Near-infrared observations of submillijansky radio sources - Evidence for a population of starburst galaxies at intermediate redshifts

Astronomy and Astrophysics – Astronomy

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Astronomical Spectroscopy, Galactic Evolution, Near Infrared Radiation, Radio Sources (Astronomy), Red Shift, Star Formation, Astronomical Models, Color-Magnitude Diagram, Very Large Array (Vla), Visible Spectrum

Scientific paper

The authors present near-infrared JHK photometry for 32 sub-mJy radio sources discovered in a deep 20 cm VLA survey field centered on α(1950) = 08h52m15s and δ(1950) = 17°16arcmin. Combining these measurements with optical photometry and spectral evolution models, the authors conclude that the sources responsible for the upturn in the radio source counts at sub-mJy levels represent a large starburst galaxy population with -23 ⪉ Mv ⪉ -20 and with redshifts between ≡0.05 and ≡0.6.

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