The Dark Energy Survey Supernova Program: slow supernovae show cosmological time dilation out to z ∼ 1.

R. M.T. White; T. M. Davis; G. F. Lewis; D. Brout; L. Galbany; K. Glazebrook; S. R. Hinton; J. Lee; C. Lidman; A. Möller; M. Sako; D. Scolnic; M. Smith; M. Sullivan; B. O. Sánchez; P. Shah; M. Vincenzi; P. Wiseman; T. M.C. Abbott; M. Aguena; S. Allam; F. Andrade-Oliveira; J. Asorey; D. Bacon; S. Bocquet; D. Brooks; E. Buckley-Geer; D. L. Burke; A. Carnero Rosell; D. Carollo; J. Carretero; L. N. da Costa; M. E.S. Pereira; J. De Vicente; S. Desai; H. T. Diehl; S. Everett; I. Ferrero; B. Flaugher; J. Frieman; J. García-Bellido; E. Gaztanaga; G. Giannini; R. A. Gruendl; D. L. Hollowood; K. Honscheid; D. J. James; R. Kessler; K. Kuehn; O. Lahav; S. Lee; M. Lima; J. L. Marshall; J. Mena-Fernández; R. Miquel; J. Myles; R. C. Nichol; R. L.C. Ogando; A. Palmese; A. Pieres; A. A. Plazas Malagón; A. K. Romer; E. Sanchez; D. Sanchez Cid; M. Schubnell; E. Suchyta; G. Tarle; B. E. Tucker; A. R. Walker; N. Weaverdyck

doi:10.1093/mnras/stae2008

The Dark Energy Survey Supernova Program: slow supernovae show cosmological time dilation out to z ∼ 1.

R. M.T. White^*, T. M. Davis, G. F. Lewis, D. Brout, L. Galbany, K. Glazebrook, S. R. Hinton, J. Lee, C. Lidman, A. Möller, M. Sako, D. Scolnic, M. Smith, M. Sullivan, B. O. Sánchez, P. Shah, M. Vincenzi, P. Wiseman, T. M.C. Abbott, M. AguenaS. Allam, F. Andrade-Oliveira, J. Asorey, D. Bacon, S. Bocquet, D. Brooks, E. Buckley-Geer, D. L. Burke, A. Carnero Rosell, D. Carollo, J. Carretero, L. N. da Costa, M. E.S. Pereira, J. De Vicente, S. Desai, H. T. Diehl, S. Everett, I. Ferrero, B. Flaugher, J. Frieman, J. García-Bellido, E. Gaztanaga, G. Giannini, R. A. Gruendl, D. L. Hollowood, K. Honscheid, D. J. James, R. Kessler, K. Kuehn, O. Lahav, S. Lee, M. Lima, J. L. Marshall, J. Mena-Fernández, R. Miquel, J. Myles, R. C. Nichol, R. L.C. Ogando, A. Palmese, A. Pieres, A. A. Plazas Malagón, A. K. Romer, E. Sanchez, D. Sanchez Cid, M. Schubnell, E. Suchyta, G. Tarle, B. E. Tucker, A. R. Walker, N. Weaverdyck

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

1 Citation (Scopus)

Abstract

We present a precise measurement of cosmological time dilation using the light curves of 1504 Type Ia supernovae from the Dark Energy Survey spanning a redshift range 0.1 z 1.2. We find that the width of supernova light curves is proportional to (1 + z), as expected for time dilation due to the expansion of the Universe. Assuming Type Ia supernovae light curves are emitted with a consistent duration Δt_em, and parametrizing the observed duration as Δt_obs = Δt_em(1 + z)^b, we fit for the form of time dilation using two methods. First, we find that a power of b ≈ 1 minimizes the flux scatter in stacked subsamples of light curves across different redshifts. Secondly, we fit each target supernova to a stacked light curve (stacking all supernovae with observed bandpasses matching that of the target light curve) and find b = 1.003 ± 0.005 (stat) ± 0.010 (sys). Thanks to the large number of supernovae and large redshift-range of the sample, this analysis gives the most precise measurement of cosmological time dilation to date, ruling out any non-time-dilating cosmological models at very high significance.

Original language	English
Pages (from-to)	3365-3378
Number of pages	14
Journal	Monthly Notices of the Royal Astronomical Society
Volume	533
Issue number	3
DOIs	https://doi.org/10.1093/mnras/stae2008
Publication status	Published - 1 Sept 2024

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White, R. M. T., Davis, T. M., Lewis, G. F., Brout, D., Galbany, L., Glazebrook, K., Hinton, S. R., Lee, J., Lidman, C., Möller, A., Sako, M., Scolnic, D., Smith, M., Sullivan, M., Sánchez, B. O., Shah, P., Vincenzi, M., Wiseman, P., Abbott, T. M. C., ... Weaverdyck, N. (2024). The Dark Energy Survey Supernova Program: slow supernovae show cosmological time dilation out to z ∼ 1. Monthly Notices of the Royal Astronomical Society, 533(3), 3365-3378. https://doi.org/10.1093/mnras/stae2008

