A Hydro-Based MCMC Analysis of SNR 0509-67.5 Revealing the Explosion Properties from Fluid Discontinuities Alone

Abstract

Using HST narrow-band Hα images of supernova remnant 0509-67.5 taken {\sim}10 years apart, we measure the forward shock (FS) proper motions (PMs) at 231 rim locations. The average shock radius and velocity are 3.66 {\pm} 0.036 pc and 6315 {\pm} 310 km s{^{-1}}. Hydrodynamic simulations, recast as similarity solutions, provide models for the remnant's expansion into a uniform ambient medium. These are coupled to a Markov chain Monte Carlo (MCMC) analysis to determine explosion parameters, constrained by the FS measurements. For specific global parameters, the MCMC posterior distributions yield an age of 315.5 {\pm} 1.8 yr, a dynamical explosion center at 5h09m31s.16s -67{^\circ}31{^\prime}17.1{^{\prime\prime}} and ambient medium densities at each azimuth ranging from 3.7-8.0 {\times} 10{^{-25}} g cm{^{-3}}. We can detect stellar PMs corresponding to speeds in the LMC of 770 km s{^{-1}} or more using the H$\alpha$ images. Five stars in the remnant show measurable PMs but none appear to be moving radially from the center, including a prominent red star 4.6{^{\prime\prime}} from the center. Using coronal [Fe XIV] λ5303 emission as a proxy for the reverse shock location, we constrain the explosion energy (for a compression factor of 4) to a value of E = (1.30 {\pm} 0.41) {\times} 10{^{51}} erg for the first time from shock kinematics alone. Higher compression factors (7 or more) are strongly disfavored based on multiple criteria, arguing for inefficient particle acceleration in the Balmer shocks of 0509-67.5.

arXiv comment19 pages, 9 figures, 4 tables

References in corpus (40)

• Array Programming with NumPy
• Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant
• Measurements of Omega and Lambda from 42 High-Redshift Supernovae
• Astropy: A Community Python Package for Astronomy
• emcee: The MCMC Hammer
• Gaia Data Release 2. Summary of the contents and survey properties
• Gaia Data Release 2: The astrometric solution
• A distance to the Large Magellanic Cloud that is precise to one per cent
• New Understanding of Large Magellanic Cloud Structure, Dynamics and Orbit from Carbon Star Kinematics
• Cosmic Ray Acceleration at the Forward Shock in Tycho's Supernova Remnant: Evidence from Chandra X-ray Observations
• Helium-ignited violent mergers as a unified model for normal and rapidly declining Type Ia Supernovae
• Three Hypervelocity White Dwarfs in Gaia DR2: Evidence for Dynamically Driven Double-Degenerate Double-Detonation Type Ia Supernovae
• Surface Detonations in Double Degenerate Binary Systems Triggered by Accretion Stream Instabilities
• An Empirical Pixel-Based Correction for Imperfect CTE. I. HST's Advanced Camera for Surveys
• Tycho Brahe's 1572 supernova as a standard type Ia explosion revealed from its light echo spectrum
• Echoes from Ancient Supernovae in the Large Magellanic Cloud
• Spin-Up/Spin-Down models for Type Ia Supernovae
• Thermal X-ray Emission and Cosmic Ray Production in Young Supernova Remnants
• Spectral Identification of an Ancient Supernova using Light Echoes in the LMC
• Remnants of Binary White Dwarf Mergers
• Spatial Structure and Collisionless Electron Heating in Balmer-dominated Shocks
• SMASHing the LMC: A Tidally-induced Warp in the Outer LMC and a Large-scale Reddening Map
• Dust Destruction in Type Ia Supernova Remnants in the Large Magellanic Cloud
• Hydrodynamic Simulation of Supernova Remnants Including Efficient Particle Acceleration
• The Persistence of Memory, or How the X-Ray Spectrum of SNR 0509-67.5 Reveals the Brightness of its Parent Type Ia Supernova
• Iron-Rich Ejecta in the Supernova Remnant DEM L71
• Cosmic ray production in supernovae
• X-ray Measurements of the Particle Acceleration Properties at Inward Shocks in Cassiopeia A
• Raising the Dead: Clues to Type Ia Supernova Physics from the Remnant 0509-67.5
• White Dwarf/M Dwarf Binaries as Single Degenerate Progenitors of Type Ia Supernovae
• Optical tomography of chemical elements synthesized in Type Ia supernovae
• An Integral View of Fast Shocks around Supernova 1006
• Time-Dependent Escape of Cosmic Rays from Supernova Remnants, and their Interaction with Dense Media
• The Detection of Far Ultraviolet Line Emission from Balmer-Dominated Supernova Remnants in the Large Magellanic Cloud
• Identification of the companion stars of Type Ia supernovae
• Search for surviving companions in type Ia supernova remnants
• Dusty Blastwaves of Two Young LMC Supernova Remnants: Constraints on Postshock Compression
• Broad Balmer line emission and cosmic ray acceleration efficiency in supernova remnant shocks
• Constraints on Cosmic-ray Acceleration Efficiency in Balmer Shocks of Two Young Type Ia Supernova Remnants in the Large Magellanic Cloud
• Parametric studies of cosmic ray acceleration in supernova remnants

Cited by in corpus (4)

• Electron-Ion Temperature Ratio in Astrophysical Shocks
• No Surviving SN Ia Companion In SNR 0509-67.5: Stellar Population Characterization and Comparison To Models
• Deciphering the explosion mechanism of Type Ia SNe using their remnants II: a deep dive into double detonations with SNR 0509-67.5
• Deep MUSE observations of SNR 0509-67.5 reveal a double degenerate merger progenitor