Scholars@Duke
Arun Kannawadi Jayaraman

Arun Kannawadi Jayaraman

Assistant Research Professor in the Department of Physics
Physics
arun.kannawadi@duke.edu
120 Science Drive, Phy 097, Durham, NC 27708

Selected Publications

Euclid I. Overview of the Euclid mission

Journal Article Astronomy and Astrophysics · May 1, 2025 The current standard model of cosmology successfully describes a variety of measurements, but the nature of its main ingredients, dark matter and dark energy, remains unknown. Euclid is a medium-class mission in the Cosmic Vision 2015–2025 programme of the ... Full text Cite

The fifth data release of the Kilo Degree Survey: Multi-epoch optical/NIR imaging covering wide and legacy-calibration fields

Journal Article Astronomy and Astrophysics · June 1, 2024 We present the final data release of the Kilo-Degree Survey (KiDS-DR5), a public European Southern Observatory (ESO) wide-field imaging survey optimised for weak gravitational lensing studies. We combined matched-depth multi-wavelength observations from th ... Full text Cite

Hyper Suprime-Cam Year 3 results: Cosmology from cosmic shear two-point correlation functions

Journal Article Physical Review D · December 15, 2023 We perform a blinded cosmology analysis with cosmic shear two-point correlation functions measured from more than 25 million galaxies in the Hyper Suprime-Cam three-year shear catalog in four tomographic redshift bins ranging from 0.3 to 1.5. After conserv ... Full text Cite

Hyper Suprime-Cam Year 3 results: Cosmology from galaxy clustering and weak lensing with HSC and SDSS using the minimal bias model

Journal Article Physical Review D · December 15, 2023 We present cosmological parameter constraints from a blind joint analysis of three two-point correlation functions measured from the Year 3 Hyper Suprime-Cam (HSC-Y3) imaging data, covering about 416 deg2, and the SDSS DR11 spectroscopic galaxies spanning ... Full text Cite

Hyper Suprime-Cam Year 3 results: Cosmology from cosmic shear power spectra

Journal Article Physical Review D · December 15, 2023 We measure weak lensing cosmic shear power spectra from the 3-year galaxy shear catalog of the Hyper Suprime-Cam (HSC) Subaru Strategic Program imaging survey. The shear catalog covers 416 deg2 of the northern sky, with a mean i-band seeing of 0.59 arcsec ... Full text Cite

Hyper Suprime-Cam Year 3 results: Measurements of clustering of SDSS-BOSS galaxies, galaxy-galaxy lensing, and cosmic shear

Journal Article Physical Review D · December 15, 2023 We utilize the Sloan Digital Sky Survey Baryon Oscillation Spectroscopic Survey (SDSS-BOSS) galaxies and its overlap with approximately 416 sq degrees of deep grizy-band imaging from the Subaru Hyper Suprime-Cam Survey (HSC). We perform measurements of thr ... Full text Cite

Hyper Suprime-Cam Year 3 results: Cosmology from galaxy clustering and weak lensing with HSC and SDSS using the emulator based halo model

Journal Article Physical Review D · December 15, 2023 We present cosmology results from a blinded joint analysis of cosmic shear, ζ±, galaxy-galaxy weak lensing, Δς(R), and projected galaxy clustering, wp(R), measured from the Hyper Suprime-Cam three-year (HSC-Y3) shape catalog and the Sloan Digital Sky Surve ... Full text Cite

KiDS-1000: Cosmology with improved cosmic shear measurements

Journal Article Astronomy and Astrophysics · November 1, 2023 We present refined cosmological parameter constraints derived from a cosmic shear analysis of the fourth data release of the Kilo-Degree Survey (KiDS-1000). Our main improvements include enhanced galaxy shape measurements made possible by an updated versio ... Full text Cite

A general framework for removing point-spread function additive systematics in cosmological weak lensing analysis

Journal Article Monthly Notices of the Royal Astronomical Society · October 1, 2023 Cosmological weak lensing measurements rely on a precise measurement of the shear two-point correlation function (2PCF) along with a deep understanding of systematics that affect it. In this work, we demonstrate a general framework for detecting and modell ... Full text Cite

