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Robust strong lensing time delay estimation

Title
Robust strong lensing time delay estimation
Authors
Hojjati A.Kim A.G.Linder E.V.
Ewha Authors
Eric V. Linder
Issue Date
2013
Journal Title
Physical Review D - Particles, Fields, Gravitation and Cosmology
ISSN
1550-7998JCR Link
Citation
vol. 87, no. 12
Indexed
SCI; SCIE; SCOPUS WOS scopus
Abstract
Strong gravitational lensing of time variable sources such as quasars and supernovae creates observable time delays between the multiple images. Time delays can provide a powerful cosmographic probe through the "time-delay distance" involving the ratio of lens, source, and lens-source distances. However, light curves of lensed images have measurement gaps, noise, systematics such as microlensing from substructure along an image line of sight, and no a priori functional model, making robust time-delay estimation challenging. Using Gaussian process techniques, we demonstrate success in accurate blind reconstruction of time delays and reduction in uncertainties for real data. © 2013 American Physical Society.
DOI
10.1103/PhysRevD.87.123512
Appears in Collections:
자연과학대학 > 물리학전공 > Journal papers
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