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Geach, J. E; More, A; Verma, A; Marshall, P. J; Jackson, N; Belles, P.-E; Beswick, R; Baeten, E; Chavez, M; Cornen, C; Cox, B. E; Erben, T; Erickson, N. J; Garrington, S; Harrison, P. A; Harrington, K; Hughes, D. H; Ivison, R. J; Jordan, C; Lin, Y.-T; Leauthaud, A; Lintott, C; Lynn, S; Kapadia, A; Kneib, J.-P; Macmillan, C; Makler, M; Miller, G; Montaña, A; Mujica, R; Muxlow, T; Narayanan, G; Briain, D. Ó; O'Brien, T; Oguri, M; Paget, E; Parrish, M; Ross, N. P; Rozo, E; Rusu, C. E; Rykoff, E. S; Sanchez-Argüelles, D; Simpson, R; Snyder, C; Schloerb, F. P; Tecza, M; Wang, W-H; Van Waerbeke, L; Wilcox, J; Viero, M; Wilson, G. W; Yun, M. S; Zeballos, M
Monthly notices of the Royal Astronomical Society, 09/2015, Letnik: 452, Številka: 1Journal Article
We report the discovery of a gravitationally lensed hyperluminous infrared galaxy (intrinsic L IR ≈ 1013 L⊙) with strong radio emission (intrinsic L 1.4 GHz ≈ 1025 W Hz−1) at z = 2.553. The source was identified in the citizen science project Space Warps through the visual inspection of tens of thousands of iJK s colour composite images of luminous red galaxies (LRGs), groups and clusters of galaxies and quasars. Appearing as a partial Einstein ring (r e ≈ 3 arcsec) around an LRG at z = 0.2, the galaxy is extremely bright in the sub-millimetre for a cosmological source, with the thermal dust emission approaching 1 Jy at peak. The redshift of the lensed galaxy is determined through the detection of the CO(3→2) molecular emission line with the Large Millimetre Telescope's Redshift Search Receiver and through O iii and Hα line detections in the near-infrared from Subaru/Infrared Camera and Spectrograph. We have resolved the radio emission with high-resolution (300–400 mas) eMERLIN L-band and Very Large Array C-band imaging. These observations are used in combination with the near-infrared imaging to construct a lens model, which indicates a lensing magnification of μ ≈ 10. The source reconstruction appears to support a radio morphology comprised of a compact (<250 pc) core and more extended component, perhaps indicative of an active nucleus and jet or lobe.
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