Search Results - "King, Lindsay J"
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The impact of baryonic physics and massive neutrinos on weak lensing peak statistics
Published in Monthly notices of the Royal Astronomical Society (21-09-2019)“…ABSTRACT We study the impact of baryonic processes and massive neutrinos on weak lensing peak statistics that can be used to constrain cosmological parameters…”
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Mock weak lensing analysis of simulated galaxy clusters: bias and scatter in mass and concentration
Published in Monthly notices of the Royal Astronomical Society (01-04-2012)“…We quantify the bias and scatter in galaxy cluster masses M 200 and concentrations c derived from an idealized mock weak gravitational lensing (WL) survey, and…”
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A new look at massive clusters: weak lensing constraints on the triaxial dark matter haloes of A1689, A1835 and A2204
Published in Monthly notices of the Royal Astronomical Society (11-03-2009)“…Measuring the three-dimensional (3D) distribution of mass on galaxy cluster scales is a crucial test of the Λ cold dark matter (ΛCDM) model, providing…”
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A statistical study of weak lensing by triaxial dark matter haloes: consequences for parameter estimation
Published in Monthly notices of the Royal Astronomical Society (01-09-2007)“…Measuring the distribution of mass on galaxy cluster scales is a crucial test of the cold dark matter (CDM) model, providing constraints on the nature of dark…”
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The distribution of dark and luminous matter in the unique galaxy cluster merger Abell 2146
Published in Monthly notices of the Royal Astronomical Society (11-06-2016)“…Abell 2146 (z = 0.232) consists of two galaxy clusters undergoing a major merger. The system was discovered in previous work, where two large shock fronts were…”
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The impact of AGN feedback and baryonic cooling on galaxy clusters as gravitational lenses
Published in Monthly notices of the Royal Astronomical Society (21-07-2010)“…We investigate the impact of active galactic nucleus (AGN) feedback on the gravitational lensing properties of a sample of galaxy clusters with masses in the…”
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The mass-concentration relationship of virialized haloes and its impact on cosmological observables
Published in Monthly notices of the Royal Astronomical Society (01-10-2011)“…A generic property of the cuspy simulated virialized haloes in cold dark matter (CDM) cosmogenies is that their concentration is inversely correlated with…”
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The mass distribution of the unusual merging cluster Abell 2146 from strong lensing
Published in Monthly notices of the Royal Astronomical Society (11-01-2017)“…Abell 2146 consists of two galaxy clusters that have recently collided close to the plane of the sky, and it is unique in showing two large shocks on Chandra…”
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Probing the cosmic web: intercluster filament detection using gravitational lensing
Published in Monthly notices of the Royal Astronomical Society (01-02-2010)“…The problem of detecting dark matter filaments in the cosmic web is considered. Weak lensing is an ideal probe of dark matter, and therefore forms the basis of…”
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New constraints on the complex mass substructure in Abell 1689 from gravitational flexion
Published in Monthly notices of the Royal Astronomical Society (11-05-2011)“…In a recent publication, the flexion aperture mass statistic was found to provide a robust and effective method by which substructure in galaxy clusters might…”
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Testing metallicity indicators at z ∼ 1.4 with the gravitationally lensed galaxy CASSOWARY 20
Published in Monthly notices of the Royal Astronomical Society (11-05-2014)“…We present X-shooter observations of CASSOWARY 20 (CSWA 20), a star-forming (SFR ∼ 6 M yr−1) galaxy at z = 1.433, magnified by a factor of 11.5 by the…”
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Reducing distance errors for standard candles and standard sirens with weak-lensing shear and flexion maps
Published in Monthly notices of the Royal Astronomical Society (01-04-2011)“…Gravitational lensing induces significant errors in the measured distances to high-redshift standard candles and standard sirens such as Type Ia supernovae,…”
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A newly discovered DLA and associated Lyα emission in the spectra of the gravitationally lensed quasar UM 673A,B
Published in Monthly notices of the Royal Astronomical Society (01-12-2010)“…The sightline to the brighter member of the gravitationally lensed quasar pair UM 673A,B intersects a damped Lyα system (DLA) at z= 1.62650 which, because of…”
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A new tool to determine masses and mass profiles using gravitational flexion
Published in Monthly notices of the Royal Astronomical Society (01-07-2010)“…In a recent publication, an aperture mass statistic for gravitational flexion was derived and shown to be effective, at least with simulated data, in detecting…”
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15
Cosmology with the cluster mass function: mass estimators and shape systematics in large weak lensing surveys
Published in Monthly notices of the Royal Astronomical Society (11-06-2009)“…Accurate measurement of the cluster mass function is a crucial element in efforts to constrain structure formation models, the normalization of the matter…”
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An analytic ray-tracing algorithm for weak lensing
Published in Monthly notices of the Royal Astronomical Society (01-07-2011)“…We propose a new ray-tracing algorithm to measure the weak-lensing shear and convergence fields directly from N-body simulations. We calculate the deflection…”
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Detecting mass substructure in galaxy clusters: an aperture mass statistic for gravitational flexion
Published in Monthly notices of the Royal Astronomical Society (21-05-2009)“…Gravitational flexion has been introduced as a technique by which one can map out and study substructure in clusters of galaxies. Previous analyses involving…”
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An MCMC fitting method for triaxial dark matter haloes
Published in Monthly notices of the Royal Astronomical Society (01-11-2008)“…Measuring the 3D distribution of mass on galaxy cluster scales is a crucial test of the Λ cold dark matter (ΛCDM) model, providing constraints on the behaviour…”
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Probing galactic dark matter in dense environments: on the strong lensing efficiency of galaxies in rich clusters
Published in Monthly notices of the Royal Astronomical Society (21-11-2007)“…The recent detection by Limousin et al. of five new strong lensing events dominated by galaxy cluster members in Abell 1689, and outside the critical regime of…”
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Biases, selection effects and image multiplicities in the Jodrell Bank-VLA gravitational lens survey
Published in Monthly notices of the Royal Astronomical Society (01-09-1996)“…In this paper we discuss the biases and selection effects relevant to the Jodrell Bank-VLA gravitational lens survey (JVAS). We present a method for the…”
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