ALMA 中心分子区探索调查 (ACES) 第二部分：3 mm 连续光图像
星系天体物理
2026-02-25 v1
摘要
ALMA 中心分子区探索调查 (ACES) 已对银河系中心约 1000 平方弧分钟区域进行 3 mm 波段的高分辨率 () 成像。ACES 首次提供了银河系中心约 200 太阳亿秒范围内的大尺度、高分辨率视图。本文描述了连续光数据处理流程并呈现了连续光数据产品。在由 45 个单独 ALMA 马赛克拼接而成的综合马赛克中，达到的平均 RMS 噪声为 毫焦/每 束,但在 Sgr A* 及 Sgr B2 附近亮连续光结构区域,噪声显著升高。对于少数最亮且最紧凑的源,可测量带内光谱指数,从而区分由尘埃主导、自由电子或同步辐射主导的源。为恢复大角尺度发射,本文提出了 GBT MUSTANG-2 三毫米扩展核调查 (TENS),这是一项分辨率为 10" 的 CMZ 区域调查,我们将其与 ACES 图像通过羽化 (feathering) 方法进行拼接。为验证 ACES 数据的质量与可靠性,我们将其与以更高分辨率和灵敏度获得的已发表 ALMA 数据进行比较,结果显示整体上与过往结果良好一致,但在最亮源附近存在一些分歧。
引用
@article{arxiv.2602.20240,
title = {ALMA Central Molecular Zone Exploration Survey (ACES) II: 3mm continuum images},
author = {Adam Ginsburg and Daniel L. Walker and Ashley T. Barnes and Xing Lu and Álvaro Sánchez-Monge and Jaime E. Pineda and Marc W. Pound and Pei-Ying Hsieh and Katharina Immer and Qizhou Zhang and Nazar Budaiev and Savannah R. Gramze and Desmond Jeff and Claire Cook and Alyssa Bulatek and Elisabeth A. C. Mills and John Bally and Laura Colzi and Pablo García and Jonathan D. Henshaw and Izaskun Jiménez-Serra and Ralf S. Klessen and Simon R. Dicker and Steven N. Longmore and Francisco Nogueras-Lara and Víctor M. Rivilla and Miriam G. Santa-Maria and Q. Daniel Wang and Fengwei Xu and Cara Battersby and Paul T. P. Ho and J. M. Diederik Kruijssen and Maya Petkova and Mattia C. Sormani and Robin G. Tress and Jennifer Wallace and J. Armijos-Abendaño and Lucia Armillotta and N. Bijas and Rojita Buddhacharya and Laura A. Busch and Natalie O. Butterfield and Mélanie Chevance and Samuel Crowe and Ana Karla Díaz-Rodríguez and Katarzyna M. Dutkowska and Rubén Fedriani and Christoph Federrath and Simon C. O. Glover and Qi-Lao Gu and Rebecca J. Houghton and Yue Hu and Namitha Issac and Janik Karoly and Mark R. Krumholz and Fu-Heng Liang and Sergio Martín and Farideh Mazoochi and Xing Pan and Dylan Paré and Thushara G. S. Pillai and Denise Riquelme-Vásquez and Anika Schmiedeke and Yoshiaki Sofue and Volker Tolls and Gwenllian M. Williams and Suinan Zhang and Emily Moravec and Charles E. Romero and Brian S. Mason and John Orlowski-Scherer and H Perry Hatchfield},
journal= {arXiv preprint arXiv:2602.20240},
year = {2026}
}
备注
Accepted to MNRAS. Website is https://sites.google.com/view/aces-cmz/home and data release is linked from there. Pipeline code is at https://github.com/ACES-CMZ/reduction_ACES/releases/tag/2026-02-18