Weak lensing of Type Ia Supernovae from the Dark Energy Survey

DES Collaboration

doi:10.1093/MNRAS/STAA1852

Weak lensing of Type Ia Supernovae from the Dark Energy Survey

DES Collaboration

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Abstract

We consider the effects of weak gravitational lensing on observations of 196 spectroscopically confirmed Type Ia Supernovae (SNe Ia) from years 1 to 3 of the Dark Energy Survey (DES).We simultaneously measure both the angular correlation function and the non-Gaussian skewness caused by weak lensing. This approach has the advantage of being insensitive to the intrinsic dispersion of SNe Ia magnitudes. We model the amplitude of both effects as a function of σ8, and find σ8 =1.2+0.9-0.8. We also apply our method to a subsample of 488 SNe from the Joint Light-curve Analysis (JLA; chosen to match the redshift range we use for this work), and find σ8 =0.8+1.1-0.7. The comparable uncertainty in σ8 between DES-SN and the larger number of SNe from JLA highlights the benefits of homogeneity of the DES-SN sample, and improvements in the calibration and data analysis.

Original language	English
Pages (from-to)	4051-4059
Number of pages	9
Journal	Monthly Notices of the Royal Astronomical Society
Volume	496
Issue number	3
DOIs	https://doi.org/10.1093/MNRAS/STAA1852
State	Published - 2020

Funding

Based in part on observations at Cerro Tololo Inter-American Observatory, National Optical Astronomy Observatory, which is operated by the Association of Universities for Research in Astronomy under a cooperative agreement with the National Science Foundation.

Funders	Funder number
National Science Foundation
Seventh Framework Programme	1138766, 240672, 306478, 291329
Seventh Framework Programme

Keywords

Cosmological parameters
Cosmology: Observations
Large-scale structure of the universe

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10.1093/MNRAS/STAA1852

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@article{cb3f23324cb14de299514d11b33e856f,

title = "Weak lensing of Type Ia Supernovae from the Dark Energy Survey",

abstract = "We consider the effects of weak gravitational lensing on observations of 196 spectroscopically confirmed Type Ia Supernovae (SNe Ia) from years 1 to 3 of the Dark Energy Survey (DES).We simultaneously measure both the angular correlation function and the non-Gaussian skewness caused by weak lensing. This approach has the advantage of being insensitive to the intrinsic dispersion of SNe Ia magnitudes. We model the amplitude of both effects as a function of σ8, and find σ8 =1.2+0.9-0.8. We also apply our method to a subsample of 488 SNe from the Joint Light-curve Analysis (JLA; chosen to match the redshift range we use for this work), and find σ8 =0.8+1.1-0.7. The comparable uncertainty in σ8 between DES-SN and the larger number of SNe from JLA highlights the benefits of homogeneity of the DES-SN sample, and improvements in the calibration and data analysis.",

keywords = "Cosmological parameters, Cosmology: Observations, Large-scale structure of the universe",

author = "{DES Collaboration} and E. MacAulay and D. Bacon and Nichol, {R. C.} and Davis, {T. M.} and J. Elvin-Poole and D. Brout and D. Carollo and K. Glazebrook and Hinton, {S. R.} and Lewis, {G. F.} and C. Lidman and A. M{\"o}ller and M. Sako and D. Scolnic and M. Smith and Sommer, {N. E.} and Tucker, {B. E.} and Abbott, {T. M.C.} and M. Aguena and J. Annis and S. Avila and E. Bertin and S. Bhargava and D. Brooks and Burke, {D. L.} and Rosell, {A. Carnero} and Kind, {M. Carrasco} and J. Carretero and Castander, {F. J.} and M. Costanzi and {Da Costa}, {L. N.D.} and S. Desai and Diehl, {H. T.} and P. Doel and B. Flaugher and Foley, {R. J.} and J. Garc{\'i}a-Bellido and E. Gaztanaga and Gerdes, {D. W.} and D. Gruen and Gruendl, {R. A.} and J. Gschwend and G. Gutierrez and Hollowood, {D. L.} and K. Honscheid and D. Huterer and James, {D. J.} and K. Kuehn and N. Kuropatkin and E. Suchyta",

year = "2020",

doi = "10.1093/MNRAS/STAA1852",

language = "English",

volume = "496",

pages = "4051--4059",

journal = "Monthly Notices of the Royal Astronomical Society",

issn = "0035-8711",

publisher = "Oxford University Press",

number = "3",

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TY - JOUR

T1 - Weak lensing of Type Ia Supernovae from the Dark Energy Survey

AU - DES Collaboration

AU - MacAulay, E.

