论文标题
phangs - jwst的首先结果：湍流牛仔裤尺度上的ISM结构在JWST和Alma观察到的四个磁盘星系中
PHANGS--JWST First Results: ISM structure on the turbulent Jeans scale in four disk galaxies observed by JWST and ALMA
论文作者
论文摘要
附近星系IC 5332，NGC 628，NGC 1365和NGC 7496的JWST/MIRI成像揭示了一系列的气体结构，在每种情况下，在每种情况下形成了互连的细丝，壳，壳，壳和voids的准正规网络。我们检查了这种多尺度结构网络是否与通过重力不稳定性的气盘碎片化一致。我们使用filfinder检测每个星系中的丝状特征的网络，并确定它们的特征性径向和方位角间距。然后将这些间距与对最不稳定的长度（几个kpc），湍流牛仔裤长度（几百个PC）和磁盘尺度（数十个PC）的估计值进行比较。我们对这项工作中针对的四个星系的分析表明，牛仔裤规模的结构无处不在。未来的工作对于确定气盘中观察到的结构不仅影响恒星形成的速率和位置至关重要，而且还会影响恒星反馈与周围的多相气体储层的积极或负相互作用。
JWST/MIRI imaging of the nearby galaxies IC 5332, NGC 628, NGC 1365 and NGC 7496 from PHANGS reveals a richness of gas structures that in each case form a quasi-regular network of interconnected filaments, shells and voids. We examine whether this multi-scale network of structure is consistent with the fragmentation of the gas disk through gravitational instability. We use FilFinder to detect the web of filamentary features in each galaxy and determine their characteristic radial and azimuthal spacings. These spacings are then compared to estimates of the most Toomre-unstable length (a few kpc), the turbulent Jeans length (a few hundred pc) and the disk scale height (tens of pc) reconstructed using PHANGS-ALMA observations of the molecular gas as a dynamical tracer. Our analysis of the four galaxies targeted in this work indicates that Jeans-scale structure is pervasive. Future work will be essential for determining how the structure observed in gas disks impacts not only the rate and location of star formation but also how stellar feedback interacts positively or negatively with the surrounding multi-phase gas reservoir.
