106 citations · 503 across the 25 of their papers we have counts for
25 papers
meer21cm: an Analysis Pipeline and Comprehensive Toolkit for HI Intensity Mapping
Zhaoting Chen, Steven Cunnington, Daniel Tassie +23
We present meer21cm, a comprehensive python package for cosmological data analysis of single-dish HI intensity mapping surveys. This package is simple to use, with a modularised co…
Synchrotron and free-free mapping with simulated REACH observations between 50-170 MHz
Daniel Robins, Dominic Anstey, Harry Bevins +2
Global 21cm experiments aim to detect the hydrogen 21cm signal by separating it from foreground emission that can be orders of magnitude brighter than the signal. REACH (the Radio…
Methodological Frontiers in 21-cm Intensity Mapping: the Treatment of Systematics and Foreground Contamination
Marta Spinelli, Matilde Barberi-Squarotti, José Luis Bernal +29
The distribution of neutral hydrogen (HI) in the post-reionization universe traces the cosmic large-scale structure and therefore serves as a powerful cosmological probe. An effici…
Probing Anomalous Microwave Emission with the Square Kilometre Array
Matías Vidal, Simón Casassus, Roke Cepeda-Arroita +15
Anomalous microwave emission (AME) represents an excess of radiation in the 10-60 GHz range, distinct from synchrotron, free-free, or thermal dust emission. Although most commonly…
Single-dish HI Intensity Mapping with the SKAO: Precursor Progress with MeerKAT's Large Area Synoptic Survey (MeerKLASS)
Steven Cunnington, Jingying Wang, Mario G. Santos +16
Using the SKAO to map the intensity of neutral hydrogen's 21cm emission line will be a golden opportunity to constrain models of cosmology. To access the largest cosmological scale…
All-sky modeling of Galactic emission at radio and microwave frequencies
Gabriel A. Hoerning, Clive Dickinson, Stuart E. Harper +13
We present a new all-sky model of low-frequency diffuse Galactic emission in the regime where synchrotron, free-free, and spinning dust dominate. The model extends the Planck 2015…
Measuring the diffuse Galactic synchrotron spectral index and curvature between 45 and 2300 MHz
Melis O. Irfan, Giuseppe Puglisi
We present an all-sky map of the synchrotron spectral index and curvature between 45 and 2300 MHz at a resolution of 1 degree calculated from a combination of numerous partial sky…
Emission-line Stacking of 21cm Intensity Maps with MeerKLASS: Inference Pipeline and Application to the L-band Deep-field Data
Zhaoting Chen, Steven Cunnington, Alkistis Pourtsidou +11
We present a novel analysis of observational systematics through the emission-line stacking of the MeerKLASS L-band deep-field intensity maps, following the detection in arXiv:2407…
Hydrogen intensity mapping with MeerKAT: Preserving cosmological signal by optimising contaminant separation
Isabella P. Carucci, José L. Bernal, Steven Cunnington +9
Removing contaminants is a delicate, yet crucial step in neutral hydrogen (HI) intensity mapping and often considered the technique's greatest challenge. Here, we address this chal…
Bayesian evidence for flux scale errors in Galactic synchrotron maps
Michael J. Wilensky, Melis O. Irfan, Philip Bull
The 408 MHz Haslam map is widely used as a low-frequency anchor for the intensity and morphology of Galactic synchrotron emission. Multi-frequency, multi-experiment fits show evide…
MeerKLASS L-band deep-field intensity maps: entering the HI dominated regime
MeerKLASS Collaboration, Matilde Barberi-Squarotti, José L. Bernal +18
We present results from MeerKAT single-dish HI intensity maps, the final observations to be performed in L-band in the MeerKAT Large Area Synoptic Survey (MeerKLASS) campaign. The…
Radio Frequency Interference from Radio Navigation Satellite Systems: simulations and comparison to MeerKAT single-dish data
Brandon Engelbrecht, Mario G. Santos, José Fonseca +11
