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

• Дата: 2012
• Автори: Alexandrov, A.N., Koval, S.M., Zhdanov, V.I.
• Формат: Стаття
• Мова: English
• Опубліковано: Головна астрономічна обсерваторія НАН України 2012
• Назва видання: Advances in Astronomy and Space Physics
• Онлайн доступ: http://dspace.nbuv.gov.ua/handle/123456789/119397
• Назва журналу: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Цитувати: 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.

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 cl...