Below is a selection of my research projects. For a full list of my (openly accessible) publications, see the arxiv or you can find my publication stats at my NASA ADS profile.
In prep.
In prep.
In prep.
We review the evidence for a low value of S8 from cosmic shear. I will then argue that the discrepancy with the
Planck value of S8 may be a caused by uncertainties in the theoretical predictions for cosmic shear arising
from the modelling of the mass fluctuations on non-linear scales [Amon and Efstathiou 2022].
We present new measurements of the excess surface mass density profiles using the three state-of-the-art lensing surveys (DES, HSC, KiDS) and jointly analyse with BOSS galaxy clustering to assess their consistency on small and large-scales [Amon and Robertson et al 2022].
I co-pioneered the Lensing Without Borders cross-survey collaboration to test the consistency of weak lensing results [Amon+2017; Leauthaud & Amon+2021]
I was part of a small team preparing a note recommending target fields for commissioning, on behalf of the Dark Energy Science Collaboration [10].
Dark Energy Survey Year 3 Cosmology from Weak Lensing and Clustering 3x2pt: I played a pivotal role in the Dark Energy Survey Year 3 combined lensing and clustering cosmology analysis, leading the weak lensing results and coordinating three analysis teams to the most precise cosmological constraints of its kind [DES Collaboration 2021].
Dark Energy Survey Year 3 Cosmology from Cosmic Shear: I led and coordinated the Dark Energy Survey Year 3 cosmic shear lensing analysis using the most powerful data until present, of 100 million galaxies [Amon et al 2021].
Dark Energy Survey Deep Fields: I co-coordinated this team, responsible for the processing and validation of the deep, optical+NIR fields, crucial for the Year 3 analysis. [16]
I used machine learning and data science techniques to develop new statistical methods for accurate weak lensing measurements, especially for estimating and calibrating photometric redshifts for the Dark Energy Survey [15, 14].
I have worked on validating the Dark Energy Survey's Year 3 galaxy catalogue. Specifically, I tested the shape calibration, point spread function modelling and using image simulations to understand blending, whileand co-coordinated the shear testing team [11,12,13].
I performed a combined-probe test of General Relativity with weak lensing and spectroscopic data to measure the E_G statistic [Amon+2018]
I processed and analysed the bright-time, single i-band dataset from the KiDS survey, which already spanned >1000 sq. deg. in 2018. I tested the homogeneity of the survey, measured and validated the PSF, shears and redshift distributions and used it as a consistency test of the main KiDS data.
I was a core member of the 2dFLenS (a spectroscopic redshift survey designed as a follow-up of KiDS) taking observations and redshiting data. It uses the 2dF-AAOmega multi-fibre spectroscopic system at the Australian Astronomical Observatory [6].
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