English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

Using HST narrow-band H{\alpha} images of supernova remnant 0509-67.5 taken{\sim}10 years apart, we measure the forward shock (FS) proper motions (PMs) at231 rim locations. The average shock radius and velocity are 3.66 {\pm} 0.036pc and 6315 {\pm} 310 km s{^{-1}}. Hydrodynamic simulations, recast assimilarity solutions, provide models for the remnant's expansion into a uniformambient medium. These are coupled to a Markov chain Monte Carlo (MCMC) analysisto determine explosion parameters, constrained by the FS measurements. Forspecific global parameters, the MCMC posterior distributions yield an age of315.5 {\pm} 1.8 yr, a dynamical explosion center at 5h09m31s.16s-67{^\circ}31{^\prime}17.1{^{\prime\prime}} and ambient medium densities ateach azimuth ranging from 3.7-8.0 {\times} 10{^{-25}} g cm{^{-3}}. We candetect stellar PMs corresponding to speeds in the LMC of 770 km s{^{-1}} ormore using the H${\alpha}$ images. Five stars in the remnant show measurablePMs but none appear to be moving radially from the center, including aprominent red star 4.6{^{\prime\prime}} from the center. Using coronal [Fe XIV]{\lambda}5303 emission as a proxy for the reverse shock location, we constrainthe 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 kinematicsalone. Higher compression factors (7 or more) are strongly disfavored based onmultiple criteria, arguing for inefficient particle acceleration in the Balmershocks of 0509-67.5.

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