23 citations · 124 across the 14 of their papers we have counts for
13 papers · 1 filter
Exploring the effect of different cosmologies on the Epoch of Reionization 21-cm signal with POLAR
Anshuman Acharya, Qing-bo Ma, Sambit K. Giri +8
A detection of the 21-cm signal power spectrum from the Epoch of Reionization is imminent, thanks to consistent advancements from telescopes such as LOFAR, MWA, and HERA, along wit…
Inferring IGM parameters from the redshifted 21-cm Power Spectrum using Artificial Neural Networks
Madhurima Choudhury, Raghunath Ghara, Saleem Zaroubi +8
The high redshift 21-cm signal promises to be a crucial probe of the state of the intergalactic medium (IGM). Understanding the connection between the observed 21-cm power spectrum…
Probing the intergalactic medium during the Epoch of Reionization using 21-cm signal power spectra
Raghunath Ghara, Abinash Kumar Shaw, Saleem Zaroubi +9
The redshifted 21-cm signal from the epoch of reionization (EoR) directly probes the ionization and thermal states of the intergalactic medium during that period. In particular, th…
21-cm Signal from the Epoch of Reionization: A Machine Learning upgrade to Foreground Removal with Gaussian Process Regression
Anshuman Acharya, Florent Mertens, Benedetta Ciardi +7
In recent years, a Gaussian Process Regression (GPR) based framework has been developed for foreground mitigation from data collected by the LOw-Frequency ARray (LOFAR), to measure…
Cosmic variance suppression in radiation-hydrodynamic modeling of the reionization-era 21-cm signal
Anshuman Acharya, Enrico Garaldi, Benedetta Ciardi +1
The 21-cm line emitted by neutral hydrogen is the most promising probe of the Epoch of Reionization (EoR). Multiple radio interferometric instruments are on the cusp of detecting i…
Skew spectrum and smoothed skewness of 21-cm signals from epoch of reionization
Qing-Bo Ma, Ling Peng
Due to the non-linear ionizing and heating processes, the 21-cm signals from epoch of reionization (EoR) are expected to have strong non-Gaussian fluctuations. In this paper, we us…
POLAR -- I: linking the 21-cm signal from the epoch of reionization to galaxy formation
Qing-Bo Ma, Raghunath Ghara, Benedetta Ciardi +5
To self-consistently model galactic properties, reionization of the intergalactic medium, and the associated 21-cm signal, we have developed the algorithm polar by integrating the…
A CRASH simulation of the contribution of binary stars to the epoch of reionization
Qing-Bo Ma, Silvia Fiaschi, Benedetta Ciardi +2
We use a set of 3D radiative transfer simulations to study the effect that a large fraction of binary stars in galaxies during the epoch of reionization has on the physical propert…
Hint of a truncated primordial spectrum from the CMB large-scale anomalies
Fulvio Melia, Qingbo Ma, Jun-Jie Wei +1
Several satellite missions have uncovered a series of potential anomalies in the fluctuation spectrum of the cosmic microwave background temperature, including: (1) an unexpectedly…
Investigating X-ray sources during the epoch of reionization with the 21 cm signal
Qing-Bo Ma, Benedetta Ciardi, Marius B. Eide +3
Heating of neutral gas by energetic sources is crucial for the prediction of the 21 cm signal during the epoch of reionization (EoR). To investigate differences induced on statisti…
Probing the high-z IGM with the hyperfine transition of He
Shivan Khullar, Qingbo Ma, Philipp Busch +3
The hyperfine transition of He at 3.5cm has been thought as a probe of the high-z IGM since it offers a unique insight into the evolution of the helium component of the gas…
Observing the redshifted 21 cm signal around a bright QSO at
Qing-Bo Ma, Benedetta Ciardi, Koki Kakiichi +3
We use hydrodynamics and radiative transfer simulations to study the 21~cm signal around a bright QSO at . Due to its powerful UV and X-ray radiation, the QSO quickly in…
X-ray background and its correlation with the 21 cm signal
Q. Ma, B. Ciardi, M. B. Eide +1
We use high resolution hydrodynamical simulations to study the contribution to the X-ray background from high- energetic sources, such as X-ray binaries, accreting nuclear black…