385 citations · 1.8k across the 31 of their papers we have counts for
31 papers
Beyond ΛCDM with the SKA Observatory -- I: Probing Gravity on Cosmological Scales
S. Camera, C. Addis, S. L. Guedezounme +26
General relativity (GR) is currently the best description of the gravitational interaction at our disposal and is one of the foundations of the concordance cosmological model. For…
Multi-tracer power spectra and bispectra: Formalism
Dionysios Karagiannis, Roy Maartens, José Fonseca +2
The power spectrum and bispectrum of dark matter tracers are key and complementary probes of the Universe. Next-generation surveys will deliver good measurements of the bispectrum,…
The observed number counts in luminosity distance space
José Fonseca, Stefano Zazzera, Tessa Baker +1
Next generation surveys will provide us with an unprecedented number of detections of supernovae Type Ia and gravitational wave merger events. Cross-correlations of such objects of…
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…
Multi-wavelength spectroscopic probes: biases from neglecting light-cone effects
Jan-Albert Viljoen, José Fonseca, Roy Maartens
Next-generation cosmological surveys will observe larger cosmic volumes than ever before, enabling us to access information on the primordial Universe, as well as on relativistic e…
Multi-wavelength spectroscopic probes: prospects for primordial non-Gaussianity and relativistic effects
Jan-Albert Viljoen, José Fonseca, Roy Maartens
Next-generation cosmological surveys will observe larger cosmic volumes than ever before, enabling us to access information on the primordial Universe, as well as on relativistic e…
Magnification and evolution biases in large-scale structure surveys
Roy Maartens, José Fonseca, Stefano Camera +3
Measurements of galaxy clustering in upcoming surveys such as those planned for the Euclid and Roman satellites, and the SKA Observatory, will be sensitive to distortions from lens…
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…
Anti-symmetric clustering signals in the observed power spectrum
José Fonseca, Chris Clarkson
In this paper, we study how to directly measure the effect of peculiar velocities in the observed angular power spectra. We do this by constructing a new anti-symmetric estimator o…
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…
Measuring ultra-large scale effects in the presence of 21cm intensity mapping foregrounds
José Fonseca, Michele Liguori
\textsc{Hi} intensity mapping will provide maps of the large-scale distribution of neutral hydrogen (\textsc{Hi}) in the universe. These are prime candidates to be used to constrai…
Probing primordial non-Gaussianity with the power spectrum and bispectrum of future 21cm intensity maps
Dionysios Karagiannis, José Fonseca, Roy Maartens +1
After reionisation, the 21cm emission line of neutral hydrogen within galaxies provides a tracer of dark matter. Next-generation intensity mapping surveys, with the SKA and other r…
Constraining the growth rate by combining multiple future surveys
Jan-Albert Viljoen, José Fonseca, Roy Maartens
The growth rate of large-scale structure provides a powerful consistency test of the standard cosmological model and a probe of possible deviations from general relativity. We use…
High-redshift cosmology with oxygen lines from H surveys
José Fonseca, Stefano Camera
A new generation of cosmological experiments will spectroscopically detect the H line from ELGs at optical/near-infrared frequencies. Other emission lines will also be present,…
Non-Gaussianity Constraints using Future Radio Continuum Surveys and the Multi-Tracer Technique
Zahra Gomes, Stefano Camera, Matt J. Jarvis +2
Tighter constraints on measurements of primordial non-Gaussianity will allow the differentiation of inflationary scenarios. The cosmic microwave background bispectrum-the standard…
Line intensity mapping: a "novel" window to the cosmic web
José Fonseca
Intensity mapping has been attracting increasing interest as a way to study galaxy evolution and the large scale structure of the Universe. Instead of detecting individual galaxies…
Constraints on the growth rate using the observed galaxy power spectrum
José Fonseca, Jan-Albert Viljoen, Roy Maartens
The large-scale structure growth index provides a consistency test of the standard cosmology and is a potential indicator of modified gravity. We investigate the constraints on…
Cosmology with Phase 1 of the Square Kilometre Array; Red Book 2018: Technical specifications and performance forecasts
Square Kilometre Array Cosmology Science Working Group, David J. Bacon, Richard A. Battye +44
We present a detailed overview of the cosmological surveys that will be carried out with Phase 1 of the Square Kilometre Array (SKA1), and the science that they will enable. We hig…
Fundamental Physics with the Square Kilometre Array
A. Weltman, P. Bull, S. Camera +50
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 an…
Optimised angular power spectra for spectroscopic galaxy surveys
Stefano Camera, José Fonseca, Roy Maartens +1
The angular power spectrum is a gauge-independent observable that is in principle the natural tool for analysing galaxy number counts. In practice, the problem is that the computat…
Synergies between intensity maps of hydrogen lines
José Fonseca, Roy Maartens, Mário G. Santos
We study synergies between HI 21cm and H intensity map observations, focusing on SKA1-like and SPHEREx-like surveys. We forecast how well such a combination can measure features…
Line-Intensity Mapping: 2017 Status Report
Ely D. Kovetz, Marco P. Viero, Adam Lidz +45
Following the first two annual intensity mapping workshops at Stanford in March 2016 and Johns Hopkins in June 2017, we report on the recent advances in theory, instrumentation and…
MeerKLASS: MeerKAT Large Area Synoptic Survey
Mario G. Santos, Michelle Cluver, Matt Hilton +35
We discuss the ground-breaking science that will be possible with a wide area survey, using the MeerKAT telescope, known as MeerKLASS (MeerKAT Large Area Synoptic Survey). The curr…
zBEAMS: A unified solution for supernova cosmology with redshift uncertainties
Ethan Roberts, Michelle Lochner, José Fonseca +3
Supernova cosmology without spectra will be an important component of future surveys such as LSST. This lack of supernova spectra results in uncertainty in the redshifts which, if…