暗能量巡天Y1数据集中的星-星系分类
天体物理仪器与方法
2018-10-31 v3 宇宙学与河外天体物理
摘要
我们利用暗能量巡天（DES）第一年的宽带测光数据，对不同的星-星系分类方法进行了比较。这是通过在有和无外部“真值”信息的情况下进行广泛的测试来完成的，这些测试可移植到其他类似数据集。我们针对受此系统效应影响最大的两类DES数据科学案例——大尺度结构与银河系研究——对分类器的性能进行了广泛评估。总体而言，尽管DES Y1宇宙学研究所用的默认形态分类器足以将恒星误分类带来的系统污染维持在较低水平，但利用来自外部数据集的多历元与红外信息可将污染降低至O(1%)水平。对于银河系研究，在给定流量极限下恒星样本可扩充约20%。本工作中使用的参考星表将在发表后公开。
引用
@article{arxiv.1805.02427,
title = {Star-galaxy classification in the Dark Energy Survey Y1 dataset},
author = {I. Sevilla-Noarbe and B. Hoyle and M. J. Marchã and M. T. Soumagnac and K. Bechtol and A. Drlica-Wagner and F. Abdalla and J. Aleksić and C. Avestruz and E. Balbinot and M. Banerji and E. Bertin and C. Bonnett and R. Brunner and M. Carrasco-Kind and A. Choi and T. Giannantonio and E. Kim and O. Lahav and B. Moraes and B. Nord and A. J. Ross and E. S. Rykoff and B. Santiago and E. Sheldon and K. Wei and W. Wester and B. Yanny and T. Abbott and S. Allam and D. Brooks and A. Carnero-Rosell and J. Carretero and C. Cunha and L. da Costa and C. Davis and J. de Vicente and S. Desai and P. Doel and E. Fernandez and B. Flaugher and J. Frieman and J. Garcia-Bellido and E. Gaztanaga and D. Gruen and R. Gruendl and J. Gschwend and G. Gutierrez and D. L. Hollowood and K. Honscheid and D. James and T. Jeltema and D. Kirk and E. Krause and K. Kuehn and T. S. Li and M. Lima and M. A. G. Maia and M. March and R. G. McMahon and F. Menanteau and R. Miquel and R. L. C. Ogando and A. A. Plazas and E. Sanchez and V. Scarpine and R. Schindler and M. Schubnell and M. Smith and R. C. Smith and M. Soares-Santos and F. Sobreira and E. Suchyta and M. E. C. Swanson and G. Tarle and D. Thomas and D. L. Tucker and A. R. Walker},
journal= {arXiv preprint arXiv:1805.02427},
year = {2018}
}
备注
Reference catalogs used in this work will be made available upon publication