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Title:Supernovae seen through gravitational telescopes
Authors:Petrushevska, Tanja (Author)
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Language:English
Work type:Not categorized (r6)
Tipology:1.12 - Published Scientific Conference Contribution Abstract
Organization:UNG - University of Nova Gorica
Abstract:Galaxies, and clusters of galaxies, can act as gravitational lenses and magnify the light of objects behind them. The effect enables observations of very distant supernovae, that otherwise would be too faint to be detected by existing telescopes, and allows studies of the frequency and properties of these rare phenomena when the universe was young. Under the right circumstances, multiple images of the lensed supernovae can be observed, and due to the variable nature of the objects, the difference between the arrival times of the images can be measured. Since the images have taken different paths through space before reaching us, the time-differences are sensitive to the expansion rate of the universe. One class of supernovae, Type Ia, are of particular interest to detect. Their well known brightness can be used to determine the magnification, which can be used to understand the lensing systems. I will also report our discovery of the first resolved multiply-imaged gravitationally lensed supernova Type Ia.
Keywords:lensed supernovae, strong lensing
Year of publishing:2018
COBISS_ID:5147387 Link is opened in a new window
URN:URN:SI:UNG:REP:138J5CE1
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Record is a part of a monograph

Title:The Third Zeldovich Meeting
Conference organizer:International Center for Relativistic Astrophysics Network
Place of publishing:Minsk, Belarus
Year of publishing:2018

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