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Morphological classification of radio sources for galaxy evolution and cosmology with SKA-MID

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arxiv 1412.5990 v1 pith:QOSZFSG7 submitted 2014-12-18 astro-ph.IM

Morphological classification of radio sources for galaxy evolution and cosmology with SKA-MID

classification astro-ph.IM
keywords evolutiongalaxymorphologiesradiosourcescontinuumcosmologydifferent
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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Morphologically classifying radio sources in continuum images with the SKA has the potential to address some of the key questions in cosmology and galaxy evolution. In particular, we may use different classes of radio sources as independent tracers of the dark-matter density field, and thus overcome cosmic variance in measuring large-scale structure, while on the galaxy evolution side we could measure the mechanical feedback from FRII and FRI jets. This work makes use of a \texttt{MeqTrees}-based simulations framework to forecast the ability of the SKA to recover true source morphologies at high redshifts. A suite of high resolution images containing realistic continuum source distributions with different morphologies (FRI, FRII, starburst galaxies) is fed through an SKA Phase 1 simulator, then analysed to determine the sensitivity limits at which the morphologies can still be distinguished. We also explore how changing the antenna distribution affects these results.

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