Abstract
We argue that individual images in multiple-image QSOs could easily have substructure at the level of 0.1″ (i.e., unresolvable even with HST); microlensing within such substructure would cause centroid shifts, observable even from the ground as pseudo proper motions. We present a model of the four-image system 2237+0305 in which Image B shows such "improper motions" of order of 0.01″ over a few years.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 1471-1475 |
| Number of pages | 5 |
| Journal | Astronomical Journal |
| Volume | 110 |
| Issue number | 4 |
| DOIs | |
| State | Published - Oct 1995 |
| Externally published | Yes |