Momentum Injection by Supernovae in the Interstellar Medium
Chang-Goo Kim, Eve C. Ostriker (Princeton University)

TL;DR
This study uses 3D hydrodynamic simulations to quantify how supernovae inject momentum into the interstellar medium, revealing that environmental inhomogeneity has minimal impact on the momentum delivered.
Contribution
It provides a systematic analysis of supernova momentum injection in realistic inhomogeneous ISM conditions, including a detailed numerical convergence study.
Findings
Supernovae inject a nearly constant momentum of about 2.8×10^5 M_sun km/s at mean densities.
Inhomogeneity causes complex remnant morphology but little change in total momentum injection.
Resolution requirements for accurate simulations are established, with dx and r_init less than one-third of the shell formation radius.
Abstract
Supernova (SN) explosions deposit prodigious energy and momentum in their environments, with the former regulating multiphase thermal structure and the latter regulating turbulence and star formation rates in the interstellar medium (ISM). However, systematic studies quantifying the impact of SNe in realistic inhomogeneous ISM conditions have been lacking. Using three-dimensional hydrodynamic simulations, we investigate the dependence of radial momentum injection on both physical conditions (considering a range of mean density n=0.1-100) and numerical parameters. Our inhomogeneous simulations adopt two-phase background states that result from thermal instability in atomic gas. Although the SNR morphology becomes highly complex for inhomogeneous backgrounds, the radial momentum injection is remarkably insensitive to environmental details. For our two-phase simulations, the final momentum…
Peer Reviews
No public reviews on file for this paper yet. If you reviewed it on a platform where reviews are public (OpenReview, ICLR, NeurIPS, ICML), you can paste yours below so the community can read it here.
Videos
No videos yet. Explain this paper in a talk, walkthrough, or lecture? Add one.
