G306.3-0.9: A Newly Discovered Young Galactic Supernova Remnant
Abstract
We present X-ray and radio observations of the new Galactic supernova remnant (SNR) G306.3-0.9, recently discovered by Swift. Chandra imaging reveals a complex morphology, dominated by a bright shock. The X-ray spectrum is broadly consistent with a young SNR in the Sedov phase, implying an age of 2500 yr for a distance of 8 kpc, plausibly identifying this as one of the 20 youngest Galactic SNRs. Australia Telescope Compact Array imaging reveals a prominent ridge of radio emission that correlates with the X-ray emission. We find a flux density of ~160 mJy at 1 GHz, which is the lowest radio flux recorded for a Galactic SNR to date. The remnant is also detected at 24 μm, indicating the presence of irradiated warm dust. The data reveal no compelling evidence for the presence of a compact stellar remnant.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- April 2013
- DOI:
- 10.1088/0004-637X/766/2/112
- arXiv:
- arXiv:1303.3546
- Bibcode:
- 2013ApJ...766..112R
- Keywords:
-
- ISM: individual objects:: G306.3-0.9;
- ISM: supernova remnants;
- Astrophysics - High Energy Astrophysical Phenomena
- E-Print:
- 6 pages, 4 figures, 1 table, formatted using emulateapj.cls. Accepted for publication in ApJ