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Mid-Infrared Imaging of the Einstein Cross QSO

Published online by Cambridge University Press:  05 March 2013

Eric Agol ,
Stuart Wyithe ,
Barbara Jones  and
Chris Fluke
Eric Agol
Affiliation:
Caltech, MS 130-33, Pasadena, CA, 91125, USA; agol@tapir.caltech.edu
Stuart Wyithe
Affiliation:
School of Physics, University of Melbourne, Parkville, VIC 3052, Australia; swyithe@physics.unimelb.edu.au Princeton University Observatory, Peyton Hall, Princeton, NJ 08544
Barbara Jones
Affiliation:
Centre for Astrophysics and Space Sciences, University of California at San Diego, La Jolla, CA 92093, USA; b2jones@ucsd.edu
Chris Fluke
Affiliation:
Center for Astrophysics and Supercomputing, Mail number 31, Swinburne University of Technology, PO Box 218, Hawthorn, VIC 3122, Australia; cfluke@swin.edu.au
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Abstract

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Observations of the Einstein Cross QSO reveal that the mid-infrared region is unaffected by microlensing. Thus, the infrared emission region must be extended on a scale >1017 cm, ruling out synchrotron models, but consistent with dust emission models. Other constraints rule out starburst models. The flux ratios greatly constrain the lens model.

Keywords

quasars: individual(Q2237+0305);gravitational lensing;radiation mechanisms:generalinfrared: general
Type
Research Article
Information
Publications of the Astronomical Society of Australia , Volume 18 , Issue 2 , 2001 , pp. 166 - 168
Copyright
Copyright © Astronomical Society of Australia 2001

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