activity
20092025
most citedWide-field LOFAR imaging of the field around the double-double radio galaxy B1834+620: A fresh view on a restarted AGN and doubeltjes

35 citations · 105 across the 6 of their papers we have counts for

collaborators

7 papers

astro-ph.CO2025★ 14 cited

Constraints on the state of the IGM at using redshifted 21-cm observations with LOFAR

R. Ghara, S. Zaroubi, B. Ciardi +21

The power spectra of the redshifted 21-cm signal from the Epoch of Reionization (EoR) contain information about the ionization and thermal states of the intergalactic medium (IGM),…

astro-ph.CO2025★ 7 cited

First upper limits on the 21-cm signal power spectrum of neutral hydrogen at from the LOFAR 3C196 field

E. Ceccotti, A. R. Offringa, F. G. Mertens +16

The redshifted 21-cm signal of neutral hydrogen from the Epoch of Reionization (EoR) can potentially be detected using low-frequency radio instruments such as the Low-Frequency Arr…

astro-ph.CO2025★ 27 cited

Deeper multi-redshift upper limits on the Epoch of Reionization 21-cm signal power spectrum from LOFAR between z=8.3 and z=10.1

F. G. Mertens, M. Mevius, L. V. E. Koopmans +20

We present new upper limits on the 21-cm signal power spectrum from the Epoch of Reionization (EoR), at redshifts , based on reprocessed obse…

astro-ph.CO2023★ 12 cited

Transient RFI environment of LOFAR-LBA at 72-75 MHz: Impact on ultra-widefield AARTFAAC Cosmic Explorer observations of the redshifted 21-cm signal

B. K. Gehlot, L. V. E. Koopmans, S. A. Brackenhoff +13

Measurement of the redshifted 21-cm signal of neutral hydrogen from the Cosmic Dawn (CD) and Epoch of Reionisation (EoR) promises to unveil a wealth of information about the astrop…

astro-ph.GA2015★ 35 cited

Wide-field LOFAR imaging of the field around the double-double radio galaxy B1834+620: A fresh view on a restarted AGN and doubeltjes

E. Orrú, S. van Velzen, R. F. Pizzo +8

The existence of double-double radio galaxies (DDRGs) is evidence for recurrent jet activity in AGN, as expected from standard accretion models. A detailed study of these rare sour…

astro-ph.SR2015

LOFAR discovery of a quiet emission mode in PSR B0823+26

C. Sobey, N. J. Young, J. W. T. Hessels +91

PSR B0823+26, a 0.53-s radio pulsar, displays a host of emission phenomena over timescales of seconds to (at least) hours, including nulling, subpulse drifting, and mode-changing.…