AU - Bacon, D.

AU - Nichol, R. C.

AU - Davis, T. M.

AU - Elvin-Poole, J.

AU - Brout, D.

AU - Carollo, D.

AU - Glazebrook, K.

AU - Hinton, S. R.

AU - Lewis, G. F.

AU - Lidman, C.

AU - Möller, A.

AU - Sako, M.

AU - Scolnic, D.

AU - Smith, M.

AU - Sommer, N. E.

AU - Tucker, B. E.

AU - Abbott, T. M.C.

AU - Aguena, M.

AU - Annis, J.

AU - Avila, S.

AU - Bertin, E.

AU - Bhargava, S.

AU - Brooks, D.

AU - Burke, D. L.

AU - Rosell, A. Carnero

AU - Kind, M. Carrasco

AU - Carretero, J.

AU - Castander, F. J.

AU - Costanzi, M.

AU - Da Costa, L. N.D.

AU - Desai, S.

AU - Diehl, H. T.

AU - Doel, P.

AU - Flaugher, B.

AU - Foley, R. J.

AU - García-Bellido, J.

AU - Gaztanaga, E.

AU - Gerdes, D. W.

AU - Gruen, D.

AU - Gruendl, R. A.

AU - Gschwend, J.

AU - Gutierrez, G.

AU - Hollowood, D. L.

AU - Honscheid, K.

AU - Huterer, D.

AU - James, D. J.

AU - Kuehn, K.

AU - Kuropatkin, N.

AU - Suchyta, E.

PY - 2020

Y1 - 2020

N2 - We consider the effects of weak gravitational lensing on observations of 196 spectroscopically confirmed Type Ia Supernovae (SNe Ia) from years 1 to 3 of the Dark Energy Survey (DES).We simultaneously measure both the angular correlation function and the non-Gaussian skewness caused by weak lensing. This approach has the advantage of being insensitive to the intrinsic dispersion of SNe Ia magnitudes. We model the amplitude of both effects as a function of σ8, and find σ8 =1.2+0.9-0.8. We also apply our method to a subsample of 488 SNe from the Joint Light-curve Analysis (JLA; chosen to match the redshift range we use for this work), and find σ8 =0.8+1.1-0.7. The comparable uncertainty in σ8 between DES-SN and the larger number of SNe from JLA highlights the benefits of homogeneity of the DES-SN sample, and improvements in the calibration and data analysis.

AB - We consider the effects of weak gravitational lensing on observations of 196 spectroscopically confirmed Type Ia Supernovae (SNe Ia) from years 1 to 3 of the Dark Energy Survey (DES).We simultaneously measure both the angular correlation function and the non-Gaussian skewness caused by weak lensing. This approach has the advantage of being insensitive to the intrinsic dispersion of SNe Ia magnitudes. We model the amplitude of both effects as a function of σ8, and find σ8 =1.2+0.9-0.8. We also apply our method to a subsample of 488 SNe from the Joint Light-curve Analysis (JLA; chosen to match the redshift range we use for this work), and find σ8 =0.8+1.1-0.7. The comparable uncertainty in σ8 between DES-SN and the larger number of SNe from JLA highlights the benefits of homogeneity of the DES-SN sample, and improvements in the calibration and data analysis.

KW - Cosmological parameters

KW - Cosmology: Observations

KW - Large-scale structure of the universe

UR - http://www.scopus.com/inward/record.url?scp=85097816840&partnerID=8YFLogxK

U2 - 10.1093/MNRAS/STAA1852

DO - 10.1093/MNRAS/STAA1852

M3 - Review article

AN - SCOPUS:85097816840

SN - 0035-8711

VL - 496

SP - 4051

EP - 4059

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

IS - 3

ER -

Weak lensing of Type Ia Supernovae from the Dark Energy Survey

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