PHANGS-ALMA：邻近恒星形成星系的弧秒级 CO(2-1) 成像
摘要
我们呈现 PHANGS-ALMA，这是首个以约 1"（约 100 pc）空间分辨率对 90 个邻近（d<~20 Mpc）且位于或接近 z=0 恒星形成星系“主序带”上的代表性星系样本进行 CO J=2-1 谱线辐射制图巡天的项目。CO 谱线辐射示踪分子气体的整体分布，分子气体是星际介质中寒冷的、正在形成恒星的相。在 PHANGS-ALMA 达到的分辨率下，每个束斑达到一个典型孤立巨分子云（GMC）的大小，因此这些数据可用于测量 z=0 处大多数恒星形成的星系群体中分子云的数量统计、生命周期和物理状态。本文描述了该巡天的科学动机和背景、样本选择、目标的总体性质、ALMA 观测，以及所交付 ALMA 数据和衍生数据产品的特征。由于 ALMA 样本作为 VLT/MUSE、HST、AstroSat、VLA 及其他设施并行巡天的父样本，我们包含了关于样本选择的详细讨论。我们详述了星系质量、大小、恒星形成率、CO 光度及其他性质的估计，比较了使用不同系统的估计并提供了每个目标的最佳估计积分测量值。我们还报告了 ALMA 观测的设计与执行，其结合了第 5 周期大型计划、一系列较小计划以及档案观测。最后，我们呈现了首个邻近星系 CO 辐射的 1" 分辨率图集，并描述了首次 PHANGS-ALMA 公开数据发布的性质和内容包括。
引用
@article{arxiv.2104.07739,
title = {PHANGS-ALMA: Arcsecond CO(2-1) Imaging of Nearby Star-Forming Galaxies},
author = {Adam K. Leroy and Eva Schinnerer and Annie Hughes and Erik Rosolowsky and Jérôme Pety and Andreas Schruba and Antonio Usero and Guillermo A. Blanc and Mélanie Chevance and Eric Emsellem and Christopher M. Faesi and Cinthya N. Herrera and Daizhong Liu and Sharon E. Meidt and Miguel Querejeta and Toshiki Saito and Karin M. Sandstrom and Jiayi Sun and Thomas G. Williams and Gagandeep S. Anand and Ashley T. Barnes and Erica A. Behrens and Francesco Belfiore and Samantha M. Benincasa and Ivana Bešlić and Frank Bigiel and Alberto D. Bolatto and Jakob S. den Brok and Yixian Cao and Rupali Chandar and Jérémy Chastenet and I-Da Chiang and Enrico Congiu and Daniel A. Dale and Sinan Deger and Cosima Eibensteiner and Oleg V. Egorov and Axel García-Rodríguez and Simon C. O. Glover and Kathryn Grasha and Jonathan D. Henshaw and I-Ting Ho and Amanda A. Kepley and Jaeyeon Kim and Ralf S. Klessen and Kathryn Kreckel and Eric W. Koch and J. M. Diederik Kruijssen and Kirsten L. Larson and Janice C. Lee and Laura A. Lopez and Josh Machado and Ness Mayker and Rebecca McElroy and Eric J. Murphy and Eve C. Ostriker and Hsi-An Pan and Ismael Pessa and Johannes Puschnig and Alessandro Razza and Patricia Sánchez-Blázquez and Francesco Santoro and Amy Sardone and Fabian Scheuermann and Kazimierz Sliwa and Mattia C. Sormani and Sophia K. Stuber and David A. Thilker and Jordan A. Turner and Dyas Utomo and Elizabeth J. Watkins and Bradley Whitmore},
journal= {arXiv preprint arXiv:2104.07739},
year = {2021}
}
备注
76 pages, 33 figures. Accepted for publication in the Astrophysical Journal Supplement series. Full resolution version and the image atlas to appear as a figure set in the published version can be found https://sites.google.com/view/phangs/publications . Data release coming soon to the ALMA archive and CADC temporarily available at http://phangs.org/data