HerMES: 基于SPIRE科学验证阶段观测的P(D)涨落分析得出的深场星系计数
宇宙学与河外天体物理
2015-05-20 v1
摘要
尘埃恒星形成星系对明亮但尚未分辨的宇宙远红外背景有贡献。旨在探测和表征构成该背景的星系的深场Herschel-SPIRE图像高度混淆,使得大部分源位于经典混淆极限以下。我们分析了HerMES计划中三个SPIRE波段(250、350和500微米)的三个天区;使用P(D)(偏转概率)方法,将参数化的星系计数模型推导至约2 mJy/波束的深度,约为这些波长上先前分析深度的4倍,以便与理论计数模型进行比较。我们的拟合分别解释了三个波段中远红外背景的64%、60%和43%。这些计数与基于单个探测到的SPIRE源的计数一致,但与大多数星系计数模型普遍不一致,这些模型通常高估了亮星系的数量,并且不如P(D)推导的计数陡峭。在低流量密度处发现了微分计数斜率断裂的明确证据。探讨了P(D)分析中的系统效应。我们发现成团效应对数据的影响较小,最大的已识别系统误差来自SPIRE波束的不确定性。
引用
@article{arxiv.1009.5675,
title = {HerMES: Deep Galaxy Number Counts from a P(D) Fluctuation Analysis of SPIRE Science Demonstration Phase Observations},
author = {J. Glenn and A. Conley and M. Bethermin and B. Altieri and A. Amblard and V. Arumugam and H. Aussel and T. Babbedge and A. Blain and J. Bock and A. Boselli and V. Buat and N. Castro-Rodriguez and A. Cava and P. Chanial and D. L. Clements and L. Conversi and A. Cooray and C. D. Dowell and E. Dwek and S. Eales and D. Elbaz and T. P. Ellsworth-Bowers and M. Fox and A. Franceschini and W. Gear and M. Griffin and M. Halpern and E. Hatziminaoglou and E. Ibar and K. Isaak and R. J. Ivison and G. Lagache and G. Laurent and L. Levenson and N. Lu and S. Madden and B. Maffei and G. Mainetti and L. Marchetti and G. Marsden and H. T. Nguyen and B. O'Halloran and S. J. Oliver and A. Omont and M. J. Page and P. Panuzzo and A. Papageorgiou and C. P. Pearson and I. Perez-Fournon and M. Pohlen and D. Rigopoulou and D. Rizzo and I. G. Roseboom and M. Rowan-Robinson and M. Sanchez Portal and B. Schulz and Douglas Scott and N. Seymour and D. L. Shupe and A. J. Smith and J. A. Stevens and M. Symeonidis and M. Trichas and K. E. Tugwell and M. Vaccari and I. Valtchanov and J. D. Vieira and L. Vigroux and L. Wang and R. Ward and G. Wright and C. K. Xu and M. Zemcov},
journal= {arXiv preprint arXiv:1009.5675},
year = {2015}
}
备注
Accepted for publication in MNRAS