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Gravitational Lensing of High Redshift Sources

Barkana, Rennan and Hogg, David W. and Loeb, Abraham and Blandford, Roger (2000) Gravitational Lensing of High Redshift Sources. . (Unpublished)

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The combination of deep exposures and high resolution offered by telescopes in space allows the detection of lensing over a wide range of source redshifts and lens masses. As an example, we model a lens candidate found in the southern Hubble Deep Field. The system consists of a source galaxy lensed into an arc, 0."9 from an elliptical galaxy. The photometric redshift of 0.6 for the lens galaxy implies a mass-to-light ratio of 15 in solar units, out to three effective radii. This lens system may be a preview of the large number of lensed high-redshift galaxies that will be detected with the Next Generation Space Telescope (NGST). When NGST is launched in the next decade, some of the earliest galaxies and quasars in the Universe may be observed. Popular models of structure formation imply that at a given observed flux, roughly 3% of redshift > 5 sources are multiply imaged. Thus, NGST should detect several lensed objects in each field of view. In addition, NGST will be a valuable tool for weak lensing measurements, as long as it can resolve the background galaxies. We estimate the angular size distribution of high redshift sources within hierarchical models of structure formation and find that most will be resolved by NGST even at z > 10.

Item Type:Report or Paper (Discussion Paper)
Related URLs:
URLURL TypeDescription Paper
Hogg, David W.0000-0003-2866-9403
Loeb, Abraham0000-0003-4330-287X
Blandford, Roger0000-0002-1854-5506
Additional Information:The HDF-S was observed with the NASA/ESA Hubble Space Telescope, which is operated by AURA under NASA contract NAS 5-26555. Regarding the predictions for NGST, we are grateful to Zoltan Haiman for number count data, and to Tal Alexander and Amiel Sternberg for stellar population models. Barkana acknowledges support by Institute Funds. Loeb acknowledges NASA grants NAG 5-7039 and NAG 5-7768. Blandford acknowledges support by the Alfred P. Sloan Foundation during a stay at IAS. Hogg acknowledges Hubble Fellowship grant HF-01093.01-97A from STScI, which is operated by AURA under NASA contract NAS 5-26555.
Funding AgencyGrant Number
NASANAS 5-26555
NASANAG 5-7039
NASANAG 5-7768
Alfred P. Sloan FoundationUNSPECIFIED
NASA Hubble FellowshipHF-01093.01-97A
Record Number:CaltechAUTHORS:20190603-105903220
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:96036
Deposited By: Tony Diaz
Deposited On:03 Jun 2019 18:40
Last Modified:03 Oct 2019 21:19

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