Publications (109)
Modelling cross-correlations of ultra-high-energy cosmic rays and galaxies
Federico R. Urban, Stefano Camera, David Alonso
The astrophysical engines that power ultra-high-energy cosmic rays (UHECRs) remain to date unknown. Since the propagation horizon of UHECRs is limited to the local, anisotropic Uni…
SKA Weak Lensing I: Cosmological Forecasts and the Power of Radio-Optical Cross-Correlations
Ian Harrison, Stefano Camera, Joe Zuntz +1
We construct forecasts for cosmological parameter constraints from weak gravitational lensing surveys involving the Square Kilometre Array (SKA). Considering matter content, dark e…
Impact of Redshift Information on Cosmological Applications with Next-Generation Radio Surveys
Stefano Camera, Mário G. Santos, David J. Bacon +5
In this paper, we explore how the forthcoming generation of large-scale radio continuum surveys, with the inclusion of some degree of redshift information, can constrain cosmologic…
Neglecting Primordial non-Gaussianity Threatens Future Cosmological Experiment Accuracy
Stefano Camera, Carmelita Carbone, Cosimo Fedeli +1
Future galaxy redshift surveys aim at probing the clustering of the cosmic large-scale structure with unprecedented accuracy, thus complementing cosmic microwave background experim…
Rubin-Euclid Derived Data Products: Initial Recommendations
Leanne P. Guy, Jean-Charles Cuillandre, Etienne Bachelet +117
This report is the result of a joint discussion between the Rubin and Euclid scientific communities. The work presented in this report was focused on designing and recommending an…
Constraining gravity with synergies between radio and optical cosmological surveys
Santiago Casas, Isabella P. Carucci, Valeria Pettorino +2
In this work we present updated forecasts on parameterised modifications of gravity that can capture deviations of the behaviour of cosmological density perturbations beyond CD…
Tomographic-spectral approach for dark matter detection in the cross-correlation between cosmic shear and diffuse gamma-ray emission
Stefano Camera, Mattia Fornasa, Nicolao Fornengo +1
We recently proposed to cross-correlate the diffuse extragalactic gamma-ray background with the gravitational lensing signal of cosmic shear. This represents a novel and promising…
Detecting the relativistic bispectrum in 21cm intensity maps
Sheean Jolicoeur, Roy Maartens, Eline M. De Weerd +3
We investigate the detectability of leading-order relativistic effects in the bispectrum of future 21cm intensity mapping surveys. The relativistic signal arises from Doppler and o…
Single-dish HI Intensity Mapping with the SKAO: Precursor Progress with MeerKAT's Large Area Synoptic Survey (MeerKLASS)
Steven Cunnington, Jingying Wang, Mario G. Santos +16
Using the SKAO to map the intensity of neutral hydrogen's 21cm emission line will be a golden opportunity to constrain models of cosmology. To access the largest cosmological scale…
Tomography from the Next Generation of Cosmic Shear Experiments for Viable f(R) Models
Stefano Camera, Antonaldo Diaferio, Vincenzo F. Cardone
We present the cosmic shear signal predicted by two viable cosmological models in the framework of modified-action f(R) theories. We use f(R) models where the current accelerated e…
Does Quartessence Ease Tensions?
