欧几里得快速数据发布（Q1）：在欧几里得深场中搜寻高红移（z > 6）明亮星系——预测与首次明亮探测
星系天体物理
2025-11-25 v2
摘要
静止系紫外光度函数（UV LF）的演化是早期恒星形成和恒星质量积累的有力探针。在z > 6处，其亮端（MUV < -21）由于现有天基近红外（NIR）巡天体积小，仍然约束不足。欧几里得深场（EDFs）将以26.5 AB的深度覆盖53平方度的NIR成像，面积比之前的天基巡天增加100倍。因此，它们为选择明亮的z > 6莱曼断裂星系（LBGs）并约束UV LF的亮端提供了前所未有的机会。凭借延伸至2微米的NIR覆盖，欧几里得可以探测到红移z = 13的星系。我们给出了在最终EDF数据集中预期发现的z > 6星系数密度的预测。利用来自z = 5-15星系、z = 1-4干扰源和银河系MLT矮星的能谱分布（SED）模板的合成测光，我们探索了高红移LBGs的最优选择方法。将信噪比（S/N）截断与SED拟合（从光学到中红外）相结合，能产生最高保真度的样本，恢复超过76%的输入z > 6 LBGs，同时将低红移污染控制在10%以下。这排除了仪器伪影，后者将影响早期的欧几里得数据发布。辅助数据至关重要：来自超新星主焦点相机和维拉·C·鲁宾天文台的光学成像能区分真实的莱曼断裂，而斯皮策/IRAC数据有助于恢复z > 10的源。基于经验的双幂律（DPL）LF模型，我们预计在最终的欧几里得数据发布中，在z = 6-12处将发现超过100,000个LBGs，在z > 12处将发现超过100个。相比之下，更陡峭的谢克特模型预测在z > 12处没有探测。我们还展示了来自EDF-N Q1数据集的两个超亮（MUV < -23.5）候选体。如果它们的红移得到确认，其星等支持z > 9处的DPL LF模型，突显了欧几里得在约束UV LF亮端以及为后续观测识别最明亮早期星系方面的能力。
引用
@article{arxiv.2511.02926,
title = {Euclid Quick Data Release (Q1): Hunting for luminous z > 6 galaxies in the Euclid Deep Fields -- forecasts and first bright detections},
author = {Euclid Collaboration and N. Allen and P. A. Oesch and R. A. A. Bowler and S. Toft and J. Matharu and J. R. Weaver and C. J. R. McPartland and M. Shuntov and D. B. Sanders and B. Mobasher and H. J. McCracken and H. Atek and E. Bañados and S. W. J. Barrow and S. Belladitta and D. Carollo and M. Castellano and C. J. Conselice and P. R. M. Eisenhardt and Y. Harikane and G. Murphree and M. Stefanon and S. M. Wilkins and A. Amara and S. Andreon and N. Auricchio and C. Baccigalupi and M. Baldi and A. Balestra and S. Bardelli and P. Battaglia and R. Bender and A. Biviano and E. Branchini and M. Brescia and J. Brinchmann and S. Camera and G. Cañas-Herrera and V. Capobianco and C. Carbone and J. Carretero and G. Castignani and S. Cavuoti and K. C. Chambers and A. Cimatti and C. Colodro-Conde and G. Congedo and L. Conversi and Y. Copin and F. Courbin and H. M. Courtois and M. Cropper and A. Da Silva and H. Degaudenzi and G. De Lucia and H. Dole and F. Dubath and C. A. J. Duncan and X. Dupac and S. Dusini and S. Escoffier and M. Farina and R. Farinelli and F. Faustini and S. Ferriol and F. Finelli and N. Fourmanoit and M. Frailis and E. Franceschi and M. Fumana and S. Galeotta and K. George and B. Gillis and C. Giocoli and J. Gracia-Carpio and A. Grazian and F. Grupp and S. V. H. Haugan and H. Hoekstra and W. Holmes and I. M. Hook and F. Hormuth and A. Hornstrup and K. Jahnke and M. Jhabvala and B. Joachimi and E. Keihänen and S. Kermiche and A. Kiessling and B. Kubik and K. Kuijken and M. Kümmel and M. Kunz and H. Kurki-Suonio and A. M. C. Le Brun and D. Le Mignant and S. Ligori and P. B. Lilje and V. Lindholm and I. Lloro and G. Mainetti and D. Maino and E. Maiorano and O. Mansutti and O. Marggraf and M. Martinelli and N. Martinet and F. Marulli and R. J. Massey and E. Medinaceli and S. Mei and Y. Mellier and M. Meneghetti and E. Merlin and G. Meylan and A. Mora and M. Moresco and L. Moscardini and R. Nakajima and C. Neissner and S. -M. Niemi and C. Padilla and S. Paltani and F. Pasian and K. Pedersen