Euclid 准备：VIII. 颜色-红移关系的完整定标巡天：VLT/KMOS 观测与数据发布
星系天体物理
2021-02-03 v1 宇宙学与河外天体物理
摘要
颜色-红移关系的完整定标巡天（C3R2）是一项由 ESO 与 Keck 设备参与的光谱观测计划，旨在将星系颜色-红移关系 P(z|C) 经验定标至 Euclid 深度（i_AB=24.5），并与基于弱引力透镜宇宙学的后续第四阶段暗能量任务紧密相关。其目标是构建一组光谱定标样本，尽可能代表 Euclid 弱透镜样本中的星系。为最小化填补当前 P(z|C) 认知空白所需的光谱观测次数，我们构建了星系颜色空间的自组织映射（SOM）表示。本文呈现 C3R2 框架下获批的 ESO@VLT 大型计划首批结果，该计划使用两台 VLT 光学与近红外多目标光谱仪 FORS2 与 KMOS。本文聚焦于以 KMOS 光谱仪在 H 与 K 波段观测的高红移星系的高质量光谱红移。在 1.3<=z<=2.5 范围内共测得 424 个高可靠 z，H 波段与 K 波段总成功率分别为 60.7% 与 32.8%。新测定的 z 填补了 55% 高优先级与 35% 低优先级空 SOM 网格单元。我们从光谱确认星系的光谱中以 1."2 半径孔径测得 Hα 流量，并转换为恒星形成率。此外，我们对同一样本进行 SED 拟合分析，以推导恒星质量、E(B-V)、总星等及 SFR。我们将光谱所得结果与 SED 拟合所得结果结合，表明光谱失败源于弱恒星形成星系（z<1.7，即 H 波段）或高红移（z>2）星系的低信噪比（S/N）光谱（K 波段）。
引用
@article{arxiv.2007.02631,
title = {Euclid preparation: VIII. The Complete Calibration of the Colour-Redshift Relation survey: VLT/KMOS observations and data release},
author = {Euclid Collaboration and V. Guglielmo and R. Saglia and F. J. Castander and A. Galametz and S. Paltani and R. Bender and M. Bolzonella and P. Capak and O. Ilbert and D. C. Masters and D. Stern and S. Andreon and N. Auricchio and A. Balaguera-Antolínez and M. Baldi and S. Bardelli and A. Biviano and C. Bodendorf and D. Bonino and E. Bozzo and E. Branchini and S. Brau-Nogue and M. Brescia and C. Burigana and R. A. Cabanac and S. Camera and V. Capobianco and A. Cappi and C. Carbone and J. Carretero and C. S. Carvalho and R. Casas and S. Casas and M. Castellano and G. Castignani and S. Cavuoti and A. Cimatti and R. Cledassou and C. Colodro-Conde and G. Congedo and C. J. Conselice and L. Conversi and Y. Copin and L. Corcione and A. Costille and J. Coupon and H. M. Courtois and M. Cropper and A. Da Silva and S. de la Torre and D. Di Ferdinando and F. Dubath and C. A. J. Duncan and X. Dupac and S. Dusini and M. Fabricius and S. Farrens and P. G. Ferreira and S. Fotopoulou and M. Frailis and E. Franceschi and M. Fumana and S. Galeotta and B. Garilli and B. Gillis and C. Giocoli and G. Gozaliasl and J. Graciá-Carpio and F. Grupp and L. Guzzo and H. Hildebrandt and H. Hoekstra and F. Hormuth and H. Israel and K. Jahnke and E. Keihanen and S. Kermiche and M. Kilbinger and C. C. Kirkpatrick and T. Kitching and B. Kubik and M. Kunz and H. Kurki-Suonio and R. Laureijs and S. Ligori and P. B. Lilje and I. Lloro and D. Maino and E. Maiorano and C. Maraston and O. Marggraf and N. Martinet and F. Marulli and R. Massey and S. Maurogordato and E. Medinaceli and S. Mei and M. Meneghetti and R. Benton Metcalf and G. Meylan and M. Moresco and L. Moscardini and E. Munari and R. Nakajima and C. Neissner and S. Niemi and A. A. Nucita and C. Padilla and F. Pasian and L. Patrizii and A. Pocino and M. Poncet and L. Pozzetti and F. Raison and A. Renzi and J. Rhodes and G. Riccio and E. Romelli and M. Roncarelli and E. Rossetti and A. G. Sanchez and D. Sapone and P. Schneider and V. Scottez and A. Secroun and S. Serrano and C. Sirignano and G. Sirri and F. Sureau and P. Tallada-Crespi and D. Tavagnacco and A. N. Taylor and M. Tenti and I. Tereno and R. Toledo-Moreo and F. Torradeflot and A. Tramacere and L. Valenziano and T. Vassallo and Y. Wang and N. Welikala and M. Wetzstein and L. Whittaker and A. Zacchei and G. Zamorani and J. Zoubian and E. Zucca},
journal= {arXiv preprint arXiv:2007.02631},
year = {2021}
}
备注
21 pages, 12 figures