Stefano Camera, Matteo Martinelli, Daniele Bertacca
Tensions between cosmic microwave background observations and the growth of the large-scale structure inferred from late-time probes pose a serious challenge to the concordance $Î…
Measuring baryon acoustic oscillations with future SKA surveys
Philip Bull, Stefano Camera, Alvise Raccanelli +4
The imprint of baryon acoustic oscillations (BAO) in large-scale structure can be used as a standard ruler for mapping out the cosmic expansion history, and hence for testing cosmo…
Cosmology from HI galaxy surveys with the SKA
Ainulnabilah Nasirudin, Philip Bull, Ziad Sakr +8
The 21cm line from neutral hydrogen is expected to be a ubiquitous (albeit faint) tracer of galaxies in the late Universe. With SKAO-MID, large wide-field surveys of several millio…
A measurement of the Integrated Sachs-Wolfe Effect with the Rapid ASKAP Continuum Survey
Benedict Bahr-Kalus, David Parkinson, Jacobo Asorey +3
The evolution of the gravitational potentials on large scales due to the accelerated expansion of the Universe is an important and independent probe of dark energy, known as the in…
Accelerating f(T) gravity models constrained by recent cosmological data
Vincenzo F. Cardone, Ninfa Radicella, Stefano Camera
Generalised Teleparallel gravity, also referred to as f(T) gravity, has been recently proposed as an extended theory of gravitation able to give rise to an accelerated expansion in…
The Wide-field Spectroscopic Telescope (WST) Science White Paper
Vincenzo Mainieri, Richard I. Anderson, Jarle Brinchmann +214
The Wide-field Spectroscopic Telescope (WST) is proposed as a new facility dedicated to the efficient delivery of spectroscopic surveys. This white paper summarises the initial con…
Detecting the relativistic galaxy bispectrum
Roy Maartens, Sheean Jolicoeur, Obinna Umeh +3
The Fourier-space galaxy bispectrum is complex, with the imaginary part arising from leading-order relativistic corrections, due to Doppler, gravitational redshift and related line…
Testing a Phenomenologically Extended DGP Model with Upcoming Weak Lensing Surveys
Stefano Camera, Antonaldo Diaferio, Vincenzo F. Cardone
A phenomenological extension of the well-known brane-world cosmology of Dvali, Gabadadze and Porrati (eDGP) has recently been proposed. In this model, a cosmological-constant-like…
Radio Galaxy populations and the multi-tracer technique: pushing the limits on primordial non-Gaussianity
Luis D. Ferramacho, Mario G. Santos, Matt J. Jarvis +1
We explore the use of different radio galaxy populations as tracers of different mass halos and therefore, with different bias properties, to constrain primordial non-Gaussianity o…
Complex yet Hermitian: Gaussian covariance of cross-correlation and multi-tracer power spectra
Federico Montano, Stefano Camera, Emiliano Sefusatti +1
Accurate modelling of the covariance of clustering observables is essential to fully exploit current and future survey data, which is expected to constrain large-scale clustering s…
Unbiased analysis of primordial non-Gaussianity: the multipoles of the full relativistic power spectrum
Chris Addis, Sêcloka L. Guedezounme, Jessie Hammond +5
A major goal of ongoing and future cosmological surveys of the large-scale structure is to measure local type primordial non-Gaussianity in the galaxy power spectrum through the sc…
Cosmology with Intensity Mapping via Statistics Beyond the Power Spectrum in the SKAO Era
Suman Majumdar, Debanjan Sarkar, Leon Noble +38
The cosmological distribution of neutral hydrogen (HI) during the post-reionization era is highly non-Gaussian due to the underlying non-linear structure formation, complex galaxy…
Emission-line Stacking of 21cm Intensity Maps with MeerKLASS: Inference Pipeline and Application to the L-band Deep-field Data
Zhaoting Chen, Steven Cunnington, Alkistis Pourtsidou +11
We present a novel analysis of observational systematics through the emission-line stacking of the MeerKLASS L-band deep-field intensity maps, following the detection in arXiv:2407…
Detectability of Torsion Gravity via Galaxy Clustering and Cosmic Shear Measurements
Stefano Camera, Vincenzo F. Cardone, Ninfa Radicella
Alterations of the gravity Lagrangian introduced in modified torsion gravity theories---also referred to as gravity---allows for an accelerated expansion in a matter dominat…
The HI intensity mapping power spectrum: insights from recent measurements
