Permanent URL to this publication: http://dx.doi.org/10.5167/uzh-48285
Saha, P; Williams, L L R (2011). Understanding micro-image configurations in quasar microlensing. Monthly Notices of the Royal Astronomical Society, 411(3):1671-1677.
View at publisher
The micro-arcsecond scale structure of the seemingly point-like images in lensed quasars, though unobservable, is nevertheless much studied theoretically, because it affects the observable (or macro) brightness, and through that provides clues to substructure in both source and lens. A curious feature is that, while an observable macro-image is made up of a very large number of micro-images, the macro flux is dominated by a few micro-images. Micro minima play a key role, and the well-known broad distribution of macro magnification can be decomposed into narrower distributions with 0, 1, 2, 3, … micro minima. This paper shows how the dominant micro-images exist alongside the others, using the ideas of Fermat's principle and arrival-time surfaces, alongside simulations.
21 downloads since deposited on 18 Feb 2012
9 downloads since 12 months
|Item Type:||Journal Article, refereed, original work|
|Communities & Collections:||07 Faculty of Science > Institute for Computational Science|
|Dewey Decimal Classification:||530 Physics|
|Deposited On:||18 Feb 2012 20:33|
|Last Modified:||02 Dec 2013 16:28|
|ISSN:||0035-8711 (P) 1365-2966 (E)|
|Additional Information:||The definitive version is available at www3.interscience.wiley.com]|
Users (please log in): suggest update or correction for this item
Repository Staff Only: item control page