| Issue |
A&A
Volume 390, Number 1, July IV 2002
|
|
|---|---|---|
| Page(s) | L11 - L14 | |
| Section | Letters | |
| DOI | https://doi.org/10.1051/0004-6361:20020891 | |
| Published online | 05 July 2002 | |
Letter to the Editor
Images for a binary gravitational lens from a single real algebraic equation
Faculty of Science and Technology, Hirosaki University, Hirosaki 036-8561, Japan
Corresponding author: asada@phys.hirosaki-u.ac.jp
Received:
2
May
2002
Accepted:
11
June
2002
It is shown that the lens equation for a binary gravitational lens being a set of two coupled real fifth-order algebraic equations (equivalent to a single complex equation of the same order) can be reduced to a single real fifth-order algebraic equation, which provides a much simpler way to study lensing by binary objects.
Key words: gravitational lensing / binaries: general / planetary systems
© ESO, 2002
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