Abstract
Some subtle distinctions between optically thin emission and optically thick emission (with a dynamically passive source of opacity) from an emitting surface are drawn. It is noted that photons may escape a region of high optical depth by dragging the opaque material with them, and that optically thick emission can have a shorter scale of variation than optically thin emission and less light echoing.
| Original language | English |
|---|---|
| Article number | 15 |
| Journal | Astrophysical Journal |
| Volume | 909 |
| Issue number | 1 |
| DOIs | |
| State | Published - 1 Mar 2021 |
ASJC Scopus subject areas
- Astronomy and Astrophysics
- Space and Planetary Science