299 citations · 823 across the 34 of their papers we have counts for
35 papers
Cosmography for a General Spacetime Centred at Arbitrary Redshift
Jonas Broe Bendtsen, Asta Heinesen, Sofie Marie Koksbang
With upcoming surveys providing large volumes of highly precise observational data across a wide range of redshifts, it is increasingly important to have tools that can translate o…
Post-Newtonian Global Conservation Laws in the Presence of Sensitive Bodies
Timothy Clifton, Asta Heinesen, Oliver Pitt
The parameterized post-Newtonian (PPN) approach is the state of the art formalism for performing theory independent tests of weak-field gravity, and for constraining possible devia…
Mapping the Universe as a Bianchi I cosmology with Gaia data
Valeri V. Makarov, Asta Heinesen, Thomas Schücker
Measurements of tangential drifts of distant quasars and galactic nuclei on the celestial sphere provide a novel and independent method of testing cosmological hypotheses. In this…
Observational Quantities in Quasi-Newtonian Descriptions of Cosmological Space-Times
Asta Heinesen, Davide Fontana, Timothy Clifton
We investigate measures of distance and redshift in cosmological space-times that admit a shear-free foliation, which we henceforth refer to as `quasi-Newtonian'. Space expands iso…
Observational Tests for Distinguishing Classes of Cosmological Models
Asta Heinesen, Timothy Clifton
We investigate observational tests that can be used to distinguish between broad classes of cosmological models. This is achieved using curvature-consistency tests of the Friedmann…
Diagnostic Consistency Tests of the Concordance Cosmology
S. M. Koksbang, A. Heinesen
The CDM cosmological model faces increasingly significant and robust tensions among independent cosmological probes, prompting renewed scrutiny of its foundational assumptions.…
Model-independent constraints on generalized FLRW consistency relations with bootstrap-based symbolic regression
S. M. Koksbang, A. Heinesen
The standard CDM cosmological model faces increasing tensions between key observations, motivating tests that probe its underlying assumptions. In a companion letter, we present…
Cosmography with -Szekeres Models
Morag Hills, Asta Heinesen
The cosmological tensions present in the cold dark matter model that have emerged and strengthened over recent years motivate model independent approaches to analysing data. Co…
Position drift with Gaia
Andreas Tsigkas Kouvelis, Asta Heinesen, Shashank Shalgar +1
The proper motion (also known as position drift) field of extragalactic sources at cosmological distances across our sky can be used to measure the acceleration of the Solar System…
A theoretical prediction for the dipole in nearby distances using cosmography
Hayley J. Macpherson, Asta Heinesen
Cosmography is a widely applied method to infer kinematics of the Universe at small cosmological scales while remaining agnostic about the theory of gravity at play. Usually cosmol…
The CosmoVerse White Paper: Addressing observational tensions in cosmology with systematics and fundamental physics
Eleonora Di Valentino, Jackson Levi Said, Adam Riess +533
The standard model of cosmology has provided a good phenomenological description of a wide range of observations both at astrophysical and cosmological scales for several decades.…
Differential age observations and their constraining power in cosmology
Asta Heinesen
We derive the differential age signal valid for cosmic chronometers (passively evolving galaxies) in any space-time that satisfies the following assumptions: (i) The space-time has…
Exploring the rich geometrical information in cosmic drift signals with covariant cosmography
Asta Heinesen, Mikołaj Korzyński
Real-time measurements are becoming feasible in cosmology, where the next generation of telescopes will detect the temporal change of redshifts and sky positions of individual sour…
Redshift drift in a universe with structure III: Numerical relativity
Sofie Marie Koksbang, Asta Heinesen, Hayley J. Macpherson
Measurements of the cosmic redshift drift - the change in redshift of a source over time - will enable independent detection of cosmological expansion thanks to the immense precisi…
Splitting the spacetime: A systematic analysis of foliation dependence in cosmic averaging
Pierre Mourier, Asta Heinesen
It is a fundamental unsolved question in general relativity how to unambiguously characterize the effective collective dynamics of an ensemble of fluid elements sourcing the local…
Towards Cosmography of the Local Universe
Julian Adamek, Chris Clarkson, Ruth Durrer +3
Anisotropies in the distance-redshift relation of cosmological sources are expected due to large-scale inhomogeneities in the local Universe. When the observed sources are tracing…
Bulk flows in the local Universe and the importance of relativistic effects
Asta Heinesen
Bulk flow velocities are typically estimated in the idealised picture where observers are moving within a perfectly homogeneous and isotropic space-time. This picture is consistent…
Reconciling a decelerating Universe with cosmological observations
Asta Heinesen
Can modern cosmological observations be reconciled with a general-relativistic Universe without an anti-gravitating energy source? Usually, the answer to this question by cosmologi…
The quadrupole in the local Hubble parameter: first constraints using Type Ia supernova data and forecasts for future surveys
Suhail Dhawan, Antonin Borderies, Hayley J. Macpherson +1
The cosmological principle asserts that the Universe looks spatially homogeneous and isotropic on sufficiently large scales. Given the fundamental implications of the cosmological…
Redshift drift in a universe with structure I: Lemaitre-Tolman-Bondi structures with arbitrary angle of entry of light
Sofie Marie Koksbang, Asta Heinesen
We consider the redshift drift and position drift associated with astrophysical sources in a formalism that is suitable for describing emitters and observers of light in an arbitra…
Cosmology Intertwined: A Review of the Particle Physics, Astrophysics, and Cosmology Associated with the Cosmological Tensions and Anomalies
Elcio Abdalla, Guillermo Franco Abellán, Amin Aboubrahim +200
In this paper we will list a few important goals that need to be addressed in the next decade, also taking into account the current discordances between the different cosmological…
The averaging problem on the past null cone in inhomogeneous dust cosmologies
Thomas Buchert, Henk van Elst, Asta Heinesen
Cosmological models typically neglect the complicated nature of the spacetime manifold at small scales in order to hypothesize idealized general relativistic solutions for describi…
A prediction for anisotropies in the nearby Hubble flow
Asta Heinesen, Hayley J. Macpherson
We assess the dominant low-redshift anisotropic signatures in the distance-redshift relation and redshift drift signals. We adopt general-relativistic irrotational dust models allo…
Redshift drift cosmography for model-independent cosmological inference
Asta Heinesen
We develop a cosmographic framework for analysing redshift drift signals of nearby sources model-independently, i.e., without making assumptions about the metric description of the…