Expansion and Age of the Supernova Remnant G350.1-0.3: High-velocity Iron Ejecta from a Core-collapse Event
Abstract
We report Chandra observations of the highly asymmetric core-collapse supernova remnant G350.1-0.3. We document expansion over 9 yr away from the roughly stationary central compact object, with sky-plane velocities up to 5000 d4.5 km s-1 (d4.5 is the distance in units of 4.5 kpc), redshifts ranging from 900 to 2600 km s-1, and three-dimensional space velocities approaching 6000 km s-1. Most of the bright emission comes from heavy-element ejecta particularly strong in iron. Iron-enhanced ejecta are seen at 4000-6000 km s-1, strongly suggesting that the supernova was not a common Type IIP event. While some fainter regions have roughly solar abundances, we cannot identify clear blast-wave features. Our expansion proper motions indicate that G350.1-0.3 is no more than about 600 yr old, independent of distance: the third youngest known core-collapse supernova in the Galaxy, and one of the most asymmetric.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- December 2020
- DOI:
- 10.3847/2041-8213/abcda7
- arXiv:
- arXiv:2011.12977
- Bibcode:
- 2020ApJ...905L..19B
- Keywords:
-
- Supernova remnants;
- Core-collapse supernovae;
- Ejecta;
- X-ray astronomy;
- 1667;
- 304;
- 453;
- 1810;
- Astrophysics - High Energy Astrophysical Phenomena
- E-Print:
- 8 pages, 4 figures, ApJ Letters in press, minor revisions