654 citations · 12.9k across the 278 of their papers we have counts for
29 papers · 1 filter
Untangling cosmic magnetic fields: Faraday tomography at metre wavelengths with LOFAR
Shane P. O'Sullivan, M. Brüggen, C. L. Van Eck +7
The technique of Faraday tomography is a key tool for the study of magnetised plasmas in the new era of broadband radio polarisation observations. In particular, observations at me…
CHANG-ES XII: A LOFAR and VLA view of the edge-on star-forming galaxy NGC 3556
A. Miskolczi, V. Heesen, C. Horellou +11
Low-frequency radio continuum studies of star-forming edge-on galaxies can help to further understand how cosmic-ray electrons (CRe) propagate through the interstellar medium into…
Ultra-steep spectrum emission in the merging galaxy cluster Abell 1914
S. Mandal, H. T. Intema, T. W. Shimwell +14
A number of radio observations have revealed the presence of large synchrotron-emitting sources associated with the intra-cluster medium. There is strong observational evidence tha…
A LOFAR study of non-merging massive galaxy clusters
Federica Savini, Annalisa Bonafede, Marcus Brueggen +15
Centrally located diffuse radio emission has been observed in both merging and non-merging galaxy clusters. Depending on their morphology and size, we distinguish between giant rad…
Exploring the properties of low-frequency radio emission and magnetic fields in a sample of compact galaxy groups using the LOFAR Two-Metre Sky Survey (LoTSS)
B. Nikiel-Wroczyński, A. Berger, N. Herrera Ruiz +14
We use the LOFAR Two-metre Sky Survey (LoTSS) Data Release I to identify the groups of galaxies (and individual galaxies) from the Hickson Compact Groups and Magnitude Limited Comp…
Radio observations of the merging galaxy cluster Abell 520
D. N. Hoang, T. W. Shimwell, R. J. van Weeren +13
We examine the possible acceleration mechanisms of the relativistic particles responsible for the extended radio emission in Abell 520. We used new LOFAR 145 MHz, archival GMRT 323…
Characterizing the radio emission from the binary galaxy cluster merger Abell 2146
D. N. Hoang, T. W. Shimwell, R. J. van Weeren +8
Collisions of galaxy clusters generate shocks and turbulence in the intra-cluster medium (ICM). The presence of relativistic particles and magnetic fields is inferred through the d…
Radio-loud AGN in the first LoTSS data release: The lifetimes and environmental impact of jet-driven sources
M. J. Hardcastle, W. L. Williams, P. N. Best +20
We constructed a sample of 23,344 radio-loud active galactic nuclei (RLAGN) from the catalogue derived from the LOFAR Two-Metre Sky Survey (LoTSS) survey of the HETDEX Spring field…
LoTSS/HETDEX: Disentangling star formation and AGN activity in gravitationally-lensed radio-quiet quasars
H. R. Stacey, J. P. McKean, N. J. Jackson +15
Determining the star-forming properties of radio-quiet quasars is important for understanding the co-evolution of star formation and black hole accretion. Here, we present the dete…
The origin of radio emission in broad absorption line quasars: Results from the LOFAR Two-metre Sky Survey
L. K. Morabito, J. H. Matthews, P. N. Best +14
We present a study of the low-frequency radio properties of broad absorption line quasars (BALQSOs) from the LOFAR Two-metre Sky-Survey Data Release 1 (LDR1). The value-added LDR1…
The spectacular cluster chain Abell 781 as observed with LOFAR, GMRT, and XMM-Newton
A. Botteon, T. W. Shimwell, A. Bonafede +20
A number of merging galaxy clusters show the presence of large-scale radio emission associated with the intra-cluster medium (ICM). These synchrotron sources are generally classifi…
Evolutionary phases of merging clusters as seen by LOFAR
Amanda Wilber, Marcus Brüggen, Annalisa Bonafede +13