@article{c01fd75dfb314666a5aed5361ca55b8e,

title = "The Dark Energy Survey Supernova Program: slow supernovae show cosmological time dilation out to z ∼ 1.",

abstract = "We present a precise measurement of cosmological time dilation using the light curves of 1504 Type Ia supernovae from the Dark Energy Survey spanning a redshift range 0.1 z 1.2. We find that the width of supernova light curves is proportional to (1 + z), as expected for time dilation due to the expansion of the Universe. Assuming Type Ia supernovae light curves are emitted with a consistent duration Δtem, and parametrizing the observed duration as Δtobs = Δtem(1 + z)b, we fit for the form of time dilation using two methods. First, we find that a power of b ≈ 1 minimizes the flux scatter in stacked subsamples of light curves across different redshifts. Secondly, we fit each target supernova to a stacked light curve (stacking all supernovae with observed bandpasses matching that of the target light curve) and find b = 1.003 ± 0.005 (stat) ± 0.010 (sys). Thanks to the large number of supernovae and large redshift-range of the sample, this analysis gives the most precise measurement of cosmological time dilation to date, ruling out any non-time-dilating cosmological models at very high significance.",

keywords = "cosmology: observations, transients: supernovae",

author = "White, {R. M.T.} and Davis, {T. M.} and Lewis, {G. F.} and D. Brout and L. Galbany and K. Glazebrook and Hinton, {S. R.} and J. Lee and C. Lidman and A. M{\"o}ller and M. Sako and D. Scolnic and M. Smith and M. Sullivan and S{\'a}nchez, {B. O.} and P. Shah and M. Vincenzi and P. Wiseman and Abbott, {T. M.C.} and M. Aguena and S. Allam and F. Andrade-Oliveira and J. Asorey and D. Bacon and S. Bocquet and D. Brooks and E. Buckley-Geer and Burke, {D. L.} and {Carnero Rosell}, A. and D. Carollo and J. Carretero and {da Costa}, {L. N.} and Pereira, {M. E.S.} and {De Vicente}, J. and S. Desai and Diehl, {H. T.} and S. Everett and I. Ferrero and B. Flaugher and J. Frieman and J. Garc{\'i}a-Bellido and E. Gaztanaga and G. Giannini and Gruendl, {R. A.} and Hollowood, {D. L.} and K. Honscheid and James, {D. J.} and R. Kessler and K. Kuehn and O. Lahav and S. Lee and M. Lima and Marshall, {J. L.} and J. Mena-Fern{\'a}ndez and R. Miquel and J. Myles and Nichol, {R. C.} and Ogando, {R. L.C.} and A. Palmese and A. Pieres and {Plazas Malag{\'o}n}, {A. A.} and Romer, {A. K.} and E. Sanchez and {Sanchez Cid}, D. and M. Schubnell and E. Suchyta and G. Tarle and Tucker, {B. E.} and Walker, {A. R.} and N. Weaverdyck",

note = "Publisher Copyright: {\textcopyright} 2024 The Author(s).",

year = "2024",

month = sep,

day = "1",

doi = "10.1093/mnras/stae2008",

language = "English",

volume = "533",

pages = "3365--3378",

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

issn = "0035-8711",

publisher = "Oxford University Press ",

number = "3",

}

White, RMT, Davis, TM, Lewis, GF, Brout, D, Galbany, L, Glazebrook, K, Hinton, SR, Lee, J, Lidman, C, Möller, A, Sako, M, Scolnic, D, Smith, M, Sullivan, M, Sánchez, BO, Shah, P, Vincenzi, M, Wiseman, P, Abbott, TMC, Aguena, M, Allam, S, Andrade-Oliveira, F, Asorey, J, Bacon, D, Bocquet, S, Brooks, D, Buckley-Geer, E, Burke, DL, Carnero Rosell, A, Carollo, D, Carretero, J, da Costa, LN, Pereira, MES, De Vicente, J, Desai, S, Diehl, HT, Everett, S, Ferrero, I, Flaugher, B, Frieman, J, García-Bellido, J, Gaztanaga, E, Giannini, G, Gruendl, RA, Hollowood, DL, Honscheid, K, James, DJ, Kessler, R, Kuehn, K, Lahav, O, Lee, S, Lima, M, Marshall, JL, Mena-Fernández, J, Miquel, R, Myles, J, Nichol, RC, Ogando, RLC, Palmese, A, Pieres, A, Plazas Malagón, AA, Romer, AK, Sanchez, E, Sanchez Cid, D, Schubnell, M, Suchyta, E, Tarle, G, Tucker, BE, Walker, AR & Weaverdyck, N 2024, 'The Dark Energy Survey Supernova Program: slow supernovae show cosmological time dilation out to z ∼ 1.', Monthly Notices of the Royal Astronomical Society, vol. 533, no. 3, pp. 3365-3378. https://doi.org/10.1093/mnras/stae2008

TY - JOUR

T1 - The Dark Energy Survey Supernova Program

T2 - slow supernovae show cosmological time dilation out to z ∼ 1.

