تقرير
The Baryonic Content of Galaxies Mapped by MaNGA and the Gas Around Them
| العنوان: | The Baryonic Content of Galaxies Mapped by MaNGA and the Gas Around Them |
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| المؤلفون: | Klimenko, Viacheslav V., Kulkarni, Varsha, Wake, David A., Poudel, Suraj, Bershady, Matthew A., Peroux, Celine, Lundgren, Britt |
| سنة النشر: | 2023 |
| المجموعة: | Astrophysics |
| مصطلحات موضوعية: | Astrophysics - Astrophysics of Galaxies |
| الوصف: | We analyze the cool gas in and around 14 nearby galaxies (at $z$$<$0.1) mapped with the SDSS-IV MaNGA survey by measuring absorption lines produced by gas in spectra of background quasars/AGN at impact parameters of 0-25 effective radii from the galaxy center. Using HST/COS, we detect absorption at the galaxy redshift and measure or constrain column densities of neutral (H I, N I, O I, Ar I), low-ionization (Si II, S II, C II, N II Fe II), and high-ionization (Si III, Fe III, N V, O VI) species for 11 galaxies. We derive the ionization parameter and ionization-corrected metallicity using CLOUDY photo-ionization models. The H I column density ranges from $\sim$$10^{13}$ to $\sim$$10^{20}\,{\rm cm^{-2}}$ and decreases with impact parameter for $r \ge R_{e}$. 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 co-rotates with the disk out to $\sim$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, super-solar metallicity, and velocities consistent with the direction of galactic outflow. Our data offer the first detailed comparisons of 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. Comment: Accepted for publication in ApJ, 49 pages, 36 figures |
| نوع الوثيقة: | Working Paper |
| URL الوصول: | http://arxiv.org/abs/2308.10992 |
| رقم الأكسشن: | edsarx.2308.10992 |
| قاعدة البيانات: | arXiv |
| الوصف غير متاح. |