The first optical light from the supernova remnant G182.4+4.3 located in the Galactic anticentre region

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2012-12-01
Sezer, A.
GÖK, FATMA
Aktekin, E.
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 H alpha 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]/H alpha ratio is found to be similar to 0.9 and similar to 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 similar to 7.3 x 10(31) 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 similar to 4400 yr for this remnant, given its large radius of similar to 22 pc.

Citation Formats
A. Sezer, F. GÖK, and E. Aktekin, “The first optical light from the supernova remnant G182.4+4.3 located in the Galactic anticentre region,” MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, vol. 427, no. 2, pp. 1168–1174, 2012, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/67209.