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Wave effects in double-plane lensing


We discuss the wave optical effects in gravitational lens systems with two-point mass lenses in two different planes. We identify and vary parameters (i.e., lens masses, related distances and alignments) related to the lens system to investigate their effects on the amplification factor. We find that due to many parameters, it is not possible to make generalized statements regarding the amplification factor. The best approach for two-plane and multi-plane lensing is to study various possible lens systems case by case to explore the possibilities in the parameter space instead of hoping to generalize the results of a few test cases. We present a preliminary analysis of the parameter space for a two-lens system here.

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RR would like to thank the Department of Science and Technology, Government of India for being awarded the INSPIRE scholarship. AKM would like to thank the Council of Scientific and Industrial Research (CSIR) India for financial support through a research fellowship No. 524007. AKM also acknowledges financial support from the Ministry of Science and Technology, Israel. The authors acknowledge the use of the IISER Mohali HPC facility. They also would like to thank Kandaswamy Subramanian for his valuable comments on the manuscript. The authors thank the anonymous referees for insightful comments and constructive suggestions that have helped improve the quality of this work. This research has made use of NASA’s Astrophysics Data System Bibliographic Services.

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Correspondence to Jasjeet Singh Bagla.

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Ramesh, R., Meena, A.K. & Bagla, J.S. Wave effects in double-plane lensing. J Astrophys Astron 43, 38 (2022).

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  • Gravitational waves
  • microlensing
  • multi-plane lensing