期刊論文
| 學年 | 110 |
|---|---|
| 學期 | 1 |
| 出版（發表）日期 | 2021-09-06 |
| 作品名稱 | Frequency and nature of central molecular outflows in nearby star-forming disk galaxies |
| 作品名稱（其他語言） | |
| 著者 | Sophia K. Stuber; Toshiki Saito; Eva Schinnerer; Eric Emsellem; Miguel Querejeta; Thomas G. Williams; Ashley T. Barnes; Frank Bigiel; Guillermo Blanc; Daniel A. Dale; Kathryn Grasha; Ralf Klessen; J. M. Diederik Kruijssen; Adam K. Leroy; Sharon Meidt; Hsi-An Pan; Erik Rosolowsky; Andreas Schruba; Jiayi Sun; Antonio Usero |
| 單位 | |
| 出版者 | |
| 著錄名稱、卷期、頁數 | Astronomy & Astrophysics 653, A172 (27 pages) |
| 摘要 | Central molecular outflows in spiral galaxies are assumed to modulate their host galaxy's star formation rate by removing gas from the inner region of the galaxy. Outflows consisting of different gas phases appear to be a common feature in local galaxies, yet, little is known about the frequency of molecular outflows in main sequence galaxies in the nearby universe. We develop a rigorous set of selection criteria, which allow the reliable identification of outflows in large samples of galaxies. Our criteria make use of central spectra, position-velocity diagrams and velocity-integrated intensity maps (line-wing maps). We use this method on high-angular resolution CO(2-1) observations from the PHANGS-ALMA survey, which provides observations of the molecular gas for a homogeneous sample of 90 nearby main sequence galaxies at a resolution of ∼100pc. We find correlations between the assigned outflow confidence and stellar mass or global star formation rate (SFR). We determine the frequency of central molecular outflows to be 25±2% considering all outflow candidates, or 20±2% for secure outflows only. Our resulting outflow candidate sample of 16−20 galaxies shows an overall enhanced fraction of active galactic nuclei (AGN) (50%) and bars (89%) compared to the full sample (galaxies with AGN: 24%, with bar: 61%). We extend the trend between mass outflow rates and SFR known for high outflow rates down to lower values (log10M˙out[M⊙ yr−1]<0). Mass loading factors are of order unity, indicating that these outflows are not efficient in quenching the SFR in main sequence galaxies. |
| 關鍵字 | ISM: jets & outflows;ISM: kinematics & dynamics;molecular data;galaxies: statistics; galaxies: ISM |
| 語言 | en_US |
| 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 | FRA |
| 公開徵稿 | |
| 出版型式 | ,電子版,紙本 |
| 相關連結 |
機構典藏連結 ( http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/122466 ) |