Data analysis for precision 21 cm cosmology

A Liu, JR Shaw - Publications of the Astronomical Society of the …, 2020 - iopscience.iop.org
The redshifted 21 cm line is an emerging tool in cosmology, in principle permitting three-
dimensional surveys of our universe that reach unprecedentedly large volumes, previously …

Fundamental physics with the square kilometre array

A Weltman, P Bull, S Camera, K Kelley… - Publications of the …, 2020 - cambridge.org
The Square Kilometre Array (SKA) is a planned large radio interferometer designed to
operate over a wide range of frequencies, and with an order of magnitude greater sensitivity …

Upper limits on the 21 cm epoch of reionization power spectrum from one night with LOFAR

AH Patil, S Yatawatta, LVE Koopmans… - The Astrophysical …, 2017 - iopscience.iop.org
We present the first limits on the Epoch of Reionization 21 cm H i power spectra, in the
redshift range z= 7.9–10.6, using the Low-Frequency Array (LOFAR) High-Band Antenna …

Constraining the intergalactic medium at z ≈ 9.1 using LOFAR Epoch of Reionization observations

R Ghara, SK Giri, G Mellema, B Ciardi… - Monthly Notices of …, 2020 - academic.oup.com
We derive constraints on the thermal and ionization states of the intergalactic medium (IGM)
at redshift≈ 9.1 using new upper limits on the 21-cm power spectrum measured by the …

Constraining the state of the intergalactic medium during the Epoch of Reionization using MWA 21-cm signal observations

R Ghara, SK Giri, B Ciardi, G Mellema… - Monthly Notices of the …, 2021 - academic.oup.com
ABSTRACT 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≈ 6.5 …

Emulating simulations of cosmic dawn for 21 cm power spectrum constraints on cosmology, reionization, and x-ray heating

NS Kern, A Liu, AR Parsons, A Mesinger… - The Astrophysical …, 2017 - iopscience.iop.org
Current and upcoming radio interferometric experiments are aiming to make a statistical
characterization of the high-redshift 21 cm fluctuation signal spanning the hydrogen …

A machine learning based morphological classification of 14,245 radio agns selected from the best–heckman sample

Z Ma, H Xu, J Zhu, D Hu, W Li, C Shan… - The Astrophysical …, 2019 - iopscience.iop.org
We present a morphological classification of 14,245 radio active galactic nuclei (AGNs) into
six types, ie, typical Fanaroff–Riley Class I/II (FRI/II), FRI/II-like bent-tailed, X-shaped radio …

Spectral index of the diffuse radio background between 50 and 100 MHz

TJ Mozdzen, N Mahesh, RA Monsalve… - Monthly Notices of …, 2019 - academic.oup.com
We report the spectral index of diffuse radio emission between 50 and 100 MHz from data
collected with two implementations of the Experiment to Detect the Global EoR Signature …

CONCERTO: Extracting the power spectrum of the [CII] emission line

M Van Cuyck, N Ponthieu, G Lagache… - Astronomy & …, 2023 - aanda.org
Context. CONCERTO is the first experiment to perform a [C II] line intensity mapping (LIM)
survey on the COSMOS field to target z> 5.2. Measuring the [C II] angular power spectrum …

Inflation and early dark energy with a stage II hydrogen intensity mapping experiment

R Ansari, EJ Arena, K Bandura, P Bull… - arXiv preprint arXiv …, 2018 - arxiv.org
This white paper envisions a revolutionary post-DESI, post-LSST dark energy program
based on intensity mapping of the redshifted 21cm emission line from neutral hydrogen at …