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Reproducibility of machine learning analyses of 21 cm reionization maps
Kimeel Sooknunan, Emma Chapman, Luke Conaboy +2
Machine learning (ML) methods have become popular for parameter inference in cosmology, although their reliance on specific training data can cause difficulties when applied across…
Field-level inference of cosmic shear with intrinsic alignments and baryons
Natalia Porqueres, Alan Heavens, Daniel Mortlock +2
We construct a field-based Bayesian Hierarchical Model for cosmic shear that includes, for the first time, the important astrophysical systematics of intrinsic alignments and baryo…
Forward modeling of galaxy populations for cosmological redshift distribution inference
Justin Alsing, Hiranya Peiris, Daniel Mortlock +2
We present a forward modeling framework for estimating galaxy redshift distributions from photometric surveys. Our forward model is composed of: a detailed population model describ…
Lifting weak lensing degeneracies with a field-based likelihood
Natalia Porqueres, Alan Heavens, Daniel Mortlock +1
We present a field-based approach to the analysis of cosmic shear data to infer jointly cosmological parameters and the dark matter distribution. This forward modelling approach sa…
Prospects for Measuring the Hubble Constant with Neutron-Star-Black-Hole Mergers
Stephen M. Feeney, Hiranya V. Peiris, Samaya M. Nissanke +1
Gravitational wave (GW) and electromagnetic (EM) observations of neutron-star-black-hole (NSBH) mergers can provide precise local measurements of the Hubble constant (), ideal…
Bayesian forward modelling of cosmic shear data
Natalia Porqueres, Alan Heavens, Daniel Mortlock +1
We present a Bayesian hierarchical modelling approach to infer the cosmic matter density field, and the lensing and the matter power spectra, from cosmic shear data. This method us…
Unbiased Hubble constant estimation from binary neutron star mergers
Daniel J. Mortlock, Stephen M. Feeney, Hiranya V. Peiris +2
Gravitational wave (GW) observations of binary neutron star (BNS) mergers can be used to measure luminosity distances and hence, when coupled with estimates for the mergers' host r…
Prospects for resolving the Hubble constant tension with standard sirens
Stephen M. Feeney, Hiranya V. Peiris, Andrew R. Williamson +4
The Hubble constant () estimated from the local Cepheid-supernova (SN) distance ladder is in 3- tension with the value extrapolated from cosmic microwave background (CMB) d…
Clarifying the Hubble constant tension with a Bayesian hierarchical model of the local distance ladder
Stephen M. Feeney, Daniel J. Mortlock, Niccolò Dalmasso
Estimates of the Hubble constant, , from the distance ladder and the cosmic microwave background (CMB) differ at the 3- level, indicating a potential issue with the s…
Observations of the Lyman series forest towards the redshift 7.1 quasar ULAS J1120+0641
R. Barnett, S. J. Warren, G. D. Becker +5
We present a 30h integration Very Large Telescope X-shooter spectrum of the Lyman series forest towards the quasar ULAS J1120+0641. The only detected transmission at ${…
Hierarchical Bayesian inference of galaxy redshift distributions from photometric surveys
Boris Leistedt, Daniel J. Mortlock, Hiranya V. Peiris
Accurately characterizing the redshift distributions of galaxies is essential for analysing deep photometric surveys and testing cosmological models. We present a technique to simu…
Planck intermediate results. XLI. A map of lensing-induced B-modes
Planck Collaboration, P. A. R. Ade, N. Aghanim +178
The secondary cosmic microwave background (CMB) -modes stem from the post-decoupling distortion of the polarization -modes due to the gravitational lensing effect of large-sc…
Planck intermediate results. XL. The Sunyaev-Zeldovich signal from the Virgo cluster
Planck Collaboration, P. A. R. Ade, N. Aghanim +202
The Virgo cluster is the largest Sunyaev-Zeldovich (SZ) source in the sky, both in terms of angular size and total integrated flux. Planck's wide angular scale and frequency covera…
Quasars as probes of cosmological reionization
Daniel J. Mortlock
Quasars are the most luminous non-transient sources in the epoch of cosmological reionization (i.e., which ended a billion years after the Big Bang, corresponding to a redshift of…
Planck 2015 results. XXIII. The thermal Sunyaev-Zeldovich effect--cosmic infrared background correlation
Planck Collaboration, P. A. R. Ade, N. Aghanim +199
We use Planck data to detect the cross-correlation between the thermal Sunyaev-Zeldovich (tSZ) effect and the infrared emission from the galaxies that make up the the cosmic infrar…
Planck 2015 results. XII. Full Focal Plane simulations
Planck Collaboration, P. A. R. Ade, N. Aghanim +228
We present the 8th Full Focal Plane simulation set (FFP8), deployed in support of the Planck 2015 results. FFP8 consists of 10 fiducial mission realizations reduced to 18144 maps,…
Planck 2013 results. XXXI. Consistency of the Planck data
Planck Collaboration, P. A. R. Ade, M. Arnaud +180
The Planck design and scanning strategy provide many levels of redundancy that can be exploited to provide tests of internal consistency. One of the most important is the compariso…
Planck 2015 results. III. LFI systematic uncertainties
Planck Collaboration, P. A. R. Ade, J. Aumont +166
We present the current accounting of systematic effect uncertainties for the Low Frequency Instrument (LFI) that are relevant to the 2015 release of the Planck cosmological results…
Planck 2015 results. XI. CMB power spectra, likelihoods, and robustness of parameters
Planck Collaboration, N. Aghanim, M. Arnaud +221
This paper presents the Planck 2015 likelihoods, statistical descriptions of the 2-point correlations of CMB data, using the hybrid approach employed previously: pixel-based at $\e…
Planck 2015 results. XXVI. The Second Planck Catalogue of Compact Sources
Planck Collaboration, P. A. R. Ade, N. Aghanim +240
The Second Planck Catalogue of Compact Sources is a catalogue of sources detected in single-frequency maps from the full duration of the Planck mission and supersedes previous vers…
Planck 2015 results. XVI. Isotropy and statistics of the CMB
Planck Collaboration, P. A. R. Ade, N. Aghanim +242
We test the statistical isotropy and Gaussianity of the cosmic microwave background (CMB) anisotropies using observations made by the Planck satellite. Our results are based mainly…
Planck Intermediate Results. XXXVI. Optical identification and redshifts of Planck SZ sources with telescopes in the Canary Islands Observatories
Planck Collaboration, P. A. R. Ade, N. Aghanim +187
We present the results of approximately three years of observations of Planck Sunyaev-Zeldovich (SZ) sources with telescopes at the Canary Islands observatories as part of the gene…
Planck intermediate results. XXXVII. Evidence of unbound gas from the kinetic Sunyaev-Zeldovich effect
Planck Collaboration, P. A. R. Ade, N. Aghanim +189
By looking at the kinetic Sunyaev-Zeldovich effect (kSZ) in Planck nominal mission data, we present a significant detection of baryons participating in large-scale bulk flows aroun…
Bayesian model comparison in cosmology
Daniel J. Mortlock
The standard Bayesian model formalism comparison cannot be applied to most cosmological models as they lack well-motivated parameter priors. However, if the data-set being used is…