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Bursting Bubbles: Feedback from Clustered Supernovae and the Trade-off Between Turbulence and Outflows

Orr, Matthew E. and Fielding, Drummond B. and Hayward, Christopher C. and Burkhart, Blakesley (2022) Bursting Bubbles: Feedback from Clustered Supernovae and the Trade-off Between Turbulence and Outflows. Astrophysical Journal, 932 (2). Art. No. 88. ISSN 0004-637X. doi:10.3847/1538-4357/ac6c26.

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We present an analytic model for clustered supernovae (SNe) feedback in galaxy disks, incorporating the dynamical evolution of superbubbles formed from spatially overlapping SNe remnants. We propose two realistic outcomes for the evolution of superbubbles in galactic disks: (1) the expansion velocity of the shock front falls below the turbulent velocity dispersion of the interstellar medium in the galaxy disk, whereupon the superbubble stalls and fragments, depositing its momentum entirely within the galaxy disk; or (2) the superbubble grows in size to reach the gas scale height, breaking out of the galaxy disk and driving galactic outflows/fountains. In either case, we find that superbubble breakup/breakout almost always occurs before the last Type II SN (≲40 Myr) in the recently formed star cluster, assuming a standard high-end initial mass function slope, and scalings between stellar lifetimes and masses. The threshold between these two cases implies a break in the effective strength of feedback in driving turbulence within galaxies, and a resulting change in the scalings of, for example, star formation rates with gas surface density (the Kennicutt–Schmidt relation) and the star formation efficiency in galaxy disks.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Orr, Matthew E.0000-0003-1053-3081
Fielding, Drummond B.0000-0003-3806-8548
Hayward, Christopher C.0000-0003-4073-3236
Burkhart, Blakesley0000-0001-5817-5944
Additional Information:© 2022. The Author(s). Published by the American Astronomical Society. Original content from this work may be used under the terms of the Creative Commons Attribution 4.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. Received 2021 September 23; revised 2022 March 22; accepted 2022 May 1; published 2022 June 17. M.E.O. is grateful for the encouragement of his late father, S.R.O., in studying astrophysics. We thank Alex Gurvich, Lee Armus, and Phil Hopkins for conversations relating this model to disk formation at intermediate redshifts, and connections with spatially resolved observations and superwinds. We also would like to thank the anonymous reviewer for their comments that greatly improved the manuscript. M.E.O. was supported by the National Science Foundation Graduate Research Fellowship under grant No. 1144469. The Flatiron Institute is supported by the Simons Foundation. We thank Lucy Reading-Ikkanda/Simons Foundation for assistance with developing Figure 1. This research has made use of NASA's Astrophysics Data System. B.B. is grateful for support from the Packard Fellowship and Sloan Fellowship.
Funding AgencyGrant Number
NSF Graduate Research FellowshipDGE-1144469
Simons FoundationUNSPECIFIED
David and Lucile Packard FoundationUNSPECIFIED
Alfred P. Sloan FoundationUNSPECIFIED
Subject Keywords:Supernova remnants; Superbubbles; Star formation; Interstellar medium; Galaxy evolution; Stellar feedback
Issue or Number:2
Classification Code:Unified Astronomy Thesaurus concepts: Supernova remnants (1667); Superbubbles (1656); Star formation (1569); Interstellar medium (847); Galaxy evolution (594); Stellar feedback (1602)
Record Number:CaltechAUTHORS:20220722-768845000
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Official Citation:Matthew E. Orr et al 2022 ApJ 932 88
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:115771
Deposited By: George Porter
Deposited On:26 Jul 2022 20:23
Last Modified:26 Jul 2022 20:23

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