M. Jauzac
A weak lensing mass reconstruction of the large-scale filament feeding the massive galaxy cluster MACS J0717.5+3745
Jauzac, M.; Jullo, E.; Kneib, J.-P.; Ebeling, H.; Leauthaud, A.; Ma, C.-J.; Limousin, M.; Massey, R.; Richard, J.
Authors
E. Jullo
J.-P. Kneib
H. Ebeling
A. Leauthaud
C.-J. Ma
M. Limousin
Professor Richard Massey r.j.massey@durham.ac.uk
Professor
J. Richard
Abstract
We report the first weak lensing detection of a large-scale filament funnelling matter on to the core of the massive galaxy cluster MACS J0717.5+3745. Our analysis is based on a mosaic of 18 multipassband images obtained with the Advanced Camera for Surveys aboard the Hubble Space Telescope, covering an area of ∼10 × 20 arcmin2. We use a weak lensing pipeline developed for the Cosmic Evolution Survey, modified for the analysis of galaxy clusters, to produce a weak lensing catalogue. A mass map is then computed by applying a weak gravitational lensing multiscale reconstruction technique designed to describe irregular mass distributions such as the one investigated here. We test the resulting mass map by comparing the mass distribution inferred for the cluster core with the one derived from strong lensing constraints and find excellent agreement. Our analysis detects the MACS J0717.5+3745 filament within the 3σ detection contour of the lensing mass reconstruction, and underlines the importance of filaments for theoretical and numerical models of the mass distribution in the cosmic web. We measure the filament's projected length as ∼4.5 Graphic Mpc, and its mean density as (2.92 ± 0.66) × 108 h74 M⊙ kpc−2. Combined with the redshift distribution of galaxies obtained after an extensive spectroscopic follow-up in the area, we can rule out any projection effect resulting from the chance alignment on the sky of unrelated galaxy group-scale structures. Assuming plausible constraints concerning the structure's geometry based on its galaxy velocity field, we construct a three-dimensional (3D) model of the large-scale filament. Within this framework, we derive the 3D length of the filament to be 18 Graphic Mpc. The filament's deprojected density in terms of the critical density of the Universe is measured as (206 ± 46) ρcrit, a value that lies at the very high end of the range predicted by numerical simulations. Finally, we study the distribution of stellar mass in the field of MACS J0717.5+3749 and, adopting a mean mass-to-light ratio 〈M*/LK〉 of 0.73 ± 0.22 and assuming a Chabrier initial mass function, measure a stellar mass fraction along the filament of (0.9 ± 0.2) per cent, consistent with previous measurements in the vicinity of massive clusters.
Citation
Jauzac, M., Jullo, E., Kneib, J., Ebeling, H., Leauthaud, A., Ma, C., …Richard, J. (2012). A weak lensing mass reconstruction of the large-scale filament feeding the massive galaxy cluster MACS J0717.5+3745. Monthly Notices of the Royal Astronomical Society, 426(4), 3369-3384. https://doi.org/10.1111/j.1365-2966.2012.21966.x
Journal Article Type | Article |
---|---|
Publication Date | Nov 11, 2012 |
Deposit Date | Mar 21, 2013 |
Publicly Available Date | Feb 17, 2015 |
Journal | Monthly Notices of the Royal Astronomical Society |
Print ISSN | 0035-8711 |
Electronic ISSN | 1365-2966 |
Publisher | Royal Astronomical Society |
Peer Reviewed | Peer Reviewed |
Volume | 426 |
Issue | 4 |
Pages | 3369-3384 |
DOI | https://doi.org/10.1111/j.1365-2966.2012.21966.x |
Keywords | Gravitational lensing: weak, Galaxies: clusters: individual: MACS J0717.5+3745, Cosmology: observations, Large-scale structure of Universe. |
Files
Published Journal Article
(6.3 Mb)
PDF
Copyright Statement
This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©: 2013 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.
You might also like
Scanning for dark matter subhaloes in Hubble Space Telescope imaging of 54 strong lenses
(2023)
Journal Article
Data Downloaded via Parachute from a NASA Super-Pressure Balloon
(2023)
Journal Article
A Recent Impact Origin of Saturn’s Rings and Mid-sized Moons
(2023)
Journal Article
RXJ0437+00: constraining dark matter with exotic gravitational lenses
(2023)
Journal Article
Downloadable Citations
About Durham Research Online (DRO)
Administrator e-mail: dro.admin@durham.ac.uk
This application uses the following open-source libraries:
SheetJS Community Edition
Apache License Version 2.0 (http://www.apache.org/licenses/)
PDF.js
Apache License Version 2.0 (http://www.apache.org/licenses/)
Font Awesome
SIL OFL 1.1 (http://scripts.sil.org/OFL)
MIT License (http://opensource.org/licenses/mit-license.html)
CC BY 3.0 ( http://creativecommons.org/licenses/by/3.0/)
Powered by Worktribe © 2024
Advanced Search