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The impact of pre-supernova feedback and its dependence on environment

McLeod, Anna F; Ali, Ahmad A; Chevance, Mélanie; Bruna, Lorenza Della; Schruba, Andreas; Stevance, Heloise F; Adamo, Angela; Kruijssen, JM Diederik; Longmore, Steven N; Weisz, Daniel R; Zeidler, Peter

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Ahmad A Ali

Mélanie Chevance

Lorenza Della Bruna

Andreas Schruba

Heloise F Stevance

Angela Adamo

JM Diederik Kruijssen

Steven N Longmore

Daniel R Weisz

Peter Zeidler


Integral field units enable resolved studies of a large number of star-forming regions across entire nearby galaxies, providing insight on the conversion of gas into stars and the feedback from the emerging stellar populations over unprecedented dynamic ranges in terms of spatial scale, star-forming region properties, and environments. We use the Very Large Telescope (VLT) MUSE (Multi Unit Spectroscopic Explorer) legacy data set covering the central 35 arcmin2 (∼12 kpc2) of the nearby galaxy NGC 300 to quantify the effect of stellar feedback as a function of the local galactic environment. We extract spectra from emission line regions identified within dendrograms, combine emission line ratios and line widths to distinguish between HII regions, planetary nebulae, and supernova remnants, and compute their ionized gas properties, gas-phase oxygen abundances, and feedback-related pressure terms. For the HII regions, we find that the direct radiation pressure (Pdir) and the pressure of the ionized gas (⁠PHII⁠) weakly increase towards larger galactocentric radii, i.e. along the galaxy’s (negative) abundance and (positive) extinction gradients. While the increase of PHII with galactocentric radius is likely due to higher photon fluxes from lower-metallicity stellar populations, we find that the increase of Pdir is likely driven by the combination of higher photon fluxes and enhanced dust content at larger galactocentric radii. In light of the above, we investigate the effect of increased pre-supernova feedback at larger galactocentric distances (lower metallicities and increased dust mass surface density) on the ISM, finding that supernovae at lower metallicities expand into lower-density environments, thereby enhancing the impact of supernova feedback.


McLeod, A. F., Ali, A. A., Chevance, M., Bruna, L. D., Schruba, A., Stevance, H. F., …Zeidler, P. (2021). The impact of pre-supernova feedback and its dependence on environment. Monthly Notices of the Royal Astronomical Society, 508(4), 5425-5448.

Journal Article Type Article
Acceptance Date Sep 17, 2021
Online Publication Date Sep 25, 2021
Publication Date 2021-12
Deposit Date Oct 31, 2021
Publicly Available Date Dec 8, 2021
Journal Monthly Notices of the Royal Astronomical Society
Print ISSN 0035-8711
Electronic ISSN 1365-2966
Publisher Royal Astronomical Society
Peer Reviewed Peer Reviewed
Volume 508
Issue 4
Pages 5425-5448


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Copyright Statement
© The Author(s) 2021. Published by Oxford University Press on behalf of Royal Astronomical Society.<br /> This is an Open Access article distributed under the terms of the Creative Commons Attribution License (, which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited.

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