| 13th of February 2017 |
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| LOFAR's Multifrequency Snapshot Sky Survey (MSSS) |
| by George Heald (CASS) |
| LOFAR's Multifrequency Snapshot Sky Survey
(MSSS) is the northern-sky analog to the MWA's GLEAM survey. MSSS has resulted in the discovery
and detailed study of a new 2.56 Mpc giant radio galaxy (GRG) associated with
a disturbed galaxy group (UGC 9555). This image illustrates the huge extent of
radio emission, stretching larger on the sky than the full moon! LOFAR contours
are displayed in white, and the VLA's NVSS 1.4 GHz survey in red. The inset
shows the host galaxy group. Lime green contours from FIRST show compact radio
emission from the AGN and its jet. Coloured contours are smoothed SDSS bands,
indicating the disturbed nature of the group that hosts this interesting radio
source. The paper describing the discovery of the GRG, along with a description of the very interesting host galaxy group and the large-scale structure in that region of the cosmos, has recently been accepted for publication in A&A. It will be followed up with a detailed analysis of the morphology and evolution of the source, based on a high-resolution LOFAR observation motivated by the MSSS discovery. Related paper: Clarke, Heald et al. "LOFAR MSSS: Discovery of a 2.56 Mpc giant radio galaxy associated with a disturbed galaxy group" (2017), Astronomy and Astrophysics (accepted) |