Mid-infrared imaging of the Einstein cross QSO

Agol, Eric; Wyithe, Stuart; Jones, Barbara; Fluke, Chris

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Mid-infrared imaging of the Einstein cross QSO

Date

2001

Authors

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 > 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.