no code implementations • 22 Feb 2021 • Steven Cunnington, Catherine Watkinson, Alkistis Pourtsidou
We present a model of the redshift space HI IM bispectrum including observational effects from the radio telescope beam and 21cm foreground contamination.
Cosmology and Nongalactic Astrophysics
no code implementations • 9 Feb 2021 • Laura Wolz, Alkistis Pourtsidou, Kiyoshi W. Masui, Tzu-Ching Chang, Julian E. Bautista, Eva-Maria Mueller, Santiago Avila, David Bacon, Will J. Percival, Steven Cunnington, Chris Anderson, Xuelei Chen, Jean-Paul Kneib, Yi-Chao Li, Yu-Wei Liao, Ue-Li Pen, Jeffrey B. Peterson, Graziano Rossi, Donald P. Schneider, Jaswant Yadav, Gong-Bo Zhao
We present the joint analysis of Neutral Hydrogen (HI) Intensity Mapping observations with three galaxy samples: the Luminous Red Galaxy (LRG) and Emission Line Galaxy (ELG) samples from the eBOSS survey, and the WiggleZ Dark Energy Survey sample.
Cosmology and Nongalactic Astrophysics
1 code implementation • 13 Feb 2020 • Steven Cunnington, Alkistis Pourtsidou, Paula S. Soares, Chris Blake, David Bacon
We include simulations of the cosmological HI signal using N-body and log-normal methods, foregrounds and their removal, as well as instrumental effects.
Cosmology and Nongalactic Astrophysics
1 code implementation • 11 Nov 2019 • Benjamin Bose, Hans A. Winther, Alkistis Pourtsidou, Santiago Casas, Lucas Lombriser, Qianli Xia, Matteo Cataneo
We test this approach against comoving Lagrangian acceleration simulation measurements performed in GR, DGP and $f(R)$ gravity and find that our method performs comparably or better to the dark matter TNS redshift space power spectrum model for dark matter.
Cosmology and Nongalactic Astrophysics
no code implementations • 11 May 2018 • Steven Cunnington, Ian Harrison, Alkistis Pourtsidou, David Bacon
We utilise the S3-SAX catalogue which includes HI emission information for each galaxy, which we use to construct HI intensity maps.
Cosmology and Nongalactic Astrophysics
