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Gravitational Telescopes

Blandford, R. D. and Hogg, D. W. (1996) Gravitational Telescopes. In: Astrophysical Applications of Gravitational Lensing. IAU Symposium Proceedings Series. No.173. Kluwer , Dordrecht, pp. 355-364. ISBN 9780792339540.

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Some ways in which gravitational lenses can act as crude telescopes are reviewed. Magnification limits associated with finite source size, corrugation of the gravitational potential and finite wavelength are specified. It should be possible to obtain rotation curves for a small sample of ultra-faint galaxies imaged as giant arcs. There is an appreciable chance of eventually observing a radio jet component cross a caustic. The successful observation of microlensing in 2237+031 suggests that the continuum emission from this source at blue wavelengths is at least partly non-thermal. The maximum possible magnification observable, granted existing constraints is argued to be from γ-ray pulsars crossing caustic sheets formed by galaxies or a hypothetical population of intergalactic massive objects.

Item Type:Book Section
Related URLs:
URLURL TypeDescription ReadCube access
Blandford, R. D.0000-0002-1854-5506
Hogg, D. W.0000-0003-2866-9403
Additional Information:© 1996 IAU. We thank Rachel Webster and her colleagues for organizing an excellent meeting and for financial assistance. Helpful conversations with Ian Browne, Jordi Miralda-Escudé and Joachim Wambsganss are gratefully acknowledged. This research was supported by NSF contract AST93-23375.
Funding AgencyGrant Number
NSFAST 93-23375
Series Name:IAU Symposium Proceedings Series
Issue or Number:173
Record Number:CaltechAUTHORS:20181116-110732499
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Official Citation:Blandford, R., & Hogg, D. (1996). Gravitational Telescopes. Symposium - International Astronomical Union, 173, 355-364. doi:10.1017/S007418090023180X
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:90963
Deposited By: Tony Diaz
Deposited On:09 Mar 2020 14:56
Last Modified:11 May 2020 22:59

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