A Hydro-based MCMC Analysis of SNR 0509–67.5: Revealing the Explosion Properties from Fluid Discontinuities Alone
Journal Article
·
· The Astrophysical Journal
- Rutgers Univ., Piscataway, NJ (United States)
- Mission Support and Test Services, LLC (MSTS), Los Alamos, NM (United States); Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Using Hubble Space Telescope/ACS Hα images of SNR 0509–67.5 taken ~10 yr apart, we measure the forward shock (FS) proper motions (PMs) at 231 rim locations. The average shock radius and velocity are 3.66 ± 0.036 pc and 6315 ± 310 km s–1. Hydrodynamic simulations, recast as similarity solutions, provide models for the supernova 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 our baseline model, the MCMC posteriors yield an age of 315.5 ± 1.8 yr, a dynamical explosion center at 5h09m31.s16, $$-67^\circ 31^{\prime} 17\buildrel{\prime\prime}\over{.} 1$$ and ambient medium densities at each azimuth ranging over 3.7–8.0 × 10–25 g cm–3. The age uncertainty can be an order of magnitude larger when considering other models, or subsets of the data. We detect stellar PMs corresponding to speeds in the Large Magellanic Cloud ≥ 770 km s–1. Five stars in the remnant show measurable PMs but none are moving radially from the dynamical center. There are four stars 1."4 from the center, including three faint, previously unidentified ones. 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 ± 0.41) × 1051 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 SNR 0509–67.5.
- Research Organization:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- Sponsoring Organization:
- National Aeronautics and Space Administration (NASA); USDOE
- Grant/Contract Number:
- 89233218CNA000001
- OSTI ID:
- 1900481
- Report Number(s):
- LA-UR-21-32466
- Journal Information:
- The Astrophysical Journal, Journal Name: The Astrophysical Journal Journal Issue: 2 Vol. 938; ISSN 0004-637X
- Publisher:
- IOP PublishingCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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A Direct Measurement of the Forward Shock Speed in Supernova Remnant 0509–67.5: Constraints on the Age, Ambient Density, Shock Compression Factor, and Electron-Ion Temperature Equilibration
A direct measurement of the forward shock speed in supernova remnant 0509–67.5: Constraints on the age, ambient density, shock compression factor, and electron–ion temperature equilibration
Journal Article
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Fri Jun 20 00:00:00 EDT 2014
· Astrophysical Journal
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OSTI ID:22356554
A Direct Measurement of the Forward Shock Speed in Supernova Remnant 0509–67.5: Constraints on the Age, Ambient Density, Shock Compression Factor, and Electron-Ion Temperature Equilibration
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Wed Aug 19 20:00:00 EDT 2015
· The Astrophysical Journal (Online)
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OSTI ID:1471330
A direct measurement of the forward shock speed in supernova remnant 0509–67.5: Constraints on the age, ambient density, shock compression factor, and electron–ion temperature equilibration
Journal Article
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Thu Aug 20 00:00:00 EDT 2015
· Astrophysical Journal
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OSTI ID:22882780