Infrared constraints on the dark mass concentration observed in the cluster Abell 1942
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
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.Attached Files
Published - 325-1-111.pdf
Accepted Version - 0101431.pdf
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Additional details
- Eprint ID
- 103449
- Resolver ID
- CaltechAUTHORS:20200526-104631623
- Raymond and Beverly Sackler Foundation
- Canadian Cambridge Trust
- Natural Sciences and Engineering Research Council of Canada (NSERC)
- Created
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2020-05-27Created from EPrint's datestamp field
- Updated
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2021-11-16Created from EPrint's last_modified field