David Richard Harvey

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Related publications (27)

A detection of wobbling brightest cluster galaxies within massive galaxy clusters

Frédéric Courbin, Jean-Paul Richard Kneib, David Richard Harvey

A striking signal of dark matter beyond the standard model is the existence of cores in the centre of galaxy clusters. Recent simulations predict that a brightest cluster galaxy ( BCG) inside a cored galaxy cluster will exhibit residual wobbling due to pre ...

Oxford Univ Press2017

Systematic or signal? How dark matter misalignments can bias strong lensing models of galaxy clusters

Jean-Paul Richard Kneib, David Richard Harvey, Mathilde Jauzac

We explore how assuming that mass traces light in strong gravitational lensing models can lead to systematic errors in the predicted position of multiple images. Using a model based on the galaxy cluster MACS J0416 (z = 0.397) from the Hubble Frontier Fiel ...

Oxford Univ Press2016

The extraordinary amount of substructure in the Hubble Frontier Fields cluster Abell 2744

Johan Richard, Céline Tchernin, Jean-Paul Richard Kneib, Huanyuan Shan, Hakim Atek, Richard Massey, Markus Rexroth, David Richard Harvey, Mathilde Jauzac, Benjamin Yvan Alexandre Clement

We present a joint optical/X-ray analysis of the massive galaxy cluster Abell 2744 (z = 0.308). Our strong- and weak-lensing analysis within the central region of the cluster, i.e. at R < 1 Mpc from the brightest cluster galaxy, reveals eight substructures ...

Oxford Univ Press2016

The behaviour of dark matter associated with four bright cluster galaxies in the 10 kpc core of Abell 3827

Johan Richard, Richard Massey, David Richard Harvey, Mathilde Jauzac

Galaxy cluster Abell 3827 hosts the stellar remnants of four almost equally bright elliptical galaxies within a core of radius 10 kpc. Such corrugation of the stellar distribution is very rare, and suggests recent formation by several simultaneous mergers. ...

Oxford University Press2015

Hubble Frontier Fields: the geometry and dynamics of the massive galaxy cluster merger MACSJ0416.1-2403

Johan Richard, Jean-Paul Richard Kneib, Hakim Atek, Richard Massey, Markus Rexroth, David Richard Harvey, Mathilde Jauzac, Benjamin Yvan Alexandre Clement

We use a joint optical/X-ray analysis to constrain the geometry and history of the ongoing merging event in the massive galaxy cluster MACSJ0416.1-2403 (z = 0.397). Our investigation of cluster substructure rests primarily on a combined strong-and weak-len ...

Wiley-Blackwell2015

The nongravitational interactions of dark matter in colliding galaxy clusters

Richard Massey, David Richard Harvey

Collisions between galaxy clusters provide a test of the nongravitational forces acting on dark matter. Dark matter's lack of deceleration in the "bullet cluster" collision constrained its self-interaction cross section sigma(DM)/m

American Association for the Advancement of Science2015

A weak lensing comparability study of galaxy mergers that host AGNs

Frédéric Courbin, David Richard Harvey

We compared the total mass density profiles of three different types of galaxies using weak gravitational lensing: (i) 29 galaxies that host quasars at (z) over bar similar to 0.32 that are in a post-starburst quasar (PSQ) phase with high star formation in ...

Wiley-Blackwell2015

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