Radio Frequency Interference (RFI) is emitted from various sources, terrestrial or orbital, and create a nuisance for ground-based 21cm experiments. In particular, single-dish 21cm…
Simulating a full-sky high resolution Galactic synchrotron spectral index map using neural networks
M. O. Irfan
We present a model for the full-sky diffuse Galactic synchrotron spectral index with an appropriate level of spatial structure for a resolution of 56 arcmin (to match the resolutio…
The foreground transfer function for HI intensity mapping signal reconstruction: MeerKLASS and precision cosmology applications
Steven Cunnington, Laura Wolz, Philip Bull +8
Blind cleaning methods are currently the preferred strategy for handling foreground contamination in single-dish HI intensity mapping surveys. Despite the increasing sophistication…
Mitigating the effect of 1/f noise on the detection of the HI intensity mapping power spectrum from single-dish measurements
Melis O. Irfan, Yichao Li, Mario G. Santos +5
We present and compare several methods to mitigate time-correlated (1/f) noise within the HI intensity mapping component of the MeerKAT Large Area Synoptic Survey (MeerKLASS). By s…
HI intensity mapping with MeerKAT: power spectrum detection in cross-correlation with WiggleZ galaxies
Steven Cunnington, Yichao Li, Mario G. Santos +13
We present a detection of correlated clustering between MeerKAT radio intensity maps and galaxies from the WiggleZ Dark Energy Survey. We find a detection of the cross-corre…
Measurements of the diffuse Galactic synchrotron spectral index and curvature from MeerKLASS pilot data
Melis O. Irfan, Philip Bull, Mario G. Santos +6
21cm intensity mapping experiments are bringing an influx of high spectral resolution observational data in the MHz GHz regime. We use pilot MHz data fro…
SKAO HI Intensity Mapping: Blind Foreground Subtraction Challenge
Marta Spinelli, Isabella P. Carucci, Steven Cunnington +5
Neutral Hydrogen Intensity Mapping (HI IM) surveys will be a powerful new probe of cosmology. However, strong astrophysical foregrounds contaminate the signal and their coupling wi…
Cleaning foregrounds from single-dish 21cm intensity maps with Kernel Principal Component Analysis
Melis O. Irfan, Philip Bull
The high dynamic range between contaminating foreground emission and the fluctuating 21cm brightness temperature field is one of the most problematic characteristics of 21cm intens…
HI intensity mapping with MeerKAT: Calibration pipeline for multi-dish autocorrelation observations
Jingying Wang, Mario G. Santos, Philip Bull +10
While most purpose-built 21cm intensity mapping experiments are close-packed interferometer arrays, general-purpose dish arrays should also be capable of measuring the cosmological…
21cm foregrounds and polarization leakage: a user's guide on cleaning and mitigation strategies
Steven Cunnington, Melis O. Irfan, Isabella P. Carucci +2
The success of HI intensity mapping is largely dependent on how well 21cm foreground contamination can be controlled. In order to progress our understanding further, we present a r…
Recovery of 21 cm intensity maps with sparse component separation
Isabella P. Carucci, Melis O. Irfan, Jérôme Bobin
21 cm intensity mapping has emerged as a promising technique to map the large-scale structure of the Universe. However, the presence of foregrounds with amplitudes orders of magnit…
Determining thermal dust emission from Planck HFI data using a sparse, parametric technique
Melis O. Irfan, Jérôme Bobin, Marc-Antoine Miville-Deschênes +1
Context: The Planck data releases have provided the community with sub-millimetre and radio observations of the full-sky at unprecedented resolutions. We make use of the Planck 353…
Sparse estimation of model-based diffuse thermal dust emission
Melis Irfan, Jerome Bobin
Component separation for the Planck HFI data is primarily concerned with the estimation of thermal dust emission, which requires the separation of thermal dust from the cosmic infr…