Clustering of red sequence galaxies in the fourth data release of the Kilo-Degree Survey

Journal Article Astronomy and Astrophysics · July 1, 2023 We present a sample of luminous red sequence galaxies as the basis for a study of the large-scale structure in the fourth data release of the Kilo-Degree Survey. The selected galaxies are defined by a red sequence template, in the form of a data-driven mod ... Full text Cite

Impact of point spread function higher moments error on weak gravitational lensing - II. A comprehensive study

Journal Article Monthly Notices of the Royal Astronomical Society · April 1, 2023 Weak lensing is one of the most powerful probes for dark matter and dark energy science, although it faces increasing challenges in controlling systematic uncertainties as the statistical errors become smaller. The point spread function (PSF) needs to be p ... Full text Cite

Consistent lensing and clustering in a low-S8Universe with BOSS, des Year 3, HSC Year 1, and KiDS-1000

Journal Article Monthly Notices of the Royal Astronomical Society · January 1, 2023 We evaluate the consistency between lensing and clustering based on measurements from Baryon Oscillation Spectroscopic Survey combined with galaxy-galaxy lensing from Dark Energy Survey (DES) Year 3, Hyper Suprime-Cam Subaru Strategic Program (HSC) Year 1, ... Full text Cite

PSFS OF COADDED IMAGES

Journal Article Open Journal of Astrophysics · January 1, 2023 We provide a detailed exploration of the connection between choice of coaddition schemes and the point-spread function (PSF) of the resulting coadded images. In particular, we investigate what properties of the coaddition algorithm lead to the final coadde ... Full text Cite

DES Y3 + KIDS-1000: CONSISTENT COSMOLOGY COMBINING COSMIC SHEAR SURVEYS

Journal Article Open Journal of Astrophysics · January 1, 2023 We present a joint cosmic shear analysis of the Dark Energy Survey (DES Y3) and the Kilo-Degree Survey (KiDS-1000) in a collaborative effort between the two survey teams. We find consistent cosmological parameter constraints between DES Y3 and KiDS-1000 wh ... Full text Cite

KiDS-1000: Cosmic shear with enhanced redshift calibration

Journal Article Astronomy and Astrophysics · August 1, 2022 We present a cosmic shear analysis with an improved redshift calibration for the fourth data release of the Kilo-Degree Survey (KiDS-1000) using self-organising maps (SOMs). Compared to the previous analysis of the KiDS-1000 data, we expand the redshift ca ... Full text Cite

The three-year shear catalog of the Subaru Hyper Suprime-Cam SSP Survey

Journal Article Publications of the Astronomical Society of Japan · April 1, 2022 We present the galaxy shear catalog that will be used for the three-year cosmological weak gravitational lensing analyses using data from the Wide layer of the Hyper Suprime-Cam (HSC) Subaru Strategic Program (SSP) Survey. The galaxy shapes are measured fr ... Full text Cite

Joint constraints on cosmology and the impact of baryon feedback: Combining KiDS-1000 lensing with the thermal Sunyaeva- Zeldovich effect from Planck and ACT

Journal Article Astronomy and Astrophysics · April 1, 2022 We conduct a pseudo-analysis of the tomographic cross-correlation between 1000 deg2 of weak-lensing data from the Kilo-Degree Survey (KiDS-1000) and the thermal Sunyaeva- Zeldovich (tSZ) effect measured by Planck and the Atacama Cosmology Telescope (ACT). ... Full text Cite

Lensing without borders - I. A blind comparison of the amplitude of galaxy-galaxy lensing between independent imaging surveys

Journal Article Monthly Notices of the Royal Astronomical Society · March 1, 2022 Lensing without borders is a cross-survey collaboration created to assess the consistency of galaxy-galaxy lensing signals (Δς) across different data sets and to carry out end-to-end tests of systematic errors. We perform a blind comparison of the amplitud ... Full text Cite

Impact of point spread function higher moments error on weak gravitational lensing

Journal Article Monthly Notices of the Royal Astronomical Society · February 1, 2022 Weak gravitational lensing is one of the most powerful tools for cosmology, while subject to challenges in quantifying subtle systematic biases. The point spread function (PSF) can cause biases in weak lensing shear inference when the PSF model does not ma ... Full text Cite

