PHANGS–JWST First Results: ISM structure on the turbulent Jeans scale in four disk galaxies observed by JWST and ALMA

Meidt, S.E.; Rosolowsky, E.; Sun, J.; Koch, E.W.; Klessen, R.S.; Leroy, A.K.; Schinnerer, E.; Barnes, A.T.; Glover Simon, C.O.; Lee, J.C.; van der Wel, A.; Watkins, E.J.; Williams, T.G.; Bigiel, F.; Boquien, M.; Blanc, G.A.; Cao, Y.; Chevance, M.; Dale, D.A.; Egorov, O.V.; Emsellem, E.; Grasha, K.; Henshaw, J.D.; Kruijssen, J.M.; Larson, K.L.; Liu, D.; Murphy, E.J.; Pety, J.; Querejeta, M.; Saito, T.; Sandstrom, K.M.; Smith, R.J.; Sormani, M.C.; Thilker, D.A.

Авторы: Meidt Sharon E., Rosolowsky Erik, Sun Jiayi, Koch Eric W., Klessen Ralf S., Leroy Adam K., Schinnerer Eva, Barnes Ashley T., Glover Simon C.O., Lee Janice C., van der Wel Arjen, Watkins Elizabeth J., Williams Thomas G., Bigiel Frank, Boquien Médéric, Blanc Guillermo A., Cao Yixian, Chevance Mélanie, Dale Daniel A., Egorov Oleg V., Emsellem Eric, Grasha Kathryn, Henshaw Jonathan D., Kruijssen J.M.Diederik, Larson Kirsten L., Liu Daizhong, Murphy Eric J., Pety Jérôme, Querejeta Miguel, Saito Toshiki, Sandstrom Karin M., Smith Rowan J., Sormani Mattia C., Thilker David A.
Журнал: Astrophysical Journal Letters
Том: 944
Год издания: 2023
Номер статьи: L18
DOI: 10.3847/2041-8213/acaaa8
Аннотация: 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.
Добавил в систему: Егоров Олег Владимирович

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PHANGS–JWST First Results: ISM structure on the turbulent Jeans scale in four disk galaxies observed by JWST and ALMAстатья