Search Results for author: Garrelt Mellema

Found 3 papers, 2 papers with code

Redshifted 21-cm bispectrum II: Impact of the spin temperature fluctuations and redshift space distortions on the signal from the Cosmic Dawn

no code implementations21 Dec 2020 Mohd Kamran, Raghunath Ghara, Suman Majumdar, Rajesh Mondal, Garrelt Mellema, Somnath Bharadwaj, Jonathan R. Pritchard, Ilian T. Iliev

We find that $T_{\rm S}$ fluctuations have maximum impact on the bispectra magnitude for small $k$-triangles and at the stage when Ly$\alpha$ coupling reaches saturation.

Cosmology and Nongalactic Astrophysics

Prediction of the 21-cm signal from reionization: comparison between 3D and 1D radiative transfer schemes

1 code implementation25 Oct 2017 Raghunath Ghara, Garrelt Mellema, Sambit K. Giri, T. Roy Choudhury, Kanan K. Datta, Suman Majumdar

Three-dimensional radiative transfer simulations of the epoch of reionization can produce realistic results, but are computationally expensive.

Cosmology and Nongalactic Astrophysics

On the use of semi-numerical simulations in predicting the 21-cm signal from the epoch of reionization

1 code implementation4 Mar 2014 Suman Majumdar, Garrelt Mellema, Kanan K. Datta, Hannes Jensen, T. Roy Choudhury, Somnath Bharadwaj, Martina M. Friedrich

Radiative transfer codes can produce realistic results, but are computationally expensive.

Cosmology and Nongalactic Astrophysics

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