Hamsa Padmanabhan, Roy Maartens, Obinna Umeh +1
The first direct measurements of the HI intensity mapping power spectrum were recently made using the MeerKAT telescope. These measurements are on nonlinear scales, at redshifts 0.…
Constraining f(R) theories with Type Ia Supernovae and Gamma Ray Bursts
Vincenzo F. Cardone, Antonaldo Diaferio, Stefano Camera
Fourth - order gravity theories have received much interest in recent years thanks to their ability to provide an accelerated cosmic expansion in a matter only universe. In these t…
EMU: Cross-correlating EMU Pilot Survey 1 with Dark Energy Survey to validate the radio galaxy bias and redshift distribution
Chandra Shekhar Saraf, David Parkinson, Jacobo Asorey +6
Radio continuum galaxy surveys can provide a relatively fast map of the projected distribution of structure in the Universe, at the cost of lacking information about the radial dis…
Model-independent constraints on clustering and growth of cosmic structures from BOSS DR12 galaxies in harmonic space
Konstantinos Tanidis, Stefano Camera
We present a new, model-independent measurement of the clustering amplitude of galaxies and the growth of cosmic large-scale structures from the Baryon Oscillation Spectroscopic Su…
Kinematic lensing with high-resolution spectroscopic surveys. A unique opportunity for transformative cosmology at high redshifts in the 2040s
Stefano Camera, Martin Kilbinger, Jean-Paul Kneib +10
We present a science case to perform high-redshift cosmic shear surveys for cosmology with next-generation spectroscopic instruments, such as the proposed MegaMapper and Wide-field…
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,…
Overview: Cosmology with the SKAO
Marta Spinelli, Ian Harrison, Richard A. Battye +5
The SKA telescopes will revolutionise our ability to do cosmology at radio wavelengths, via both their own data and in synergy with other wavelengths. SKAO will be the first instru…
Detecting Relativistic Doppler in Galaxy Clustering with Tailored Galaxy Samples
Federico Montano, Stefano Camera
We present a method to obtain a high-significance detection of relativistic effects on cosmological scales. Measurements of such effects would be instrumental for our understanding…
Measuring redshift-space distortions with future SKA surveys
Alvise Raccanelli, Philip Bull, Stefano Camera +8
The peculiar motion of galaxies can be a particularly sensitive probe of gravitational collapse. As such, it can be used to measure the dynamics of dark matter and dark energy as w…
Beyond power spectrum to unveil systematics on HI intensity maps
Pauline Gorbatchev, Jean-Luc Starck, Stefano Camera +1
HI intensity mapping is a promising technique to probe large-scale structure, traditionally analyzed via two-point statistics such as the angular power spectrum. This technique has…
Cosmology from HI galaxy surveys with the SKA
Filipe B. Abdalla, Philip Bull, Stefano Camera +8
The Square Kilometer Array (SKA) has the potential to produce galaxy redshift surveys which will be competitive with other state of the art cosmological experiments in the next dec…
An updated analysis of two classes of f(R) theories of gravity
Vincenzo F. Cardone, Stefano Camera, Antonaldo Diaferio
The observed accelerated cosmic expansion can be a signature of fourth\,-\,order gravity theories, where the acceleration of the Universe is a consequence of departures from Einste…
Flux dependence of redshift distribution and clustering of LOFAR radio sources
Nitesh Bhardwaj, Dominik J. Schwarz, Catherine L. Hale +10
In this work we study the flux density dependence of the redshift distribution of low-frequency radio sources observed in the LOFAR Two-metre Sky Survey (LoTSS) deep fields and app…
Constraining ultra-high-energy cosmic ray composition through cross-correlations
Konstantinos Tanidis, Federico R. Urban, Stefano Camera
The chemical composition of the highest end of the ultra-high-energy cosmic ray spectrum is very hard to measure experimentally, and to this day it remains mostly unknown. Since th…
The degeneracy between primordial non-Gaussianity and foregrounds in 21cm intensity mapping experiments
Steven Cunnington, Stefano Camera, Alkistis Pourtsidou
Potential evidence for primordial non-Gaussianity (PNG) is expected to lie in the largest scales mapped by cosmological surveys. Forthcoming 21cm intensity mapping experiments will…
