欧几里得准备：V. 宽视场巡天对红移 7<z<9 类星星的预期产额
星系天体物理
2019-11-06 v2 宇宙学与河外天体物理
摘要
我们给出了 Euclid 宽视场巡天对 7<z<9 类星体的预期产额，并在多方面更新了 Euclid 红皮书中的计算。我们考虑了 Euclid 近红外滤光片波长的修订；我们采用了更陡的类星体光度函数(QLF; Φ)随红移的下降速率，Φ∝10^{k(z-6)}，k=-0.72，以及更陡的下降速率 k=-0.92；我们使用了更好的污染群体模型（MLT 矮星与致密早型星系）；并且相较于红皮书计算所用的颜色截断，我们使用了改进的贝叶斯选择方法，可识别更暗的类星体，低至 J_{AB}∼23。z>8 的类星体可仅由 Euclid OYJH 测光选出，但 7<z<8 红移区间的选择因加入来自 Pan-STARRS 和 LSST 等的 z 波段数据而大为改善。我们对所假设的 z=6 之外 QLF 下降速率值计算了预期类星体产额。对于 QLF 在 z=6 之后加速下降、k=-0.92 的情形，Euclid 仍应发现超过 100 个 7.0<z<7.5 的类星体，以及约 25 个超越当前 z=7.5 纪录的类星体，包括约 8 个超越 z=8.0 的。首批 z>7.5 的 Euclid 类星体应在预计于 2024 年发布的 DR1 数据发布中找到。利用 8 米级望远镜确认候选体，将可能确定 QLF 的亮端斜率（7<z<8，M_{1450}<-25），但需借助 JWST 或 E-ELT 的后续观测来测量暗端斜率。即便在 J_{AB}∼23，候选列表的污染也预计不大。在 7<z<8 上 k 的确定精度取决于 k 值，但假设 k=-0.72 时可测到 0.07 的 1 西格玛不确定度。
引用
@article{arxiv.1908.04310,
title = {Euclid preparation: V. Predicted yield of redshift 7<z<9 quasars from the wide survey},
author = {Euclid Collaboration and R. Barnett and S. J. Warren and D. J. Mortlock and J. -G. Cuby and C. Conselice and P. C. Hewett and C. J. Willott and N. Auricchio and A. Balaguera-Antolínez and M. Baldi and S. Bardelli and F. Bellagamba and R. Bender and A. Biviano and D. Bonino and E. Bozzo and E. Branchini and M. Brescia and J. Brinchmann and C. Burigana and S. Camera and V. Capobianco and C. Carbone and J. Carretero and C. S. Carvalho and F. J. Castander and M. Castellano and S. Cavuoti and A. Cimatti and R. Clédassou and G. Congedo and L. Conversi and Y. Copin and L. Corcione and J. Coupon and H. M. Courtois and M. Cropper and A. Da Silva and C. A. J. Duncan and S. Dusini and A. Ealet and S. Farrens and P. Fosalba and S. Fotopoulou and N. Fourmanoit and M. Frailis and M. Fumana and S. Galeotta and B. Garilli and W. Gillard and B. R. Gillis and J. Graciá-Carpio and F. Grupp and H. Hoekstra and F. Hormuth and H. Israel and K. Jahnke and S. Kermiche and M. Kilbinger and C. C. Kirkpatrick and T. Kitching and R. Kohley and B. Kubik and M. Kunz and H. Kurki-Suonio and R. Laureijs and S. Ligori and P. B. Lilje and I. Lloro and E. Maiorano and O. Mansutti and O. Marggraf and N. Martinet and F. Marulli and R. Massey and N. Mauri and E. Medinaceli and S. Mei and Y. Mellier and R. B. Metcalf and J. J. Metge and G. Meylan and M. Moresco and L. Moscardini and E. Munari and C. Neissner and S. M. Niemi and T. Nutma and C. Padilla and S. Paltani and F. Pasian and P. Paykari and W. J. Percival and V. Pettorino and G. Polenta and M. Poncet and L. Pozzetti and F. Raison and A. Renzi and J. Rhodes and H. -W. Rix and E. Romelli and M. Roncarelli and E. Rossetti and R. Saglia and D. Sapone and R. Scaramella and P. Schneider and V. Scottez and A. Secroun and S. Serrano and G. Sirri and L. Stanco and F. Sureau and P. Tallada-Crespí and D. Tavagnacco and A. N. Taylor and M. Tenti and I. Tereno and R. Toledo-Moreo and F. Torradeflot and L. Valenziano and T. Vassallo and Y. Wang and A. Zacchei and G. Zamorani and J. Zoubian and E. Zucca},
journal= {arXiv preprint arXiv:1908.04310},
year = {2019}
}
备注
Published in A&A. Updated to match accepted version