Comparing the pre-SNe feedback and environmental pressures for 6000 H II regions across 19 nearby spiral galaxies
Article
Article Title | Comparing the pre-SNe feedback and environmental pressures for 6000 H II regions across 19 nearby spiral galaxies |
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ERA Journal ID | 1074 |
Article Category | Article |
Authors | Barnes, A. T., Glover, S. C. O., Kreckel, K., Ostriker, E. C., Bigiel, F., Belfiore, F., Bešlić, I., Blanc, G. A., Chevance, M., Dale, D. A., Egorov, O., Eibensteiner, C., Emsellem, E., Grasha, K., Groves, B. A., Klessen, R. S., Kruijssen, J. M. D., Leroy, A. K., Longmore, S. N., Lopez, L., McElroy, R., Meidt, S. E., Murphy, E .J., Rosolowsky, E., Saito, T., Santoro, F., Schinnerer, E., Schruba, A., Sun, J., Watkins, E. J. and Williams, T. G. |
Journal Title | Monthly Notices of the Royal Astronomical Society |
Journal Citation | 508 (4), pp. 5362-5389 |
Number of Pages | 28 |
Year | 2021 |
Publisher | Oxford University Press |
Place of Publication | United Kingdom |
ISSN | 0035-8711 |
1365-2966 | |
Digital Object Identifier (DOI) | https://doi.org/10.1093/mnras/stab2958 |
Web Address (URL) | https://academic.oup.com/mnras/article/508/4/5362/6402924 |
Abstract | The feedback from young stars (i.e. pre-supernova) is thought to play a crucial role in molecular cloud destruction. In this paper, we assess the feedback mechanisms acting within a sample of 5810 H II regions identified from the PHANGS-MUSE survey of 19 nearby (<20 Mpc) star-forming, main-sequence spiral galaxies [log(M⋆/M⊙) = 9.4–11]. These optical spectroscopic maps are essential to constrain the physical properties of the H II regions, which we use to investigate their internal pressure terms. We estimate the photoionized gas (Ptherm), direct radiation (Prad), and mechanical wind pressure (Pwind), which we compare to the confining pressure of their host environment (Pde). The H II regions remain unresolved within our ∼50–100 pc resolution observations, so we place upper (Pmax) and lower (Pmin) limits on each of the pressures by using a minimum (i.e. clumpy structure) and maximum (i.e. smooth structure) size, respectively. We find that the Pmax measurements are broadly similar, and for Pmin the Ptherm is mildly dominant. We find that the majority of H II regions are overpressured, Ptot/Pde = (Ptherm + Pwind + Prad)/Pde > 1, and expanding, yet there is a small sample of compact H II regions with Ptot,max/Pde < 1 (∼1 per cent of the sample). These mostly reside in galaxy centres (Rgal < 1 kpc), or, specifically, environments of high gas surface density; log(Σgas/M⊙ pc−2) ∼ 2.5 (measured on kpc-scales). Lastly, we compare to a sample of literature measurements for Ptherm and Prad to investigate how dominant pressure term transitions over around 5 dex in spatial dynamic range and 10 dex in pressure. |
Keywords | ISM: general; ISM: structure; H II regions; galaxies: ISM; galaxies: star formation |
Contains Sensitive Content | Does not contain sensitive content |
ANZSRC Field of Research 2020 | 510102. Astronomical instrumentation |
Public Notes | Files associated with this item cannot be displayed due to copyright restrictions, but may be accessed online. Please see the link in the URL field. |
Byline Affiliations | University of Bonn, Germany |
Heidelberg University, Germany | |
Princeton University, United States | |
INAF - Arcetri Astrophysical Observatory, Italy | |
Carnegie Institution for Science, United States | |
University of Chile, Chile | |
Aarhus University, Denmark | |
Lomonosov Moscow State University, Russia | |
European Southern Observatory (ESO), Germany | |
Australian National University | |
University of Western Australia | |
Ohio State University, United States | |
Liverpool John Moores University, United Kingdom | |
Max Planck Institute for Astronomy, Germany | |
University of Gent, Belgium | |
National Radio Astronomy Observatory, United States | |
University of Alberta, Canada | |
Max Planck Institute for Extraterrestrial Physics, Germany |
https://research.usq.edu.au/item/z75v4/comparing-the-pre-sne-feedback-and-environmental-pressures-for-6000-h-ii-regions-across-19-nearby-spiral-galaxies
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