Faro: A framework for measuring the scientific performance of petascale Rubin Observatory data products

Conference Proceedings of SPIE the International Society for Optical Engineering · January 1, 2022 The Vera C. Rubin Observatory will advance many areas of astronomy over the next decade with its unique widefast-deep multi-color imaging survey, the Legacy Survey of Space and Time (LSST).1 The LSST will produce approximately 20TB of raw data per night, w ... Full text Cite

Geometry versus growth: Internal consistency of the flat ΛCDM model with KiDS-1000

Journal Article Astronomy and Astrophysics · November 1, 2021 We carry out a multi-probe self-consistency test of the flat Lambda Cold Dark Matter (ΛCDM) model with the aim of exploring potential causes of the reported tensions between high- A nd low-redshift cosmological observations. We divide the model into two th ... Full text Cite

KiDS-1000: Constraints on the intrinsic alignment of luminous red galaxies

Journal Article Astronomy and Astrophysics · October 1, 2021 We constrain the luminosity and redshift dependence of the intrinsic alignment (IA) of a nearly volume-limited sample of luminous red galaxies selected from the fourth public data release of the Kilo-Degree Survey (KiDS-1000). To measure the shapes of the ... Full text Cite

Bright galaxy sample in the Kilo-Degree Survey Data Release 4: Selection, photometric redshifts, and physical properties

Journal Article Astronomy and Astrophysics · September 1, 2021 We present a bright galaxy sample with accurate and precise photometric redshifts (photo-zs), selected using ugriZYJHKs photometry from the Kilo-Degree Survey (KiDS) Data Release 4. The highly pure and complete dataset is flux-limited at r < 20 mag, covers ... Full text Cite

Probing galaxy bias and intergalactic gas pressure with KiDS Galaxies-tSZ-CMB lensing cross-correlations

Journal Article Astronomy and Astrophysics · July 1, 2021 We constrain the redshift dependence of gas pressure bias { byPe»(bias-weighted average electron pressure), which characterises the thermodynamics of intergalactic gas, through a combination of cross-correlations between galaxy positions and the thermal Su ... Full text Cite

The weak lensing radial acceleration relation: Constraining modified gravity and cold dark matter theories with KiDS-1000

Journal Article Astronomy and Astrophysics · June 1, 2021 We present measurements of the radial gravitational acceleration around isolated galaxies, comparing the expected gravitational acceleration given the baryonic matter (gbar) with the observed gravitational acceleration (gobs), using weak lensing measuremen ... Full text Cite

KiDS-1000 Cosmology: Constraints beyond flat ΛcDM

Journal Article Astronomy and Astrophysics · May 1, 2021 We present constraints on extensions to the standard cosmological model of a spatially flat Universe governed by general relativity, a cosmological constant (Λ), and cold dark matter (CDM) by varying the spatial curvature ωK, the sum of the neutrino masses ... Full text Cite

Strong detection of the CMB lensing and galaxy weak lensing cross-correlation from ACT-DR4, Planck Legacy, and KiDS-1000

Journal Article Astronomy and Astrophysics · May 1, 2021 We measured the cross-correlation between galaxy weak lensing data from the Kilo Degree Survey (KiDS-1000, DR4) and cosmic microwave background (CMB) lensing data from the Atacama Cosmology Telescope (ACT, DR4) and the Planck Legacy survey. We used two sam ... Full text Cite

Photometric selection and redshifts for quasars in the Kilo-Degree Survey Data Release 4

Journal Article Astronomy and Astrophysics · May 1, 2021 We present a catalog of quasars with their corresponding redshifts derived from the photometric Kilo-Degree Survey (KiDS) Data Release 4. We achieved it by training machine learning (ML) models, using optical ugri and near-infrared ZYJHKs bands, on objects ... Full text Cite

Mitigating the effects of undersampling in weak lensing shear estimation with metacalibration

Journal Article Monthly Notices of the Royal Astronomical Society · April 1, 2021 metacalibration is a state-of-the-art technique for measuring weak gravitational lensing shear from well-sampled galaxy images. We investigate the accuracy of shear measured with metacalibration from fitting elliptical Gaussians to undersampled galaxy imag ... Full text Cite

