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GOODS-Herschel: radio-excess signature of hidden AGN activity in distant star-forming galaxies
A. Del Moro, D. M. Alexander, J. R. Mullaney +23
We present here a new spectral energy distribution (SED) fitting approach that we adopt to select radio-excess sources amongst distant star-forming galaxies in the GOODS-Herschel (…
The optically unbiased GRB host (TOUGH) survey. VI. Radio observations at z<1 and consistency with typical star-forming galaxies
Michał J. Michałowski, A. Kamble, J. Hjorth +19
The objective of this paper is to determine the level of obscured star formation activity and dust attenuation in a sample of gamma-ray burst (GRB) hosts; and to test the hypothesi…
A new perspective on the submillimetre galaxy MM 18423+5938 at redshift 3.9296 from radio continuum imaging
J. P. McKean, A. Berciano Alba, F. Volino +5
The bright submillimetre (sub-mm) galaxy MM 18423+5938 at redshift 3.9296 has been predicted from mid-infrared and millimetre photometry to have an exceptionally large total infrar…
Hanny's Voorwerp: a nuclear starburst in IC2497
M. A. Garrett, H. Rampadarath, G. I. G. Jozsa +7
We present high and intermediate resolution radio observations of the central region in the spiral galaxy IC 2497, performed using the European VLBI Network (EVN) at 18 cm, and the…
New Global VLBI observations of the gravitational lensing system MG J0414+0534
F. Volino, O. Wucknitz, R. W. Porcas +9
The gravitational lens system MG J0414+0534 is formed by an elliptical galaxy at redshift ~0.96 and a quasar at z~2.64. The system geometry is typical of lensing by an elliptical g…
The Sudden Death of the Nearest Quasar
Kevin Schawinski, Daniel A. Evans, Shanil Virani +13
Galaxy formation is significantly modulated by energy output from supermassive black holes at the centers of galaxies which grow in highly efficient luminous quasar phases. The tim…
Very Large Array observations of the 8 o'clock arc lens system: Radio emission and a limit on the star-formation rate
Filomena Volino, Olaf Wucknitz, John P. McKean +1
The 8 o'clock arc is a gravitationally lensed Lyman Break Galaxy (LBG) at redshift z=2.73 that has a star-formation rate (SFR) of 270 solar-mass/year (derived from optical and near…
Radio counterpart of the lensed sub-mm emission in the cluster MS0451.6-0305: new evidence for the merger scenario
A. Berciano Alba, L. V. E. Koopmans, M. A. Garrett +2
SMM J04542-0301 is an extended (~1 arcmin) sub-mm source located near the core of the cluster MS0451.6-0305. It has been suggested that part of its emission arises from the interac…
Is an obscured AGN at the centre of the disk galaxy IC 2497 responsible for Hanny's Voorwerp?
H. Rampadarath, M. A. Garrett, T. Muxlow +3
We present the results of VLBI and MERLIN observations of the massive disk galaxy IC 2497. Optical observations of IC 2497 revealed the existence of a giant emission nebula "Hanny'…
Revealing Hanny's Voorwerp: radio observations of IC 2497
G. I. G. Jozsa, M. A. Garrett, T. A. Oosterloo +7
We present multi-wavelength radio observations in the direction of the spiral galaxy IC 2497 and the neighbouring emission nebula known as "Hanny's Voorwerp". Our WSRT continuum ob…
Observations of 44 extragalactic radio sources with the VLBA at 92cm: A List of Potential Calibrators and Targets for LOFAR and RadioAstron
H. Rampadarath, M. A. Garrett, A. Polatidis
Aims. We have analysed VLBA 92cm archive data of 44 extragalactic sources in order to identify early targets and potential calibrator sources for the LOFAR radio telescope and the…
Lofar, E-Lofar and Low-Frequency Vlbi
M. A. Garrett, H. Rampadarath, E. Lenc +1
The Low Frequency Array (LOFAR) is a new generation of electronic radio telescope based on aperture array technology. The telescope is being developed by ASTRON, and currently bein…