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GMRT observations of four suspected supernova remnants near the Galactic Centre | | Subhashis Roy
; A. Pramesh Rao
; | | Date: |
4 Oct 2001 | | Journal: | Mon.Not.Roy.Astron.Soc. 329 (2002) 775 | | Subject: | astro-ph | | Affiliation: | NCRA-TIFR, Pune, India | | Abstract: | We have observed two fields - Field-I (l=3.2 degrees, b=-1.0 degree) and Field-II (l=356.8 degrees, b=-0.1 degree) with the Giant Metrewave Radio Telescope (GMRT) at 330 MHz. In the first field, we have studied the candidate supernova remnant (SNR) G3.1-0.6 and based on its observed morphology, spectral index and polarisation confirmed it to be an SNR. We find this supernova to have a double ring appearance with a strip of emission on it’s western side passing through it’s centre. We have discovered two extended curved objects in the second field, which appears to be part of a large shell like structure. It is possibly the remains of an old supernova in the region. Three suspected supernova remnants, G356.3-0.3, G356.6+0.1 and G357.1-0.2 detected in the MOST 843 MHz survey of the Galactic Centre region appears to be located on this shell like structure. While both G356.3-0.3 and G356.6+0.1 seem to be parts of this shell, G357.1-0.2 which has a steeper spectrum above 1 GHz, could be a background SNR seen through the region. Our HI absorption observation towards the candidate SNR G357.1-0.2 indicates that it is at a distance of more than 6 kpc from us. | | Source: | arXiv, astro-ph/0110104 | | Services: | Forum | Review | PDF | Favorites | |
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