Mid-Infrared Imaging of the Einstein Cross QSO

Eric Agol , Stuart Wyithe, Barbara Jones, Omer Blaes, Chris Fluke, PASA, 18 (2), in press.
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Contents Page: Volume 18, Number 2

Mid-Infrared Imaging of the Einstein Cross QSO

Eric Agol 1,2
Stuart Wyithe3,4
Barbara Jones5
Omer Blaes6
Chris Fluke7

1 Chandra Fellow

2 Caltech, MS 130-33, Pasadena, CA, 91125, USA
agol@tapir.caltech.edu

3 School of Physics, University of Melbourne, Parkville, VIC 3052, Australia
swyithe@physics.unimelb.edu

4 Princeton University Observatory, Peyton Hall, Princeton, NJ 08544

5 Centre for Astrophysics and Space Sciences, University of California at San Diego, La Jolla, CA 92093, USA
b2jones@ucsd.edu

6 Physics Department, University of California, Santa Barbara, CA 93106, USA
blaes@gemini.physics.ucsb.edu

7 Center for Astrophysics and Supercomputing, Mail number 31, Swinburne University of Technology, PO Box 218, Hawthorn, VIC 3122, Australia
cfluke@swin.edu.au

Abstract:

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 > 1017cm, 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: general, infrared: general




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