Detecting ultra-high energy cosmic ray anisotropies through cross-correlations
Federico R. Urban, Stefano Camera, David Alonso
We propose an observable for ultra-high energy cosmic ray (UHECR) physics: the harmonic-space cross-correlation power spectrum between the arrival directions of UHECRs and the larg…
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…
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…
Radio-optical synergies at high redshift to constrain primordial non-Gaussianity
Matilde Barberi Squarotti, Stefano Camera, Roy Maartens
We apply the multi-tracer technique to test the possibility of improved constraints on the amplitude of local primordial non-Gaussianity, , in the cosmic large-sca…
Magnification bias as a novel probe for primordial magnetic fields
Stefano Camera, Cosimo Fedeli, Lauro Moscardini
In this paper we investigate magnetic fields generated in the early Universe. These fields are important candidates at explaining the origin of astrophysical magnetism observed in…
Measuring dark energy with expansion and growth
Louis Perenon, Matteo Martinelli, Roy Maartens +2
We combine cosmic chronometer and growth of structure data to derive the redshift evolution of the dark energy equation of state , using a novel agnostic approach. The backgroun…
Einstein's legacy in galaxy surveys
Stefano Camera, Roy Maartens, Mario G. Santos
Non-Gaussianity in the primordial fluctuations that seeded structure formation produces a signal in the galaxy power spectrum on very large scales. This signal contains vital infor…
Baryon acoustic oscillations from HI intensity mapping: the importance of cross-correlations in the monopole and quadrupole
Andrea Rubiola, Steven Cunnington, Stefano Camera
Cosmological parameter estimation in the post-reionisation era via neutral hydrogen radio emission ($\text{\hi}$), is among the key science goals of the forthcoming SKA Observatory…
Probing primordial non-Gaussianity via iSW measurements with SKA continuum surveys
Alvise Raccanelli, Olivier Doré, David J. Bacon +8
The Planck CMB experiment has delivered the best constraints so far on primordial non-Gaussianity, ruling out early-Universe models of inflation that generate large non-Gaussianity…
Weak Lensing with SKAO: Cosmic Shear Cosmology
Ian Harrison, Roberto Ingrao, Stefano Camera +4
We discuss the power of weak gravitational lensing surveys with the SKAO in constraining cosmological parameters and the properties of radio star-forming galaxy samples. As well as…
Synergies across the spectrum for particle dark matter indirect detection: how HI intensity mapping meets gamma rays
Elena Pinetti, Stefano Camera, Nicolao Fornengo +1
Neutral hydrogen (HI) intensity mapping traces the large-scale distribution of matter in the Universe and therefore should correlate with the gamma-ray emission originated from par…
Beyond ÎCDM with the SKA Observatory -- II: Unveiling the Secrets of the Early Universe
José Fonseca, Benedict Bahr-Kalus, Mario Ballardini +12
The origins of the universe remain one of the biggest mysteries in modern cosmology. While the Planck satellite has provided a wealth of information about the early universe, there…
Hunting down horizon-scale effects with multi-wavelength surveys
José Fonseca, Stefano Camera, Mário G. Santos +1
Next-generation cosmological surveys will probe ever larger volumes of the Universe, including the largest scales, near and beyond the horizon. On these scales, the galaxy power sp…
Weak lensing signal in Unified Dark Matter models
Stefano Camera, Daniele Bertacca, Antonaldo Diaferio +2
Weak gravitational lensing is a powerful tool for studying both the geometry and the dynamics of the Universe. Its power spectrum contains information on the sources emitting photo…
MeerKLASS L-band deep-field intensity maps: entering the HI dominated regime
MeerKLASS Collaboration, Matilde Barberi-Squarotti, José L. Bernal +18
We present results from MeerKAT single-dish HI intensity maps, the final observations to be performed in L-band in the MeerKAT Large Area Synoptic Survey (MeerKLASS) campaign. The…
The Power of Cosmic Flexion in Testing Modified Matter and Gravity
Stefano Camera, Antonaldo Diaferio
Flexion is the weak lensing effect responsible for the weakly skewed and arc-like appearance of lensed galaxies. The flexion signal-to-noise ratio can be an order of magnitude larg…
