Abstract
PG 1115+080 is a quadruply lensed quasar at z = 1.72 whose image positions are well fit by simple models of the lens galaxy (at z = 0.31). At optical wavelengths, the bright close pair of images exhibits a modest flux ratio anomaly (factors of ∼ 1.2-1.4 over the past 22 yr) with respect to these same models. We show here that as observed in X-rays with Chandra, the flux ratio anomaly is far more extreme, roughly a factor of 6. The contrasting flux ratio anomalies in the optical and X-ray band confirm the microlensing hypothesis and set a lower limit on the size of the optical continuum emission region that is ~10-100 times larger man expected from a thin accretion disk model.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 67-72 |
| Number of pages | 6 |
| Journal | Astrophysical Journal |
| Volume | 648 |
| Issue number | 1 I |
| DOIs | |
| State | Published - Sep 1 2006 |
Keywords
- Gravitational leasing
ASJC Scopus subject areas
- Astronomy and Astrophysics
- Space and Planetary Science
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Pooley, D., Blackburne, J. A., Rappaport, S., Schechter, P. L., & Fong, W. (2006). A strong X-ray flux ratio anomaly in the quadruply lensed quasar PG 1115+080. Astrophysical Journal, 648(1 I), 67-72. https://doi.org/10.1086/505860