AU - White, R. M.T.

AU - Davis, T. M.

AU - Lewis, G. F.

AU - Brout, D.

AU - Galbany, L.

AU - Glazebrook, K.

AU - Hinton, S. R.

AU - Lee, J.

AU - Lidman, C.

AU - Möller, A.

AU - Sako, M.

AU - Scolnic, D.

AU - Smith, M.

AU - Sullivan, M.

AU - Sánchez, B. O.

AU - Shah, P.

AU - Vincenzi, M.

AU - Wiseman, P.

AU - Abbott, T. M.C.

AU - Aguena, M.

AU - Allam, S.

AU - Andrade-Oliveira, F.

AU - Asorey, J.

AU - Bacon, D.

AU - Bocquet, S.

AU - Brooks, D.

AU - Buckley-Geer, E.

AU - Burke, D. L.

AU - Carnero Rosell, A.

AU - Carollo, D.

AU - Carretero, J.

AU - da Costa, L. N.

AU - Pereira, M. E.S.

AU - De Vicente, J.

AU - Desai, S.

AU - Diehl, H. T.

AU - Everett, S.

AU - Ferrero, I.

AU - Flaugher, B.

AU - Frieman, J.

AU - García-Bellido, J.

AU - Gaztanaga, E.

AU - Giannini, G.

AU - Gruendl, R. A.

AU - Hollowood, D. L.

AU - Honscheid, K.

AU - James, D. J.

AU - Kessler, R.

AU - Kuehn, K.

AU - Lahav, O.

AU - Lee, S.

AU - Lima, M.

AU - Marshall, J. L.

AU - Mena-Fernández, J.

AU - Miquel, R.

AU - Myles, J.

AU - Nichol, R. C.

AU - Ogando, R. L.C.

AU - Palmese, A.

AU - Pieres, A.

AU - Plazas Malagón, A. A.

AU - Romer, A. K.

AU - Sanchez, E.

AU - Sanchez Cid, D.

AU - Schubnell, M.

AU - Suchyta, E.

AU - Tarle, G.

AU - Tucker, B. E.

AU - Walker, A. R.

AU - Weaverdyck, N.

PY - 2024/9/1

Y1 - 2024/9/1

N2 - We present a precise measurement of cosmological time dilation using the light curves of 1504 Type Ia supernovae from the Dark Energy Survey spanning a redshift range 0.1 z 1.2. We find that the width of supernova light curves is proportional to (1 + z), as expected for time dilation due to the expansion of the Universe. Assuming Type Ia supernovae light curves are emitted with a consistent duration Δtem, and parametrizing the observed duration as Δtobs = Δtem(1 + z)b, we fit for the form of time dilation using two methods. First, we find that a power of b ≈ 1 minimizes the flux scatter in stacked subsamples of light curves across different redshifts. Secondly, we fit each target supernova to a stacked light curve (stacking all supernovae with observed bandpasses matching that of the target light curve) and find b = 1.003 ± 0.005 (stat) ± 0.010 (sys). Thanks to the large number of supernovae and large redshift-range of the sample, this analysis gives the most precise measurement of cosmological time dilation to date, ruling out any non-time-dilating cosmological models at very high significance.

AB - We present a precise measurement of cosmological time dilation using the light curves of 1504 Type Ia supernovae from the Dark Energy Survey spanning a redshift range 0.1 z 1.2. We find that the width of supernova light curves is proportional to (1 + z), as expected for time dilation due to the expansion of the Universe. Assuming Type Ia supernovae light curves are emitted with a consistent duration Δtem, and parametrizing the observed duration as Δtobs = Δtem(1 + z)b, we fit for the form of time dilation using two methods. First, we find that a power of b ≈ 1 minimizes the flux scatter in stacked subsamples of light curves across different redshifts. Secondly, we fit each target supernova to a stacked light curve (stacking all supernovae with observed bandpasses matching that of the target light curve) and find b = 1.003 ± 0.005 (stat) ± 0.010 (sys). Thanks to the large number of supernovae and large redshift-range of the sample, this analysis gives the most precise measurement of cosmological time dilation to date, ruling out any non-time-dilating cosmological models at very high significance.

KW - cosmology: observations

KW - transients: supernovae

UR - http://www.scopus.com/inward/record.url?scp=85203244825&partnerID=8YFLogxK

U2 - 10.1093/mnras/stae2008

DO - 10.1093/mnras/stae2008

M3 - Article

AN - SCOPUS:85203244825

SN - 0035-8711

VL - 533

SP - 3365

EP - 3378

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

IS - 3

ER -

The Dark Energy Survey Supernova Program: slow supernovae show cosmological time dilation out to z ∼ 1.

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