期刊論文
| 學年 | 114 |
|---|---|
| 學期 | 1 |
| 出版（發表）日期 | 2025-09-24 |
| 作品名稱 | Physical Properties of Gas Departing from Circular Rotation at 50 pc Scales Using the PHANGS-MUSE Galaxies |
| 作品名稱（其他語言） | |
| 著者 | Carlos López-Cobá; Lihwai Lin; Irene Cruz Gonzalez; Sebastián F. Sánchez; Hsi-An Pan; J. K. Barrera-Ballesteros; Bau-Ching Hsieh |
| 單位 | |
| 出版者 | |
| 著錄名稱、卷期、頁數 | The Astronomical Journal 170(4) |
| 摘要 | Noncircular (NC) motions have been observed across various spatial scales in disk galaxies, yet the physical properties of the gas involved in these motions remain poorly constrained. Using data from 19 galaxies from the PHANGS-MUSE sample, we investigated the prevalence of NC flows at spatial resolutions of tens of parsecs. We developed a new tool for 3D kinematic modeling of data cubes and applied to the PHANGS-MUSE Hα spectral lines to recover the underlying circular, NC motions, as well as the intrinsic velocity dispersion in these objects. The PHANGS-MUSE galaxies exhibit rotation-supported disks with Vrot/σintrin ratios ≳5. Our analysis revealed ionized gas exhibiting NC motions at different amplitudes, with low velocity amplitudes of about 5 km s−1 associated with the axisymmetric rotation component, deviations of ∼10 km s−1 primarily linked to interarm regions and spiral arms, and larger deviations (>20 km s−1), found in the central and bar regions. We found that the velocity dispersion and the strength of ionization correlate with the amplitude of NC motions, suggesting that the underlying dynamics of the warm gas are closely tied to its physical properties. |
| 關鍵字 | |
| 語言 | en |
| ISSN | |
| 期刊性質 | 國外 |
| 收錄於 | SCI |
| 產學合作 | |
| 通訊作者 | |
| 審稿制度 | 是 |
| 國別 | USA |
| 公開徵稿 | |
| 出版型式 | ,電子版 |
| 相關連結 |
機構典藏連結 ( http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/128548 ) |