Bright lenses and optical depth
Document Type
Article
Publication Date
1-1-1997
Abstract
In gravitational lensing, the concept of optical depth assumes that the lens is dark. Several microlensing detections have recently been made in which the lens may be bright. Relations are developed between apparent and absolute optical depth in the regime of the apparent and absolute brightness of the lens. An apparent optical depth through bright lenses is always less than the true, absolute optical depth. The greater the intrinsic brightness of the lens, the more likely that it will be found nearer the source. © 1997. The American Astronomical Society. All rights reserved.
Publication Title
Astrophysical Journal
Recommended Citation
Nemiroff, R.
(1997).
Bright lenses and optical depth.
Astrophysical Journal,
486(2 PART I), 693-696.
http://doi.org/10.1086/304555
Retrieved from: https://digitalcommons.mtu.edu/michigantech-p/9534