550 citations · 2.5k across the 71 of their papers we have counts for
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Degree-Scale Galactic Radio Emission at 122 MHz around the North Celestial Pole with LOFAR-AARTFAAC
B. K. Gehlot, L. V. E. Koopmans, A. R. Offringa +11
Aims: Contamination from bright diffuse Galactic thermal and non-thermal radio emission poses crucial challenges in experiments aiming to measure the 21-cm signal of neutral hydrog…
A numerical study of 21-cm signal suppression and noise increase in direction-dependent calibration of LOFAR data
M. Mevius, F. Mertens, L. V. E. Koopmans +14
We investigate systematic effects in direction dependent gain calibration in the context of the Low-Frequency Array (LOFAR) 21-cm Epoch of Reionization (EoR) experiment. The LOFAR…
The large-scale 21-cm power spectrum from reionization
Ivelin Georgiev, Garrelt Mellema, Sambit K. Giri +1
Radio interferometers, such as the Low-Frequency Array and the future Square Kilometre Array, are attempting to measure the spherically averaged 21-cm power spectrum from the Epoch…
Constraining baryonic feedback and cosmology with weak-lensing, X-ray, and kinematic Sunyaev-Zeldovich observations
Aurel Schneider, Sambit K. Giri, Stefania Amodeo +1
Modern weak-lensing observations are becoming increasingly sensitive to baryonic feedback processes which are still poorly understood. So far, this challenge has been faced either…
Emulation of baryonic effects on the matter power spectrum and constraints from galaxy cluster data
Sambit K. Giri, Aurel Schneider
Baryonic feedback effects consist of a major systematic for upcoming weak-lensing and galaxy-clustering surveys. In this paper, we present an emulator for the baryonic suppression…
Mixed dark matter: matter power spectrum and halo mass function
G. Parimbelli, G. Scelfo, S. K. Giri +4
We investigate and quantify the impact of mixed (cold and warm) dark matter models on large-scale structure observables. In this scenario, dark matter comes in two phases, a cold o…
Decaying Dark Matter: Simulations and Weak-Lensing Forecast
Jonathan Hubert, Aurel Schneider, Doug Potter +2
Despite evidence for the existence of dark matter (DM) from very high and low redshifts, a moderate amount of DM particle decay remains a valid possibility. This includes both mode…
Constraining the state of the intergalactic medium during the Epoch of Reionization using MWA 21-cm signal observations
Raghunath Ghara, Sambit K. Giri, Benedetta Ciardi +2
The Murchison Widefield Array (MWA) team has derived new upper limits on the spherically averaged power spectrum of the 21-cm signal at six redshifts in the range $z \approx 6.5-8.…
Deep learning approach for identification of HII regions during reionization in 21-cm observations
Michele Bianco, Sambit. K. Giri, Ilian T. Iliev +1
The upcoming Square Kilometre Array (SKA-Low) will map the distribution of neutral hydrogen during reionization, and produce a tremendous amount of 3D tomographic data. These image…