NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Caustic-induced features in microlensing magnification probability distributionsNumerical simulations have uncovered a previously unrecognized 'bump' in the macroimage magnification probabilities produced by a planar distribution of point masses. The result could be relevant to cases of microlensing by star fields in single galaxies, for which this lensing geometry is an excellent approximation. The bump is produced by bright pairs of microimages formed by sources lying near the caustics of the lens. The numerically calculated probabilities for the magnifications in the range between 3 and 30 are significantly higher than those given by the asymptotic relation derived by Schneider. The bump present in the two-dimensional lenses appears not to exist in the magnification probability distribution produced by a fully three-dimensional lens.
Document ID
19920040705
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Rauch, Kevin P.
(California Institute of Technology Pasadena, United States)
Mao, Shude
(NASA Headquarters Washington, DC United States)
Wambsganss, Joachim
(NASA Headquarters Washington, DC United States)
Paczynski, Bohdan
(Princeton University Observatory, NJ, United States)
Date Acquired
August 15, 2013
Publication Date
February 10, 1992
Publication Information
Publication: Astrophysical Journal, Part 1
Volume: 386
ISSN: 0004-637X
Subject Category
Astrophysics
Accession Number
92A23329
Funding Number(s)
CONTRACT_GRANT: NAGW-765
CONTRACT_GRANT: NSF AST-89-17765
CONTRACT_GRANT: NAGW-2448
Distribution Limits
Public
Copyright
Other

Available Downloads

There are no available downloads for this record.
No Preview Available