CaltechAUTHORS
  A Caltech Library Service

Infrared constraints on the dark mass concentration observed in the cluster Abell 1942

Gray, Meghan E. and Ellis, Richard S. and Lewis, James R. and McMahon, Richard G. and Firth, Andrew E. (2001) Infrared constraints on the dark mass concentration observed in the cluster Abell 1942. Monthly Notices of the Royal Astronomical Society, 325 (1). pp. 111-118. ISSN 0035-8711. doi:10.1046/j.1365-8711.2001.04393.x. https://resolver.caltech.edu/CaltechAUTHORS:20200526-104631623

[img] PDF - Published Version
See Usage Policy.

973kB
[img] PDF - Accepted Version
See Usage Policy.

804kB

Use this Persistent URL to link to this item: https://resolver.caltech.edu/CaltechAUTHORS:20200526-104631623

Abstract

We present a deep H-band image of the region in the vicinity of the cluster Abell 1942 containing the puzzling dark matter concentration detected in an optical weak lensing study by Erben et al. We demonstrate that our limiting magnitude, H = 22, would be sufficient to detect clusters of appropriate mass out to redshifts comparable with the mean redshift of the background sources. Despite this, our infrared image reveals no obvious overdensity of sources at the location of the lensing mass peak, nor an excess of sources in the I−H versus H colour-magnitude diagram. We use this to constrain further the luminosity and mass-to-light ratio of the putative dark clump as a function of its redshift. We find that for spatially flat cosmologies, background lensing clusters with reasonable mass-to-light ratios lying in the redshift range 0<z<1 are strongly excluded, leaving open the possibility that the mass concentration is a new type of truly dark object.


Item Type:Article
Related URLs:
URLURL TypeDescription
https://doi.org/10.1046/j.1365-8711.2001.04393.xDOIArticle
https://ui.adsabs.harvard.edu/abs/2001MNRAS.325..111G/abstractADSArticle
https://arxiv.org/abs/astro-ph/0101431arXivDiscussion Paper
ORCID:
AuthorORCID
Ellis, Richard S.0000-0001-7782-7071
Additional Information:© 2001 RAS. Received: 26 January 2001. Accepted: 26 January 2001. Published: 11 July 2001. We thank Thomas Erben and Yannick Mellier for providing the UH8K I-band image of Abell 1942, and Alexandre Refregier for numerous helpful discussions. The Cambridge Infrared Survey Instrument is available thanks to the generous support of Raymond and Beverly Sackler. MEG acknowledges support from the Canadian Cambridge Trust and the Natural Sciences and Engineering Research Council of Canada.
Funders:
Funding AgencyGrant Number
Raymond and Beverly Sackler FoundationUNSPECIFIED
Canadian Cambridge TrustUNSPECIFIED
Natural Sciences and Engineering Research Council of Canada (NSERC)UNSPECIFIED
Subject Keywords:gravitational lensing, galaxies: clusters: individual: Abell 1942, dark matter, infrared: galaxies
Issue or Number:1
DOI:10.1046/j.1365-8711.2001.04393.x
Record Number:CaltechAUTHORS:20200526-104631623
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20200526-104631623
Official Citation:Meghan E. Gray, Richard S. Ellis, James R. Lewis, Richard G. McMahon, Andrew E. Firth, Infrared constraints on the dark mass concentration observed in the cluster Abell 1942, Monthly Notices of the Royal Astronomical Society, Volume 325, Issue 1, July 2001, Pages 111–118, https://doi.org/10.1046/j.1365-8711.2001.04393.x
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:103449
Collection:CaltechAUTHORS
Deposited By: Rebecca Minjarez
Deposited On:27 May 2020 16:00
Last Modified:16 Nov 2021 18:21

Repository Staff Only: item control page