The first optical light from the supernova remnant G182.4+4.3 located in the Galactic anticentre region
Abstract
We report the discovery of optical filamentary and diffuse emission from G182.4+4.3 using the 1.5-m Russian-Turkish telescope. We present the optical CCD images obtained with the Hα filter, revealing the presence of mainly filamentary structure to the north-west and filamentary and diffuse structure in the centre, south and north regions of the remnant. The bright optical filaments located in the north-west and south regions are well correlated with the prominent radio shell of the remnant, strongly suggesting an association. From the flux-calibrated CCD imaging, the average [S II]/Hα ratio is found to be ∼0.9 and ∼1.1 for south and north-west regions, respectively, which clearly indicates that the emission originates from shock-heated gas. We also present the results of X-ray data obtained from XMM-Newton, showing diffuse emission with a very low luminosity of ∼7.3 × 1031 erg s-1 at a distance of 3 kpc in the 0.3-10 keV energy band. Furthermore, we find a surprisingly low age of ∼4400 yr for this remnant, given its large radius of ∼22 pc.
- Publication:
-
Monthly Notices of the Royal Astronomical Society
- Pub Date:
- December 2012
- DOI:
- 10.1111/j.1365-2966.2012.22015.x
- arXiv:
- arXiv:1208.5990
- Bibcode:
- 2012MNRAS.427.1168S
- Keywords:
-
- ISM: individual objects: G182.4+4.3;
- ISM: supernova remnants;
- X-rays: ISM;
- Astrophysics - High Energy Astrophysical Phenomena;
- Astrophysics - Astrophysics of Galaxies
- E-Print:
- 9 pages, 6 figures and 1 table, Accepted for publication in MNRAS