HI Simulations for Cosmology with the SKA Observatory
Tommaso Ronconi, Gabriella De Lucia, Marta Spinelli +15
We present a comparative overview of state-of-the-art methods for modelling the distribution of neutral hydrogen (HI) in the post-reionization Universe, developed in preparation fo…
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…
Cosmology on Ultralarge Scales with Intensity Mapping of the Neutral Hydrogen 21 cm Emission: Limits on Primordial Non-Gaussianity
Stefano Camera, Mario G. Santos, Pedro G. Ferreira +1
The large-scale structure of the Universe supplies crucial information about the physical processes at play at early times. Unresolved maps of the intensity of 21 cm emission from…
Inclusive Constraints on Unified Dark Matter Models from Future Large-Scale Surveys
Stefano Camera, Carmelita Carbone, Lauro Moscardini
In the very last years, cosmological models where the properties of the dark components of the Universe - dark matter and dark energy - are accounted for by a single "dark fluid" h…
Probing General Relativity on Cosmological Scales in the 2040s
Federico Montano, Samantha J. Rossiter, Chris Addis +18
General relativity is exquisitely tested in strong-field regimes, yet its validity on cosmological scales remains largely unexplored. Upcoming wide and deep large-scale structure s…
Wiener filtering and multi-tracer techniques for dark matter cross-correlations between gamma-ray emission and galaxy catalogs
Andrea Rubiola, Stefano Camera, Nicolao Fornengo
Cross-correlations between a gravitational tracer of dark matter and the contribution to the unresolved gamma-ray background (UGRB) from the radiation produced by the annihilation…
Estimating the weak-lensing rotation signal in radio cosmic shear surveys
Daniel B. Thomas, Lee Whittaker, Stefano Camera +1
Weak lensing has become an increasingly important tool in cosmology and the use of galaxy shapes to measure cosmic shear has become routine. The weak-lensing distortion tensor cont…
Cosmology with a SKA HI intensity mapping survey
Mario G. Santos, Philip Bull, David Alonso +11
HI intensity mapping (IM) is a novel technique capable of mapping the large-scale structure of the Universe in three dimensions and delivering exquisite constraints on cosmology, b…
Cosmology with HI Intensity Mapping
Laura Wolz, Gabriele Autieri, José Luis Bernal +18
The redshifted spectral emission from neutral hydrogen (HI) at rest wavelength 21 cm can be used as a tracer of large-scale structure and its evolution. Within the HI intensity map…
Probing primordial non-Gaussianity with SKA galaxy redshift surveys: a fully relativistic analysis
Stefano Camera, Mario G. Santos, Roy Maartens
The Square Kilometre Array (SKA) will produce spectroscopic surveys of tens to hundreds of millions of HI galaxies, eventually covering 30,000 sq. deg. and reaching out to redshift…
Revealing cosmological fluctuations in 21cm intensity maps with MeerKLASS: from maps to power spectra
Steven Cunnington, Matilde Barberi-Squarotti, José Luis Bernal +8
Mapping the integrated 21cm emission line from dark matter-tracing neutral hydrogen gas is the primary science goal for MeerKLASS (MeerKAT's Large Area Synoptic Survey). Prior to t…
meer21cm: an Analysis Pipeline and Comprehensive Toolkit for HI Intensity Mapping
Zhaoting Chen, Steven Cunnington, Daniel Tassie +23
We present meer21cm, a comprehensive python package for cosmological data analysis of single-dish HI intensity mapping surveys. This package is simple to use, with a modularised co…
SKA Weak Lensing III: Added Value of Multi-Wavelength Synergies for the Mitigation of Systematics
Stefano Camera, Ian Harrison, Anna Bonaldi +1
In this third paper of a series on radio weak lensing for cosmology with the Square Kilometre Array, we scrutinise synergies between cosmic shear measurements in the radio and opti…
Detecting Relativistic Doppler by Multi-Tracing a Single Galaxy Population
Federico Montano, Stefano Camera
New data from ongoing galaxy surveys, such as the satellite and the Dark Energy Spectroscopic Instrument (DESI), are expected to unveil physics on the largest scales of ou…
Methodological Frontiers in 21-cm Intensity Mapping: the Treatment of Systematics and Foreground Contamination
Marta Spinelli, Matilde Barberi-Squarotti, José Luis Bernal +29
The distribution of neutral hydrogen (HI) in the post-reionization universe traces the cosmic large-scale structure and therefore serves as a powerful cosmological probe. An effici…
