Learning from the scatter in type ia supernovae

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Type Ia Supernovae are standard candles so their mean apparent magnitude has been exploited to learn about the redshift-distance relationship. Besides intrinsic scatter in this standard candle, additional scatter is caused by gravitational magnification by large scale structure. Here they probe the dependence of this dispersion on cosmological parameters and show that information about the amplitude of clustering, {sigma}{sub s}, is contained in the scatter. In principle, it will be possible to constrain {sigma}{sub s} to within 5% with observations of 2000 Type Ia Supernovae. They identify three sources of systematic error--evolution of intrinsic scatter, baryon contributions to lensing, and ... continued below

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4 pages

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Dodelson, Scott; /Fermilab /Chicago U., Astron. Astrophys. Ctr.; Vallinotto, Alberto & U., /Fermilab /Chicago November 1, 2005.

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Type Ia Supernovae are standard candles so their mean apparent magnitude has been exploited to learn about the redshift-distance relationship. Besides intrinsic scatter in this standard candle, additional scatter is caused by gravitational magnification by large scale structure. Here they probe the dependence of this dispersion on cosmological parameters and show that information about the amplitude of clustering, {sigma}{sub s}, is contained in the scatter. In principle, it will be possible to constrain {sigma}{sub s} to within 5% with observations of 2000 Type Ia Supernovae. They identify three sources of systematic error--evolution of intrinsic scatter, baryon contributions to lensing, and non-Gaussianity of lensing--which will make this measurement difficult.

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4 pages

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  • Journal Name: Phys.Rev.D74:063515,2006

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  • Report No.: FERMILAB-PUB-06-026-A
  • Grant Number: AC02-76CH03000
  • DOI: 10.1103/PhysRevD.74.063515 | External Link
  • Office of Scientific & Technical Information Report Number: 892537
  • Archival Resource Key: ark:/67531/metadc874025

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  • November 1, 2005

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  • Sept. 21, 2016, 2:29 a.m.

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  • Nov. 29, 2016, 6:25 p.m.

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Dodelson, Scott; /Fermilab /Chicago U., Astron. Astrophys. Ctr.; Vallinotto, Alberto & U., /Fermilab /Chicago. Learning from the scatter in type ia supernovae, article, November 1, 2005; Batavia, Illinois. (digital.library.unt.edu/ark:/67531/metadc874025/: accessed September 18, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.