CMZoom. II. Catalog of Compact Submillimeter Dust Continuum Sources in the Milky Way’s Central Molecular Zone
CMZoom. II. Catalog of Compact Submillimeter Dust Continuum Sources in the Milky Way’s Central Molecular Zone
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DOI：
10.3847/1538-4365/abb610
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发表时间：
2020-09
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通讯作者：
H. P. Hatchfield;C. Battersby;E. Keto;D. Walker;A. Barnes;D. Callanan;A. Ginsburg;J. Henshaw;J. Kauffmann;J. Kruijssen;S. Longmore;Xing Lu;E. Mills;T. Pillai;Qizhou Zhang;J. Bally;N. Butterfield;Y. Contreras;L. Ho;J. Ott;N. Patel;V. Tolls
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作者：
H. P. Hatchfield;C. Battersby;E. Keto;D. Walker;A. Barnes;D. Callanan;A. Ginsburg;J. Henshaw;J. Kauffmann;J. Kruijssen;S. Longmore;Xing Lu;E. Mills;T. Pillai;Qizhou Zhang;J. Bally;N. Butterfield;Y. Contreras;L. Ho;J. Ott;N. Patel;V. Tolls
本文介绍了CMZoom巡天的中心分子带（CMZ）致密源（<10″，≤ 0.4pc）目录。CMZoom是一个亚毫米阵列大型程序，旨在提供1.3 mm尘埃连续统中银河系最内部500 pc的所有高柱密度气体（N（H2）≥ 1023 cm-2）的完整且无偏差的地图。我们生成一个强大的目录，旨在减少虚假源检测，和第二个目录具有更高的完整性，都使用修剪树状图生成。在鲁棒目录中，我们报告了285个紧凑源，或816个高完整性目录。这些源的有效半径在0.04到0.4秒差距之间，是星星团的潜在祖先。这两个星表的质量都是由人马座B2云复合体主导的，那里的质量可能是不可靠的，因为自由的污染，不确定的尘埃温度和视线混乱。考虑到调查的选择和完整性，我们预测我们强大的目录占CMZ中能够形成高质量恒星的紧凑子结构的99%以上。该星表为今后研究银河系中心大质量星星的形成提供了重要的基础。
In this paper we present the CMZoom survey’s catalog of compact sources (<10″, ∼0.4 pc) within the central molecular zone (CMZ). CMZoom is a Submillimeter Array large program designed to provide a complete and unbiased map of all high column density gas (N(H2) ≥ 1023 cm−2) of the innermost 500 pc of the Galaxy in the 1.3 mm dust continuum. We generate both a robust catalog designed to reduce spurious source detections, and a second catalog with higher completeness, both generated using a pruned dendrogram. In the robust catalog, we report 285 compact sources, or 816 in the high-completeness catalog. These sources have effective radii between 0.04 and 0.4 pc, and are the potential progenitors of star clusters. The masses for both catalogs are dominated by the Sagittarius B2 cloud complex, where masses are likely unreliable due to free–free contamination, uncertain dust temperatures, and line-of-sight confusion. Given the survey selection and completeness, we predict that our robust catalog accounts for more than ∼99% of compact substructure capable of forming high-mass stars in the CMZ. This catalog provides a crucial foundation for future studies of high-mass star formation in the Galactic Center.