SISSI: Supernovae in a stratified, shearing interstellar medium -- I. The geometry of supernova remnants

Abstract

Aims. We introduce the SISSI (Supernovae In a Stratified, Shearing Interstellar medium) simulation suite, which aims to enable a more comprehensive understanding of supernova remnants (SNRs) evolving in a complex interstellar medium (ISM) structured under the influence of galactic rotation, gravity and turbulence. Methods. We utilize zoom-in simulations of 30 SNRs expanding in the ISM of a simulated isolated disk galaxy. The ISM of the galaxy is resolved down to a maximum resolution of $\sim 12\text{pc}$, while we achieve a zoomed-in resolution of $\sim 0.18\text{pc}$ in the vicinity of the explosion sources. We compute the time-evolution of the SNRs' geometry and compare it to the observed geometry of the Local Bubble. Results. During the early stages of evolution, SNRs are well described by existing analytical models. On longer timescales, starting at about a percent of the orbital timescale, they depart from spherical symmetry and become increasingly prolate or oblate. The timescale for the departure from spherical symmetry is shorter than the expectation from a simple model for the deformation by galactic shear, suggesting that galactic shear alone cannot explain these differences. Yet, the alignment of the minor- and major axis of the SNRs is in line with expectations from said model, indicating that the deformation might have a shear-related origin. A comparison with the geometry of the Local Bubble reveals that it might be slightly younger than previously believed, but otherwise has a standard morphology for a SNR of its age and size. Conclusions. Studying the geometry of SNRs can reveal valuable insights about the complex interactions shaping their dynamical evolution. Future studies targeting the geometry of Galactic SNRs may use this insight to obtain a clearer picture of the processes shaping the Galactic ISM.

Accepted for submission in Astronomy & Astrophysics. 18 pages, 19 figures

References in corpus (24)

• Gaia Data Release 3: Summary of the content and survey properties
• Momentum Injection by Supernovae in the Interstellar Medium
• Gaia-2MASS 3D maps of Galactic interstellar dust within 3 kpc
• Star formation near the Sun is driven by expansion of the Local Bubble
• A parsec-scale Galactic 3D dust map out to 1.25 kpc from the Sun
• An Exact Integration Scheme for Radiative Cooling in Hydrodynamical Simulations
• The History and Future of the Local and Loop I Bubbles
• Radiative cooling rates, ion fractions, molecule abundances and line emissivities including self-shielding and both local and metagalactic radiation fields
• Efficiently Cooled Stellar Wind Bubbles in Turbulent Clouds II. Validation of Theory with Hydrodynamic Simulations
• CLASSY III: The Properties of Starburst-Driven Warm Ionized Outflows
• PHANGS-JWST First Results: A statistical view on bubble evolution in NGC628
• The Per-Tau Shell: A Giant Star-Forming Spherical Shell Revealed by 3D Dust Observations
• Osaka Feedback Model: Isolated Disk Galaxy Simulations
• Osaka Feedback Model II: Modeling Supernova Feedback Based on High-Resolution Simulations
• Supernovae feedback propagation: the role of turbulence
• SRG/eROSITA discovery of a radio faint X-ray candidate supernova remnant SRGe J003602.3+605421=G121.1-1.9
• The SRG/eROSITA diffuse soft X-ray background. I. The local hot bubble in the western Galactic hemisphere
• Discovery of an Exceptional Optical Nebulosity in the Suspected Galactic SN Iax Remnant Pa 30 Linked to the Historical Guest Star of 1181 CE
• Discovery of $\sim$2200 new supernova remnants in 19 nearby star-forming galaxies with MUSE spectroscopy
• Weather Forecast of the Milky Way: Shear and Stellar feedback determine the lives of Galactic-scale filaments
• How do supernova remnants cool? -- I. Morphology, optical emission lines, and shocks
• Gas Cooling in Hydrodynamic Simulations with An Exact Time Integration Scheme
• Cloud Formation by Supernova Implosion
• H$\alpha$ Kinematics of Superbubbles and Supernova Remnants of the Dwarf galaxy NGC 4214