R. Bernard and E. Bertin and D. Brooks and E. Buckley-Geer and D. L. Burke and A. Carnero Rosell and D. Carollo and M. Carrasco Kind and J. Carretero and F. J. Castander and C. E. Cunha and L. N. da Costa and C. B. D'Andrea and P. Doel and T. F. Eifler and A. E. Evrard and B. Flaugher and R. J. Foley and P. Fosalba and J. Frieman and J. Garcia-Bellido and K. Glazebrook and D. A. Goldstein and D. Gruen and R. A. Gruendl and J. Gschwend and R. R. Gupta and G. Gutierrez and S. R. Hinton and J. K. Hoormann and D. J. James and R. Kessler and A. G. Kim and A. L. King and E. Kovacs and K. Kuehn and S. Kuhlmann and N. Kuropatkin and D. J. Lagattuta and G. F. Lewis and T. S. Li and M. Lima and H. Lin and E. Macaulay and M. A. G. Maia and J. Marriner and M. March and J. L. Marshall and P. Martini and R. G. McMahon and F. Menanteau and R. Miquel and A. Moller and E. Morganson and J. Mould and D. Mudd and D. Muthukrishna and R. C. Nichol and B. Nord and R. L. C. Ogando and F. Ostrovski and D. Parkinson and A. A. Plazas and S. L. Reed and K. Reil and A. K. Romer and E. S. Rykoff and M. Sako and E. Sanchez and V. Scarpine and R. Schindler and M. Schubnell and D. Scolnic and I. Sevilla-Noarbe and N. Seymour and R. Sharp and M. Smith and M. Soares-Santos and F. Sobreira and N. E. Sommer and H. Spinka and E. Suchyta and M. Sullivan and M. E. C. Swanson and G. Tarle and S. A. Uddin and A. R. Walker and W. Wester and B. R. Zhang},
journal= {arXiv preprint arXiv:1708.04526},
year = {2017}
}
备注
Accepted for publication in MNRAS. Redshift data release is available at http://www.mso.anu.edu.au/ozdes/DR1