A direct measurement of the forward shock speed in supernova remnant ``0519-69.0'': Constraints on the age, ambient density and electron-ion temperature equilibration
Abstract
The supernova remnant 0519-69.0 is the second youngest Ia remnant in the Large Magellanic Cloud. The typing of the remnant rests primarily on ejecta abundances inferred from X-ray spectra and the Balmer-dominated nature of its forward shock. Using two narrow-band Hα imaging with the Hubble Space Telescope separated by ~1 year we are able to measure the global shock velocity of the remnant to be 2780 km/s. Using the global shock speed with the measured size of the remnant as constraints we employ one-dimensional hydrodynamic simulations to constrain the age and ambient medium density of the remnant. We also report on the degree of electron-to-ion temperature ratios for select portions of the rim for which we have spectroscopic measurements using the Robert Stobie Spectrograph on the Southern African Large Telescope.
- Publication:
-
Supernova Remnants: An Odyssey in Space after Stellar Death
- Pub Date:
- June 2016
- Bibcode:
- 2016sros.confE..71H