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LOFAR/H-ATLAS: A deep low-frequency survey of the Herschel-ATLAS North Galactic Pole field
M. J. Hardcastle, G. Gürkan, R. J. van Weeren +25
We present LOFAR High-Band Array (HBA) observations of the Herschel-ATLAS North Galactic Pole survey area. The survey we have carried out, consisting of four pointings covering aro…
LOFAR VLBI Studies at 55 MHz of 4C 43.15, a z=2.4 Radio Galaxy
Leah K. Morabito, Adam T. Deller, Huub Röttgering +8
The correlation between radio spectral index and redshift has been exploited to discover high redshift radio galaxies, but its underlying cause is unclear. It is crucial to charact…
A large light-mass component of cosmic rays at 10^{17} - 10^{17.5} eV from radio observations
S. Buitink, A. Corstanje, H. Falcke +101
Cosmic rays are the highest energy particles found in nature. Measurements of the mass composition of cosmic rays between 10^{17} eV and 10^{18} eV are essential to understand whet…
A plethora of diffuse steep spectrum radio sources in Abell 2034 revealed by LOFAR
T. W. Shimwell, J. Luckin, M. Brüggen +28
With Low-Frequency Array (LOFAR) observations, we have discovered a diverse assembly of steep spectrum emission that is apparently associated with the intra cluster medium (ICM) of…
Frontier Fields Clusters: Deep Chandra Observations of the Complex Merger MACS J1149.6+2223
G. A. Ogrean, R. J. van Weeren, C. Jones +24
The HST Frontier Fields cluster MACS J1149.6+2223 is one of the most complex merging clusters, believed to consist of four dark matter halos. We present results from deep (365 ks)…
Chandra Observation of Abell 1142: A Cool-Core Cluster Lacking a Central Brightest Cluster Galaxy?
Yuanyuan Su, David A. Buote, Fabio Gastaldello +1
Abell~1142 is a low-mass galaxy cluster at low redshift containing two comparable Brightest Cluster Galaxies (BCG) resembling a scaled-down version of the Coma Cluster. Our Chandra…