Halo shapes constrained from a pure sample of central galaxies in KiDS-1000

Journal Article Astronomy and Astrophysics · March 1, 2021 We present measurements of fh, the ratio of the aligned components of the projected halo and galaxy ellipticities, for a sample of central galaxies using weak gravitational lensing data from the Kilo-Degree Survey (KiDS). Using a lens galaxy shape estimati ... Full text Cite

KiDS-1000 catalogue: Redshift distributions and their calibration

Journal Article Astronomy and Astrophysics · March 1, 2021 We present redshift distribution estimates of galaxies selected from the fourth data release of the Kilo-Degree Survey over an area of 1000 deg2 (KiDS-1000). These redshift distributions represent one of the crucial ingredients for weak gravitational lensi ... Full text Cite

Accounting for object detection bias in weak gravitational lensing studies

Journal Article Astronomy and Astrophysics · February 1, 2021 Featured Publication Weak lensing by large-scale structure is a powerful probe of cosmology if the apparent alignments in the shapes of distant galaxies can be accurately measured. Most studies have therefore focused on improving the fidelity of the shape measurements themselv ... Full text Cite

KiDS+VIKING-450: An internal-consistency test for cosmic shear tomography with a colour-based split of source galaxies

Journal Article Astronomy and Astrophysics · February 1, 2021 We performed an internal-consistency test of the KiDS+VIKING-450 (KV450) cosmic shear analysis with a colour-based split of source galaxies. Utilising the same measurements and calibrations for both sub-samples, we inspected the characteristics of the shea ... Full text Cite

KiDS-1000 Cosmology: Multi-probe weak gravitational lensing and spectroscopic galaxy clustering constraints

Journal Article Astronomy and Astrophysics · February 1, 2021 We present a joint cosmological analysis of weak gravitational lensing observations from the Kilo-Degree Survey (KiDS-1000), with redshift-space galaxy clustering observations from the Baryon Oscillation Spectroscopic Survey (BOSS) and galaxy-galaxy lensin ... Full text Cite

Tightening weak lensing constraints on the ellipticity of galaxy-scale dark matter haloes

Journal Article Astronomy and Astrophysics · February 1, 2021 Cosmological simulations predict that galaxies are embedded into triaxial dark matter haloes, which appear approximately elliptical in projection. Weak gravitational lensing allows us to constrain these halo shapes and thereby test the nature of dark matte ... Full text Cite

KiDS-1000 methodology: Modelling and inference for joint weak gravitational lensing and spectroscopic galaxy clustering analysis

Journal Article Astronomy and Astrophysics · February 1, 2021 We present the methodology for a joint cosmological analysis of weak gravitational lensing from the fourth data release of the ESO Kilo-Degree Survey (KiDS-1000) and galaxy clustering from the partially overlapping Baryon Oscillation Spectroscopic Survey ( ... Full text Cite

KiDS-1000 catalogue: Weak gravitational lensing shear measurements

Journal Article Astronomy and Astrophysics · January 1, 2021 We present weak lensing shear catalogues from the fourth data release of the Kilo-Degree Survey, KiDS-1000, spanning 1006 square degrees of deep and high-resolution imaging. Our 'gold-sample' of galaxies, with well-calibrated photometric redshift distribut ... Full text Cite

KiDS-1000 cosmology: Cosmic shear constraints and comparison between two point statistics

Journal Article Astronomy and Astrophysics · January 1, 2021 We present cosmological constraints from a cosmic shear analysis of the fourth data release of the Kilo-Degree Survey (KiDS-1000), which doubles the survey area with nine-band optical and near-infrared photometry with respect to previous KiDS analyses. Ado ... Full text Cite

KiDS-1000 Cosmology: constraints beyond flat $Λ$CDM

Preprint · October 30, 2020 Featured Publication Link to item Cite

KiDS+GAMA: The weak lensing calibrated stellar-to-halo mass relation of central and satellite galaxies

