Nano-arcsecond Tomography of the Central Regions of the Quasar in SDSS J0924+0219
Abstract
SDSS J0924+0219 is the most anomalous quadruply lensed quasar known. Its close pair of images should have nearly equal brightness but differ by a factor of 14 in the optical and by over a factor of 30 in the X-rays. The source of the anomaly is unquestionably due to microlensing by stars in the intervening galaxy since the close pair of images has nearly the same brightness in the radio. Its other saddle point image is also anomalously demagnified, again due to microlensing. The reappearance of either image, which will occur at some point, will provide a once-in-Chandra's-lifetime opportunity to perform nano-arcsecond scale tomography of the central regions of a quasar.
- Publication:
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Chandra Proposal
- Pub Date:
- September 2022
- Bibcode:
- 2022cxo..prop.6367P
- Keywords:
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- Chandra Proposal ID #24700262