The Baryonic Content of Galaxies Mapped by MaNGA and the Gas Around Them
The Baryonic Content of Galaxies Mapped by MaNGA and the Gas Around Them
复制标题
DOI：
10.3847/1538-4357/ace329
复制
发表时间：
2023-08
期刊：
影响因子：
--
通讯作者：
Viacheslav V. Klimenko;V. Kulkarni;D. A. Wake;Suraj Poudel;M. Bershady;C. Péroux;B. Lundgren
中科院分区：
文献类型：
--
作者：
Viacheslav V. Klimenko;V. Kulkarni;D. A. Wake;Suraj Poudel;M. Bershady;C. Péroux;B. Lundgren
利用Sloan Digital Sky Survey IV的MaNGA巡天数据，分析了14个邻近星系（z < 0.1）中的冷气体，测量了背景类星体/活动星系核在距星系中心0-25有效半径的碰撞参数下的吸收谱线。利用哈勃太空望远镜/宇宙起源摄谱仪，我们探测了11个星系在星系红移处的吸收，并测量或约束了中性（H i，N i，O i和Ar i），低电离（Si ii，S ii，C ii，N ii和Fe ii）和高电离（Si iii，Fe iii，N v和O vi）物种的柱密度。我们推导出电离参数和电离校正的金属丰度使用多云光电离模型。H i柱密度范围为1013 ~ 1020 cm-2，并随r Re的冲击参数而减小。质量越大的星系氢吸收越弱。将星系盘中电离气体线辐射的吸收速度与MaNGA径向速度图进行比较，发现吸收中的中性气体随星系盘共旋到1000 Re。低仰角的视线显示较低的金属丰度，与来自MaNGA地图的磁盘中的金属丰度梯度一致。高仰角的视线显示出较高的电离，较低的H i柱密度，超太阳金属丰度，以及与银河系外流方向一致的速度。我们的数据提供了第一个详细的比较环星系介质（CGM）的属性（运动学和金属丰度）与外推的详细星系地图从积分场光谱;类似的研究需要更大的样本，以更充分地了解星系如何与他们的CGM相互作用。
We analyze the cool gas in and around 14 nearby galaxies (at z < 0.1) mapped with the Sloan Digital Sky Survey IV MaNGA survey by measuring absorption lines produced by gas in spectra of background quasars/active galactic nuclei at impact parameters of 0–25 effective radii from the galactic centers. Using Hubble Space Telescope/Cosmic Origins Spectrograph, we detect absorption at the galactic redshift and measure or constrain column densities of neutral (H i, N i, O i, and Ar i), low-ionization (Si ii, S ii, C ii, N ii, and Fe ii), and high-ionization (Si iii, Fe iii, N v, and O vi) species for 11 galaxies. We derive the ionization parameter and ionization-corrected metallicity using cloudy photoionization models. The H i column density ranges from ∼1013 to ∼1020 cm−2 and decreases with impact parameter for r ≳ R e . Galaxies with higher stellar mass have weaker H i absorption. Comparing absorption velocities with MaNGA radial velocity maps of ionized gas line emissions in galactic disks, we find that the neutral gas seen in absorption corotates with the disk out to ∼10 R e . Sight lines with lower elevation angles show lower metallicities, consistent with the metallicity gradient in the disk derived from MaNGA maps. Higher-elevation angle sight lines show higher ionization, lower H i column density, supersolar metallicity, and velocities consistent with the direction of galactic outflow. Our data offer the first detailed comparisons of circumgalactic medium (CGM) properties (kinematics and metallicity) with extrapolations of detailed galaxy maps from integral field spectroscopy; similar studies for larger samples are needed to more fully understand how galaxies interact with their CGM.