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Paper: The Radio and Optical Morphologies of Micro-Jansky Radio Sources
Volume: 300, Radio Astronomy at the Fringe
Page: 259
Authors: Fomalont, E.B.; Kellermann, K.I.; Cowie, L.L.; Berger, A.J.; Capak, P.; Partridge, R.B.; Windhorst, R.A.
Abstract: We have imaged a 17′ region in the SSA13 field with the VLA at 1.4 GHz with a resolution of 1.8″, and obtained sensitive Subaru images at R-band (0.9 μm) and Z-band (1.3 μm) with a seeing of 1.1″. There are 548 radio sources detected with an image flux density > 27.5 μJy, and over 95% are identified on the Z-band image, to a limiting magnitude of 25.8 mag. The average radio angular size is 1.35″ and very few sources are larger than 5″. The differential count of radio sources has a slope of −2.3. The radio spectral index steepens considerably for the weaker sources with flux density < 100 μJy at 1.4 GHz. Many radio and optical morphologies have similar orientations, suggesting that the emission is associated with the star formation process.
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