AI 中文总结
本研究利用野边山45米望远镜获取银心分子区的大尺度分子线数据，公开经SCIMES算法识别的SiO发射云表，发现SiO线比与n_H2 t_dyn存在强负相关，为相关研究提供基础数据。
AI 中文摘要
我们发布了利用野边山射电天文台45米望远镜获取的银河系中心分子区（CMZ）的大尺度分子线图。观测覆盖3.5度×0.5度的天区，分辨率为20角秒，涉及8条分子线，包括SiO J=2-1、CS J=2-1、H13CN J=1-0和HCN J=1-0。我们公开了校准后的数立方体以及通过SCIMES算法识别的SiO发射云表。针对每个云，我们提供了观测谱线的云积分强度，并推导了基于H13CN的分子气体质量以及云平均H2数密度。我们将SiO强度比与密度、动力学时标及其乘积n_H2 t_dyn进行比较，发现SiO相对于其他6条分子线的强度比均随n_H2 t_dyn的增加呈系统性下降，其中SiO/H13CN（斯皮尔曼相关系数r_s=-0.82）和SiO/CS（r_s=-0.70）的相关性最为紧密。公开的数立方体和云表可用于对CMZ的SiO增强、激波化学和气体动力学演化开展系统性研究。
英文摘要
We present large-scale molecular line maps of the Central Molecular Zone (CMZ) in our Galaxy obtained with the Nobeyama Radio Observatory 45 m telescope. The observations cover a 3.5 deg x 0.5 deg region with 20 arcsec resolution in eight molecular lines including SiO J=2-1, CS J=2-1, H13CN J=1-0, and HCN J=1-0. We release the calibrated data cubes and a catalog of SiO-emitting clouds identified by the SCIMES algorithm. For each cloud, we provide cloud-integrated intensities of the observed lines and derive an H13CN-based molecular gas mass and a cloud-averaged H2 number density. We compare SiO intensity ratios with the density, dynamical time, and their product n_H2 t_dyn. We find that SiO intensity ratios relative to six other molecular lines all decrease systematically with increasing n_H2 t_dyn. The tightest correlations are found for SiO/H13CN (r_s = -0.82) and SiO/CS (r_s = -0.70). The released data cubes and cloud catalog enable systematic studies of SiO enhancement, shock chemistry, and gas dynamical evolution across the CMZ.
CommentsAccepted for publication in ApJS. 36 pages, 27 figures, 4 tables. Calibrated FITS data products are available at doi:10.5281/zenodo.19588616
