Gravitational lens equation: critical solutions and magnification near folds and cusps

dc.contributor.author	Alexandrov, A.N.
dc.contributor.author	Koval, S.M.
dc.contributor.author	Zhdanov, V.I.
dc.date.accessioned	2017-06-06T18:27:25Z
dc.date.available	2017-06-06T18:27:25Z
dc.date.issued	2012
dc.identifier.citation	Gravitational lens equation: critical solutions and magnification near folds and cusps / A.N. Alexandrov, S.M. Koval, V.I. Zhdanov // Advances in Astronomy and Space Physics. — 2012. — Т. 2., вип. 2. — С. 184-187. — Бібліогр.: 12 назв. — англ.	uk_UA
dc.identifier.issn	2227-1481
dc.identifier.uri	http://dspace.nbuv.gov.ua/handle/123456789/119397
dc.description.abstract	We study approximate solutions of the gravitational lens equation and corresponding lens magnification factor near the critical point. This consideration is based on the Taylor expansion of the lens potential in powers of coordinates and an introduction of a proximity parameter characterising the closeness of a point source to the caustic. Second-order corrections to known approximate solutions and magnification are found in case of a general fold point. The first-order corrections near a general cusp are found as well.	uk_UA
dc.language.iso	en	uk_UA
dc.publisher	Головна астрономічна обсерваторія НАН України	uk_UA
dc.relation.ispartof	Advances in Astronomy and Space Physics
dc.title	Gravitational lens equation: critical solutions and magnification near folds and cusps	uk_UA
dc.type	Article	uk_UA
dc.status	published earlier	uk_UA