Journal Article Astronomy and Astrophysics · October 1, 2020 We simultaneously present constraints on the stellar-to-halo mass relation for central and satellite galaxies through a weak lensing analysis of spectroscopically classified galaxies. Using overlapping data from the fourth data release of the Kilo-Degree S ... Full text Cite

Testing gravity using galaxy-galaxy lensing and clustering amplitudes in KiDS-1000, BOSS, and 2dFLenS

Journal Article Astronomy and Astrophysics · October 1, 2020 The physics of gravity on cosmological scales affects both the rate of assembly of large-scale structure and the gravitational lensing of background light through this cosmic web. By comparing the amplitude of these different observational signatures, we c ... Full text Cite

KiDS+VIKING-450: Improved cosmological parameter constraints from redshift calibration with self-organising maps

Journal Article Astronomy and Astrophysics · August 1, 2020 We present updated cosmological constraints for the KiDS+VIKING-450 cosmic shear data set (KV450) estimated through redshift distributions and photometric samples defined using self-organising maps (SOMs). Our fiducial analysis finds marginal posterior con ... Full text Cite

KiDS+VIKING+GAMA: Testing semi-analytic models of galaxy evolution with galaxy-galaxy-galaxy lensing

Journal Article Astronomy and Astrophysics · August 1, 2020 Context. Several semi-analytic models (SAMs) try to explain how galaxies form, evolve, and interact inside the dark matter large-scale structure. These SAMs can be tested by comparing their predictions for galaxy-galaxy-galaxy lensing (G3L), which is weak ... Full text Cite

Erratum: Euclid preparation: VI. Verifying the Performance of Cosmic Shear Experiments (A&A (2020) 635 A139 DOI: 10.1051/0004-6361/201936980)

Journal Article Astronomy and Astrophysics · June 1, 2020 Authors Lacasa, Martinelli, Pourtsidou, Tutusaus, were inadvertently missed from the original authorship list. This is now corrected. ... Full text Cite

KiDS+VIKING-450 and DES-Y1 combined: Cosmology with cosmic shear

Journal Article Astronomy and Astrophysics · June 1, 2020 We present a combined tomographic weak gravitational lensing analysis of the Kilo Degree Survey (KV450) and the Dark Energy Survey (DES-Y1). We homogenize the analysis of these two public cosmic shear datasets by adopting consistent priors and modeling of ... Full text Cite

KiDS+VIKING-450 and DES-Y1 combined: Mitigating baryon feedback uncertainty with COSEBIs

Journal Article Astronomy and Astrophysics · February 1, 2020 We present cosmological constraints from a joint cosmic shear analysis of the Kilo-Degree Survey (KV450) and the Dark Energy Survey (DES-Y1), which were conducted using Complete Orthogonal Sets of E/B-Integrals (COSEBIs). With COSEBIs, we isolated any B-mo ... Full text Cite

Euclid preparation

Journal Article Astronomy and Astrophysics · January 1, 2020 Aims. Our aim is to quantify the impact of systematic effects on the inference of cosmological parameters from cosmic shear. Methods. We present an "end-to-end" approach that introduces sources of bias in a modelled weak lensing survey on a galaxy-by-galax ... Full text Cite

A gravitational lensing detection of filamentary structures connecting luminous red galaxies

Journal Article Astronomy and Astrophysics · January 1, 2020 We present a weak lensing detection of filamentary structures in the cosmic web, combining data from the Kilo-Degree Survey, the Red Cluster Sequence Lensing Survey, and the Canada-France-Hawaii Telescope Lensing Survey. The line connecting luminous red ga ... Full text Cite

Cosmology from large-scale structure: Constraining ΛcDM with BOSS

Journal Article Astronomy and Astrophysics · January 1, 2020 We reanalyse the anisotropic galaxy clustering measurement from the Baryon Oscillation Spectroscopic Survey (BOSS), demonstrating that using the full shape information provides cosmological constraints that are comparable to other low-redshift probes. We f ... Full text Cite

KiDS+VIKING-450: Cosmic shear tomography with optical and infrared data

Journal Article Astronomy and Astrophysics · January 1, 2020 We present a tomographic cosmic shear analysis of the Kilo-Degree Survey (KiDS) combined with the VISTA Kilo-Degree Infrared Galaxy Survey. This is the first time that a full optical to near-infrared data set has been used for a wide-field cosmological wea ... Full text Cite

