淡江大學機構典藏:Item 987654321/122466
English  |  正體中文  |  简体中文  |  全文笔数/总笔数 : 64180/96952 (66%)
造访人次 : 11307190      在线人数 : 8408
RC Version 7.0 © Powered By DSPACE, MIT. Enhanced by NTU Library & TKU Library IR team.
搜寻范围 查询小技巧：
  • 您可在西文检索词汇前后加上"双引号"，以获取较精准的检索结果
  • 若欲以作者姓名搜寻，建议至进阶搜寻限定作者字段，可获得较完整数据
    •  进阶搜寻


    jsp.display-item.identifier=請使用永久網址來引用或連結此文件: https://tkuir.lib.tku.edu.tw/dspace/handle/987654321/122466


    题名: Frequency and nature of central molecular outflows in nearby star-forming disk galaxies
    作者: Stuber, Sophia K.;Saito, Toshiki;Schinnerer, Eva;Emsellem, Eric;Querejeta, Miguel;Williams, Thomas G.;Barnes, Ashley T.;Bigiel, Frank;Blanc, Guillermo;Dale, Daniel A.;Grasha, Kathryn;Klessen, Ralf;Kruijssen, J. M. Diederik;Leroy, Adam K.;Meidt, Sharon;Pan, Hsi-An;Rosolowsky, Erik;Schruba, Andreas;Sun, Jiayi;Usero, Antonio
    关键词: ISM: jets & outflows;ISM: kinematics & dynamics;molecular data;galaxies: statistics;galaxies: ISM
    日期: 2021-09-06
    上传时间: 2022-03-10 12:11:06 (UTC+8)
    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.
    關聯: Astronomy & Astrophysics 653, A172 (27 pages)
    DOI: 10.1051/0004-6361/202141093
    显示于类别:[物理學系暨研究所] 期刊論文

    文件中的档案:

    档案 描述 大小格式浏览次数
    Frequency and nature of central molecular outflows in nearby star-forming disk galaxies.pdf9783KbAdobe PDF2检视/开启
    index.html0KbHTML140检视/开启

    在機構典藏中所有的数据项都受到原著作权保护.

    TAIR相关文章

    DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library & TKU Library IR teams. Copyright ©   - 回馈