Decoupling Local Primordial non-Gaussianity from Relativistic Effects in the Galaxy Bispectrum
Samantha Rossiter, Stefano Camera, Chris Clarkson +1
Upcoming galaxy surveys aim to map the Universe with unprecedented precision, depth and sky coverage. The galaxy bispectrum is a prime source of information as it allows us to prob…
Measuring Unified Dark Matter with 3D Cosmic Shear
Stefano Camera, Thomas D. Kitching, Alan F. Heavens +2
We present parameter estimation forecasts for future 3D cosmic shear surveys for a class of Unified Dark Matter (UDM) models, where a single scalar field mimics both Dark Matter (D…
Searching for gamma-ray emission from galaxy clusters at low redshift
Manuel Colavincenzo, Xiuhui Tan, Simone Ammazzalorso +4
We report the identification of a positive cross-correlation signal between the unresolved -ray emission, measured by the \emph{Fermi} Large Area Telescope, and four different…
A novel method for unbiased measurements of growth with cosmic shear
Stefano Camera
I present a new technique for the measurement of the growth of cosmic structures via the power spectrum of weak lensing cosmic shear. It is based on a template-fitting approach, wh…
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…
Relativistic and wide-angle corrections to galaxy power spectra
Sheean Jolicoeur, Sêcloka L. Guedezounme, Roy Maartens +3
Galaxy surveys contain information on the largest scales via wide-angle and relativistic contributions. By combining two different galaxy populations, we can suppress the strong co…
Speeding up the detectability of the harmonic-space galaxy bispectrum
Francesco Montanari, Stefano Camera
We present a method that allows us for the first time to estimate the signal-to-noise ratio (SNR) of the harmonic-space galaxy bispectrum induced by gravity, a complementary probe…
Cosmology with Tully-Fisher HI Galaxy Surveys
Joël Mayor, Anthony Carr, Khaled Said +7
The SKA Observatory will enable measurements of the Tully-Fisher relation for statistical samples of HI selected galaxies out to unprecedented depths and redshifts thanks to its un…
Squeezing information from radio surveys to probe the primordial Universe
Dionysios Karagiannis, Roy Maartens, Shun Saito +3
A major goal of cosmology is to understand the nature of the field(s) which drove primordial Inflation. Through future observations, the statistics of large-scale structure will al…
SuperCLASS -- I. The Super CLuster Assisted Shear Survey: Project overview and Data Release 1
Richard A. Battye, Michael L. Brown, Caitlin M. Casey +24
The SuperCLuster Assisted Shear Survey (SuperCLASS) is a legacy programme using the e-MERLIN interferometric array. The aim is to observe the sky at L-band (1.4 GHz) to a r.m.s. of…
Cosmology and Fundamental Physics with the Euclid Satellite
Luca Amendola, Stephen Appleby, Anastasios Avgoustidis +69
Euclid is a European Space Agency medium class mission selected for launch in 2020 within the Cosmic Vision 2015 2025 program. The main goal of Euclid is to understand the origin o…
Honing cross-correlation tools for inference on ultra-high-energy cosmic-ray composition
Konstantinos Tanidis, Federico R. Urban, Stefano Camera
The chemical composition of the highest-energy cosmic rays, namely the atomic number of rays with energies , remains to date largely unknown. Some info…
Solar System Tests in Brans-Dicke and Palatini f(R)-theories
Alice Bonino, Stefano Camera, Lorenzo Fatibene +1
We compare Mercury's precession test in standard General Relativity (GR), Brans-Dicke theories (BD), and Palatini f(R)-theories. We avoid post Newtonian (PN) approximation and comp…
Detecting Local and Integrated Relativistic Effects by Multi-Tracing a Single Galaxy Population in Harmonic Space
Marco Novara, Federico Montano, Stefano Camera
Measuring relativistic effects on cosmological scales would provide further confirmation of the validity of general relativity in the still poorly tested condition of weak gravity.…
Beyond CDM with HI intensity mapping: robustness of cosmological constraints in the presence of astrophysics
Stefano Camera, Hamsa Padmanabhan
Mapping the unresolved intensity of the 21-cm emission of neutral hydrogen (HI) is now regarded as one the most promising tools for cosmological investigation in the coming decades…
