欧几里得：快速数据发布（Q1）——基于光谱搜索欧几里得深场中超低温矮星
太阳与恒星天体物理
2025-12-10 v2 地球与行星天体物理
星系天体物理
天体物理仪器与方法
摘要
我们报告了在欧几里得深场 Q1 数据发布中发现的 5306 项新型超低温矮星 (UCD) 候选对象。这些对象涵盖晚型 M 星至晚型 T 矮星，包括 1200 颗 L 与 T 矮星。其中 546 项对象已通过光谱确认，包括 329 颗 L 型矮星和 26 颗 T 型矮星。我们还提供了欧几里得颜色随谱类型变化的经验公式。UCD 的筛选标准仅基于颜色 ()。对光学探测和严格信噪比阈值的综合要求确保了样本的高纯度，但以牺牲完整性为代价，尤其是对 T 型矮星。检测范围覆盖近红外波段的 19 至 24 星等，以及光学波段的 26 星等。我们讨论了欧几里得基于其光谱波段识别 UCD 候选对象的能力。检测到的 UCD 在天空上的平均面密度约为每平方度约 100 个对象，其中约 20 个是 L 与 T 型矮星。这一结果表明，在本工作中使用的严格筛选标准下，欧几里得宽幅调查的最终数据发布预计将包含至少 140 万颗超低温矮星，其中至少 30 万颗是 L 型矮星，超过 2600 颗是 T 型矮星。
引用
@article{arxiv.2503.22497,
title = {Euclid: Quick Data Release (Q1) -- A photometric search for ultracool dwarfs in the Euclid Deep Fields},
author = {M. Žerjal and C. Dominguez-Tagle and N. Vitas and N. Sedighi and E. L. Martín and M. R. Zapatero Osorio and J. Olivares and S. Muñoz Torres and S. Tsilia and J. -Y. Zhang and D. Barrado and V. J. S. Béjar and H. Bouy and A. Burgasser and P. Cruz and N. Lodieu and P. Mas Buitrago and N. Phan-Bao and E. Solano and R. Tata and B. Goldman and A. Mohandasan and C. Reylé and R. L. Smart and N. Aghanim and B. Altieri 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 A. Biviano and A. Bonchi 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 S. Casas and M. Castellano and G. Castignani and S. Cavuoti and K. C. Chambers and A. Cimatti and C. Colodro-Conde and G. Congedo and C. J. Conselice and L. Conversi and Y. Copin and F. Courbin and H. M. Courtois and M. Cropper and J. -G. Cuby and A. Da Silva and H. Degaudenzi and G. De Lucia and C. Dolding and H. Dole and M. Douspis and F. Dubath and X. Dupac and S. Dusini and S. Escoffier and M. Farina and F. Faustini and S. Ferriol and S. Fotopoulou and M. Frailis and E. Franceschi and S. Galeotta and K. George and B. Gillis and C. Giocoli and P. Gómez-Alvarez and J. Gracia-Carpio and B. R. Granett and A. Grazian and F. Grupp and S. V. H. Haugan and J. Hoar and W. Holmes and F. Hormuth and A. Hornstrup and K. Jahnke and M. Jhabvala 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 Q. Le Boulc'h and A. M. C. Le Brun 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. 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 R. Rebolo 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 J. A. Schewtschenko and M. Schirmer and P. Schneider and A. Secroun and G. Seidel and M. Seiffert 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 I. Tereno and S. Toft and R. Toledo-Moreo and F. Torradeflot and A. Tsyganov and I. Tutusaus and L. Valenziano and J. Valiviita and T. Vassallo and G. Verdoes Kleijn and A. Veropalumbo and Y. Wang and J. Weller and A. Zacchei and G. Zamorani and F. M. Zerbi and E. Zucca and J. Martín-Fleitas and V. Scottez},
journal= {arXiv preprint arXiv:2503.22497},
year = {2025}
}
备注
Accepted in A&A. 19 pages, 15 figures, 5 tables