Luminous red galaxies in the Kilo-Degree Survey: Selection with broad-band photometry and weak lensing measurements

Journal Article Monthly Notices of the Royal Astronomical Society · August 11, 2019 We use the overlap between multiband photometry of the Kilo-Degree Survey (KiDS) and spectroscopic data based on the Sloan Digital Sky Survey and Galaxy And Mass Assembly to infer the colour-magnitude relation of red-sequence galaxies. We then use this inf ... Full text Cite

Towards emulating cosmic shear data: Revisiting the calibration of the shear measurements for the Kilo-Degree Survey

Journal Article Astronomy and Astrophysics · April 1, 2019 Exploiting the full statistical power of future cosmic shear surveys will necessitate improvements to the accuracy with which the gravitational lensing signal is measured. We present a framework for calibrating shear with image simulations that demonstrate ... Full text Cite

The dependence of intrinsic alignment of galaxies on wavelength using KiDS and GAMA

Journal Article Astronomy and Astrophysics · February 1, 2019 The outer regions of galaxies are more susceptible to the tidal interactions that lead to intrinsic alignments of galaxies. The resulting alignment signal may therefore depend on the passband if the colours of galaxies vary spatially. To quantify this, we ... Full text Cite

Cosmological simulations for combined-probe analyses: Covariance and neighbour-exclusion bias

Journal Article Monthly Notices of the Royal Astronomical Society · November 1, 2018 We present a public suite of weak-lensing mock data, extending the Scinet Light Cone Simulations (SLICS) to simulate cross-correlation analyses with different cosmological probes. These mocks include Kilo Degree Survey (KiDS)-450-and LSST-like lensing data ... Full text Cite

KiDS-i-800: Comparing weak gravitational lensing measurements from same-sky surveys

Journal Article Monthly Notices of the Royal Astronomical Society · July 11, 2018 We present a weak gravitational lensing analysis of 815 deg2 of i-band imaging from the Kilo-Degree Survey (KiDS-i-800). In contrast to the deep r-band observations, which take priority during excellent seeing conditions and form the primary KiD ... Full text Cite

The effect of detector nonlinearity on WFIRST PSF profiles for weak gravitational lensing measurements

Journal Article Publications of the Astronomical Society of the Pacific · October 1, 2016 Weak gravitational lensing (WL) is one of the most powerful techniques to learn about the dark sector of the universe. To extract the WL signal from astronomical observations, galaxy shapes must be measured and corrected for the point-spread function (PSF) ... Full text Cite

The impact of interpixel capacitance in CMOS detectors on PSF shapes and implications for WFIRST

Journal Article Publications of the Astronomical Society of the Pacific · September 1, 2016 Unlike optical CCDs, near-infrared detectors, which are based on CMOS hybrid readout technology, typically suffer from electrical crosstalk between the pixels. The interpixel capacitance (IPC) responsible for the crosstalk affects the point-spread function ... Full text Cite

Persistent entanglement in a class of eigenstates of quantum Heisenberg spin glasses

Journal Article Epl · September 1, 2016 The eigenstates of a quantum spin glass Hamiltonian with long-range interaction are examined from the point of view of localisation and entanglement. In particular, low particle sectors are examined and an anomalous family of eigenstates is found that is m ... Full text Cite

The impact of cosmic variance on simulating weak lensing surveys

Journal Article Monthly Notices of the Royal Astronomical Society · March 21, 2015 Upcomingweak lensing surveyswill survey large cosmological volumes tomeasure the growth of cosmological structure with time and thereby constrain dark energy. One major systematic uncertainty in this process is the calibration of the weak lensing shape dis ... Full text Cite

The third gravitational lensing accuracy testing (GREAT3) challenge handbook

Journal Article Astrophysical Journal Supplement Series · January 1, 2014 The GRavitational lEnsing Accuracy Testing 3 (GREAT3) challenge is the third in a series of image analysis challenges, with a goal of testing and facilitating the development of methods for analyzing astronomical images that will be used to measure weak gr ... Full text Cite