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…
SuperCLASS -- III. Weak lensing from radio and optical observations in Data Release 1
Ian Harrison, Michael L. Brown, Ben Tunbridge +17
We describe the first results on weak gravitational lensing from the SuperCLASS survey: the first survey specifically designed to measure the weak lensing effect in radio-wavelengt…
Cosmology with ESO-SKAO Synergies
Mario G. Santos, Stefano Camera, Zhaoting Chen +2
We discuss the possible synergies for cosmology between SKAO and ESO facilities, focusing on the combinations SKA-Mid with the Multi-Object Spectrograph Telescope (4MOST) instrumen…
Observational Frontiers in the post-EoR 21-cm Intensity Mapping: Lessons from the SKA Pathfinders
Khandakar Md Asif Elahi, Somnath Bharadwaj, Philip Bull +21
The 21-cm line from neutral hydrogen has long been recognised as a promising tracer of the large-scale structure of the Universe. The line is weak however, making individual galaxy…
Cosmology from LOFAR Two-metre Sky Survey Data Release 2: Cross-correlations with luminous red galaxies from eBOSS
Jinglan Zheng, Prabhakar Tiwari, Gong-Bo Zhao +7
We cross-correlated galaxies from the LOw-Frequency ARray (LOFAR) Two-metre Sky Survey (LoTSS) second data release (DR2) radio source with the extended Baryon Oscillation Spectrosc…
Ultra-large-scale approximations and galaxy clustering: debiasing constraints on cosmological parameters
Matteo Martinelli, Roohi Dalal, Fereshteh Majidi +3
Upcoming galaxy surveys will allow us to probe the growth of the cosmic large-scale structure with improved sensitivity compared to current missions, and will also map larger areas…
Beyond CDM: Problems, solutions, and the road ahead
Philip Bull, Yashar Akrami, Julian Adamek +37
Despite its continued observational successes, there is a persistent (and growing) interest in extending cosmology beyond the standard model, CDM. This is motivated by a range…
Cross-correlation of weak lensing and gamma rays: implications for the nature of dark matter
Tilman Tröster, Stefano Camera, Mattia Fornasa +12
We measure the cross-correlation between Fermi-LAT gamma-ray photons and over 1000 deg of weak lensing data from the Canada-France-Hawaii Telescope Lensing Survey (CFHTLenS), t…
Developing a unified pipeline for large-scale structure data analysis with angular power spectra -- II. A case study for magnification bias and radio continuum surveys
Konstantinos Tanidis, Stefano Camera, David Parkinson
Following on our purpose of developing a unified pipeline for large-scale structure data analysis with angular (i.e. harmonic-space) power spectra, we now include the weak lensing…
Advancing Astrophysics with the SKA II
Anna Bonaldi, Tyler L. Bourke, Philippa Hartley +45
Advancing Astrophysics with the SKA II (AASKAII), written by our science community, outlines the transformative scientific advances that will be enabled by the SKA telescopes. In t…
Towards simulating a realistic data analysis with an optimised angular power spectrum of spectroscopic galaxy surveys
Guglielmo Faggioli, Konstantinos Tanidis, Stefano Camera
The angular power spectrum is a natural tool to analyse the observed galaxy number count fluctuations. In a standard analysis, the angular galaxy distribution is sliced into concen…
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…
Developing a unified pipeline for large-scale structure data analysis with angular power spectra -- I. The importance of redshift-space distortions for galaxy number counts
Konstantinos Tanidis, Stefano Camera
We develop a cosmological parameter estimation code for (tomographic) angular power spectra analyses of galaxy number counts, for which we include, for the first time, redshift-spa…
Halving and Doubling: Boosting the Detection of Relativistic Effects in the Galaxy Bispectrum with Optimal Subsample Selection
Samantha Josephine Rossiter, Stefano Camera, Federico Montano +3
On the scale of the cosmic horizon, signatures that are unique to general relativity are concealed within the statistics of the large scale distribution of galaxies. These were tho…
Cross-correlating the gamma-ray sky with catalogs of galaxy clusters
Enzo Branchini, Stefano Camera, Alessandro Cuoco +4
We report the detection of a cross-correlation signal between {\it Fermi} Large Area Telescope diffuse gamma-ray maps and catalogs of clusters. In our analysis, we considered three…