Cosmological parameters from lensed supernovae
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In this article, the authors investigate the possibility of measuring the Hubble constant, the fractional energy density components and the equation of state parameter of the "dark energy" using lensed multiple images of high-redshift supernovae.Abstract:
We investigate the possibility of measuring the Hubble constant, the fractional energy density components and the equation of state parameter of the "dark energy" using lensed multiple images of high-redshift supernovae. With future instruments, such as the SNAP and NGST satellites, it will become possible to observe several hundred lensed core-collapse supernovae with multiple images. Accurate measurements of the image separation, flux-ratio, time-delay and lensing foreground galaxy will provide complementary information to the cosmological tests based on, e.g., the magnitude-redshift relation of type Ia supernovae, especially with regards to the Hubble parameter that could be measured with a statistical uncertainty at the one percent level. Assuming a flat universe, the statistical uncertainty on the mass density is found to be stat M < 0:05. However, systematic eects from the uncertainty of the lens modeling are likely to dominate. E.g., if the lensing galaxies are extremely compact but are (erroneously) modeled as singular isothermal spheres, the mass density is biased by syst M 0:1. We argue that wide-field near-IR instruments such as the one proposed for the SNAP mission are critical for collecting large statistics of lensed supernovae.read more
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Gravitationally lensed quasars and supernovae in future wide-field optical imaging surveys
TL;DR: In this paper, the authors carried out a detailed calculation of the likely yields of several planned optical imaging surveys, using realistic distributions for the lens and source properties and taking magnification bias and image configuration detectability into account.
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Cosmological parameters from supernova observations: A critical comparison of three data sets
TL;DR: In this paper, Padmanabhan and Choudhury extended their previous analysis of cosmological supernova type Ia data to include three recent compilation of data sets.
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Cosmological parameters from supernova observations: A critical comparison of three data sets
TL;DR: In this article, Padmanabhan and Choudhury extended their previous analysis of cosmological supernova data to include three recent compilation of data sets, and a careful comparison of these different data sets help to draw the following conclusions: (i) All the data sets strongly rule out non-accelerating models.
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Dust and Extinction Curves in Galaxies with z>0: The Interstellar Medium of Gravitational Lens Galaxies
Emilio E. Falco,Chris Impey,Christopher S. Kochanek,Joseph Lehar,Brian McLeod,Hans-Walter Rix,Charles R. Keeton,J. A. Muñoz,Chien Y. Peng +8 more
TL;DR: In this paper, the authors determined 37 differential extinctions in 23 galaxies over the range 0 < z − l < 1, and only 7 of the 23 systems have spectral differences consistent with no differential extinction.
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iPTF16geu: A multiply imaged, gravitationally lensed type Ia supernova
Ariel Goobar,Rahman Amanullah,Shrinivas R. Kulkarni,Peter Nugent,Peter Nugent,Joel Johansson,Charles C. Steidel,David R. Law,Edvard Mörtsell,Robert M. Quimby,Robert M. Quimby,Nadejda Blagorodnova,Alexis Brandeker,Yi Cao,A. Cooray,R. Ferretti,Christoffer Fremling,L. Hangard,Mansi M. Kasliwal,Thomas Kupfer,Ragnhild Lunnan,Ragnhild Lunnan,Frank J. Masci,Adam A. Miller,Adam A. Miller,Hooshang Nayyeri,James D. Neill,Eran O. Ofek,S. Papadogiannakis,Tanja Petrushevska,Vikram Ravi,Jesper Sollerman,Mark Sullivan,Francesco Taddia,R. Walters,Donald A. Wilson,Lin Yan,Ofer Yaron +37 more
TL;DR: In this article, the authors reported the discovery of a multiply imaged, gravitationally lensed type Ia supernova, iPTF16geu (SN 2016geu), at redshift z = 0.409.
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