and W. J. Percival and V. Pettorino and S. Pires and G. Polenta and M. Poncet and L. A. Popa and L. Pozzetti and F. Raison and A. Renzi and J. Rhodes and G. Riccio and E. Romelli and M. Roncarelli and R. Saglia and Z. Sakr and D. Sapone and B. Sartoris and M. Schirmer and P. Schneider and T. Schrabback and A. Secroun and E. Sefusatti and G. Seidel and S. Serrano and P. Simon and C. Sirignano and G. Sirri and L. Stanco and J. Steinwagner and P. Tallada-Crespí and A. N. Taylor and H. I. Teplitz and I. Tereno and N. Tessore and R. Toledo-Moreo and F. Torradeflot and I. Tutusaus and L. Valenziano and J. Valiviita and T. Vassallo and Y. Wang and J. Weller and G. Zamorani and F. M. Zerbi and E. Zucca and V. Allevato and M. Ballardini and M. Bolzonella and E. Bozzo and C. Burigana and R. Cabanac and M. Calabrese and A. Cappi and D. Di Ferdinando and J. A. Escartin Vigo and L. Gabarra and W. G. Hartley and R. Maoli and J. Martín-Fleitas and S. Matthew and M. Maturi and N. Mauri and R. B. Metcalf and A. Pezzotta and M. Pöntinen and C. Porciani and I. Risso and V. Scottez and M. Sereno and M. Tenti and M. Viel and M. Wiesmann and Y. Akrami and I. T. Andika and S. Anselmi and M. Archidiacono and F. Atrio-Barandela and D. Bertacca and M. Bethermin and A. Blanchard and L. Blot and M. Bonici and M. L. Brown and S. Bruton and A. Calabro and B. Camacho Quevedo and F. Caro and C. S. Carvalho and T. Castro and F. Cogato and S. Conseil and T. Contini and A. R. Cooray and O. Cucciati and G. Desprez and A. Díaz-Sánchez and J. J. Diaz and S. Di Domizio and J. M. Diego and M. Y. Elkhashab and A. Enia and Y. Fang and A. G. Ferrari and A. Finoguenov and A. Fontana and F. Fontanot and A. Franco and K. Ganga and J. García-Bellido and T. Gasparetto and V. Gautard and E. Gaztanaga and F. Giacomini and F. Gianotti and G. Gozaliasl and M. Guidi and C. M. Gutierrez and A. Hall and S. Hemmati and C. Hernández-Monteagudo and H. Hildebrandt and J. Hjorth and J. J. E. Kajava and Y. Kang and V. Kansal and D. Karagiannis and K. Kiiveri and J. Kim and C. C. Kirkpatrick and S. Kruk and L. Legrand and M. Lembo and F. Lepori and G. Leroy and G. F. Lesci and J. Lesgourgues and T. I. Liaudat and S. J. Liu and X. Lopez Lopez and J. Macias-Perez and M. Magliocchetti and F. Mannucci and C. J. A. P. Martins and L. Maurin and M. Miluzio and P. Monaco and C. Moretti and G. Morgante and K. Naidoo and A. Navarro-Alsina and S. Nesseris and D. Paoletti and F. Passalacqua and K. Paterson and L. Patrizii and R. Pello and A. Pisani and D. Potter and S. Quai and M. Radovich and P. -F. Rocci and G. Rodighiero and S. Sacquegna and M. Sahlén and E. Sarpa and A. Schneider and M. Schultheis and D. Sciotti and E. Sellentin and F. Shankar and L. C. Smith and J. G. Sorce and K. Tanidis and C. Tao and G. Testera and R. Teyssier and S. Tosi and A. Troja and M. Tucci and C. Valieri and A. Venhola and D. Vergani and G. Verza and P. Vielzeuf and N. A. Walton and D. Scott},
journal= {arXiv preprint arXiv:2511.02926},
year = {2025}
}