Massive, merging galaxy clusters often host giant, diffuse radio sources that arise from shocks and turbulence; hence, radio observations can be useful for determining the merger s…
The LOFAR Two-metre Sky Survey IV. First Data Release: Photometric redshifts and rest-frame magnitudes
Kenneth J Duncan, J. Sabater, H. J. A. Röttgering +24
The LOFAR Two-metre Sky Survey (LoTSS) is a sensitive, high-resolution 120-168 MHz survey of the Northern sky. The LoTSS First Data Release (DR1) presents 424 square degrees of rad…
The LOFAR Two-metre Sky Survey (LoTSS) III. First Data Release: optical/IR identifications and value-added catalogue
W. L. Williams, M. J. Hardcastle, P. N. Best +38
The LOFAR Two-metre Sky Survey (LoTSS) is an ongoing sensitive, high-resolution 120-168 MHz survey of the Northern sky with diverse and ambitious science goals. Many of the scienti…
The LOFAR Two-metre Sky Survey - II. First data release
T. W. Shimwell, C. Tasse, M. J. Hardcastle +104
The LOFAR Two-metre Sky Survey (LoTSS) is an ongoing sensitive, high-resolution 120-168MHz survey of the entire northern sky for which observations are now 20% complete. We present…
The LoTSS view of radio AGN in the local Universe. The most massive galaxies are always switched on
J. Sabater, P. N. Best, M. J. Hardcastle +18
This paper presents a study of the local radio source population, by cross-comparing the data from the first data release (DR1) of the LOFAR Two-Metre Sky Survey (LoTSS) with the S…
LOFAR discovery of a 23.5-second radio pulsar
C. M. Tan, C. G. Bassa, S. Cooper +16
We present the discovery of PSR J0250+5854, a radio pulsar with a spin period of 23.5 s. This is the slowest-spinning radio pulsar known. PSR J0250+5854 was discovered by the LOFAR…
Fast and Reproducible LOFAR Workflows with AGLOW
A. P. Mechev, J. B. R Oonk, T. Shimwell +3
The LOFAR radio telescope creates Petabytes of data per year. This data is important for many scientific projects. The data needs to be efficiently processed within the timespan of…
Deep Very Large Array observations of the merging cluster CIZA J2242.8+5301: continuum and spectral imaging
G. Di Gennaro, R. J. van Weeren, M. Hoeft +14
Despite progress in understanding radio relics, there are still open questions regarding the underlying particle acceleration mechanisms. In this paper we present deep 1--4 GHz VLA…
Deep LOFAR 150 MHz imaging of the Boötes field: Unveiling the faint low-frequency sky
E. Retana-Montenegro, H. J. A. Röttgering, T. W. Shimwell +5
We have conducted a deep survey (with a central rms of ) with the LOw Frequency ARray (LOFAR) at 120-168 MHz of the Boötes field, with an angular resolution of $3.9…
First evidence of diffuse ultra-steep-spectrum radio emission surrounding the cool core of a cluster
Federica Savini, Annalisa Bonafede, Marcus Brueggen +14
Diffuse synchrotron radio emission from cosmic-ray electrons is observed at the center of a number of galaxy clusters. These sources can be classified either as giant radio halos,…
LOFAR discovery of radio emission in MACSJ0717.53745
A. Bonafede, M. Brüggen, D. Rafferty +16
We present results from LOFAR and GMRT observations of the galaxy cluster MACSJ0717.53745. The cluster is undergoing a violent merger involving at least four sub-clusters, a…
Radio observations of the double-relic galaxy cluster Abell 1240
D. N. Hoang, T. W. Shimwell, R. J. van Weeren +16
We present LOFAR MHz images of the merging galaxy cluster Abell 1240 that hosts double radio relics. In combination with the GMRT MHz and VLA GHz data, we…
LOFAR discovery of a double radio halo system in Abell 1758 and radio/X-ray study of the cluster pair
A. Botteon, T. W. Shimwell, A. Bonafede +14
Radio halos and radio relics are diffuse synchrotron sources that extend over Mpc-scales and are found in a number of merger galaxy clusters. They are believed to form as a consequ…