Time dilation in type Ia supernova spectra at high redshift

S. Blondin; T. M. Davis; K. Krisciunas; B. P. Schmidt; J. Sollerman; W. M. Wood-Vasey; A. C. Becker; P. Challis; A. Clocchiatti; G. Damke; A. V. Filippenko; R. J. Foley; P. M. Garnavich; S. W. Jha; R. P. Kirshner; B. Leibundgut; W. Li; T. Matheson; G. Miknaitis; G. Narayan; G. Pignata; A. Rest; A. G. Riess; J. M. Silverman; R. C. Smith; J. Spyromilio; M. Stritzinger; C. W. Stubbs; N. B. Suntzeff; J. L. Tonry; B. E. Tucker; A. Zenteno

doi:10.1086/589568

Time dilation in type Ia supernova spectra at high redshift

S. Blondin^*, T. M. Davis, K. Krisciunas, B. P. Schmidt, J. Sollerman, W. M. Wood-Vasey, A. C. Becker, P. Challis, A. Clocchiatti, G. Damke, A. V. Filippenko, R. J. Foley, P. M. Garnavich, S. W. Jha, R. P. Kirshner, B. Leibundgut, W. Li, T. Matheson, G. Miknaitis, G. NarayanG. Pignata, A. Rest, A. G. Riess, J. M. Silverman, R. C. Smith, J. Spyromilio, M. Stritzinger, C. W. Stubbs, N. B. Suntzeff, J. L. Tonry, B. E. Tucker, A. Zenteno

^*Corresponding author for this work

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

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Abstract

We present multiepoch spectra of 13 high-redshift Type Ia supernovae (SNe Ia) drawn from the literature, the ESSENCE and SNLS projects, and our own separate dedicated program on the ESO Very Large Telescope. We use the Supernova Identification (SNID) code of Blondin and Tonry to determine the spectral ages in the supernova rest frame. Comparison with the observed elapsed time yields an apparent aging rate consistent with the 1 /(1 + z) factor (where z is the redshifi) expected in a homogeneous, isotropic, expanding universe. These measurements thus confirm the expansion hypothesis, while unambiguously excluding models that predict no time dilation, such as Zwicky's "tired light" hypothesis. We also test for power-law dependencies of the aging rate on redshift. The best-fit exponent for these models is consistent with the expected 1/(1 + z) factor.

Original language	English
Pages (from-to)	724-736
Number of pages	13
Journal	Astrophysical Journal
Volume	682
Issue number	2
DOIs	https://doi.org/10.1086/589568
Publication status	Published - 1 Aug 2008

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Blondin, S., Davis, T. M., Krisciunas, K., Schmidt, B. P., Sollerman, J., Wood-Vasey, W. M., Becker, A. C., Challis, P., Clocchiatti, A., Damke, G., Filippenko, A. V., Foley, R. J., Garnavich, P. M., Jha, S. W., Kirshner, R. P., Leibundgut, B., Li, W., Matheson, T., Miknaitis, G., ... Zenteno, A. (2008). Time dilation in type Ia supernova spectra at high redshift. Astrophysical Journal, 682(2), 724-736. https://doi.org/10.1086/589568

@article{aafd1ac32e1044eca4e0ea61a71717b5,

title = "Time dilation in type Ia supernova spectra at high redshift",

abstract = "We present multiepoch spectra of 13 high-redshift Type Ia supernovae (SNe Ia) drawn from the literature, the ESSENCE and SNLS projects, and our own separate dedicated program on the ESO Very Large Telescope. We use the Supernova Identification (SNID) code of Blondin and Tonry to determine the spectral ages in the supernova rest frame. Comparison with the observed elapsed time yields an apparent aging rate consistent with the 1 /(1 + z) factor (where z is the redshifi) expected in a homogeneous, isotropic, expanding universe. These measurements thus confirm the expansion hypothesis, while unambiguously excluding models that predict no time dilation, such as Zwicky's {"}tired light{"} hypothesis. We also test for power-law dependencies of the aging rate on redshift. The best-fit exponent for these models is consistent with the expected 1/(1 + z) factor.",

keywords = "Cosmology: miscellaneous, Supernovae: general",

author = "S. Blondin and Davis, {T. M.} and K. Krisciunas and Schmidt, {B. P.} and J. Sollerman and Wood-Vasey, {W. M.} and Becker, {A. C.} and P. Challis and A. Clocchiatti and G. Damke and Filippenko, {A. V.} and Foley, {R. J.} and Garnavich, {P. M.} and Jha, {S. W.} and Kirshner, {R. P.} and B. Leibundgut and W. Li and T. Matheson and G. Miknaitis and G. Narayan and G. Pignata and A. Rest and Riess, {A. G.} and Silverman, {J. M.} and Smith, {R. C.} and J. Spyromilio and M. Stritzinger and Stubbs, {C. W.} and Suntzeff, {N. B.} and Tonry, {J. L.} and Tucker, {B. E.} and A. Zenteno",

year = "2008",

month = aug,

day = "1",

doi = "10.1086/589568",

language = "English",

volume = "682",

pages = "724--736",

journal = "Astrophysical Journal",

issn = "0004-637X",

publisher = "American Astronomical Society",

number = "2",

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Blondin, S, Davis, TM, Krisciunas, K, Schmidt, BP, Sollerman, J, Wood-Vasey, WM, Becker, AC, Challis, P, Clocchiatti, A, Damke, G, Filippenko, AV, Foley, RJ, Garnavich, PM, Jha, SW, Kirshner, RP, Leibundgut, B, Li, W, Matheson, T, Miknaitis, G, Narayan, G, Pignata, G, Rest, A, Riess, AG, Silverman, JM, Smith, RC, Spyromilio, J, Stritzinger, M, Stubbs, CW, Suntzeff, NB, Tonry, JL, Tucker, BE & Zenteno, A 2008, 'Time dilation in type Ia supernova spectra at high redshift', Astrophysical Journal, vol. 682, no. 2, pp. 724-736. https://doi.org/10.1086/589568

TY - JOUR

T1 - Time dilation in type Ia supernova spectra at high redshift

AU - Blondin, S.

AU - Davis, T. M.

AU - Krisciunas, K.

AU - Schmidt, B. P.

AU - Sollerman, J.

AU - Wood-Vasey, W. M.

AU - Becker, A. C.

AU - Challis, P.

AU - Clocchiatti, A.

AU - Damke, G.

AU - Filippenko, A. V.

AU - Foley, R. J.

AU - Garnavich, P. M.

AU - Jha, S. W.

AU - Kirshner, R. P.

AU - Leibundgut, B.

AU - Li, W.

AU - Matheson, T.

AU - Miknaitis, G.

AU - Narayan, G.

AU - Pignata, G.

AU - Rest, A.

AU - Riess, A. G.

AU - Silverman, J. M.

AU - Smith, R. C.

AU - Spyromilio, J.

AU - Stritzinger, M.

AU - Stubbs, C. W.

AU - Suntzeff, N. B.

AU - Tonry, J. L.

AU - Tucker, B. E.

AU - Zenteno, A.

PY - 2008/8/1

Y1 - 2008/8/1

N2 - We present multiepoch spectra of 13 high-redshift Type Ia supernovae (SNe Ia) drawn from the literature, the ESSENCE and SNLS projects, and our own separate dedicated program on the ESO Very Large Telescope. We use the Supernova Identification (SNID) code of Blondin and Tonry to determine the spectral ages in the supernova rest frame. Comparison with the observed elapsed time yields an apparent aging rate consistent with the 1 /(1 + z) factor (where z is the redshifi) expected in a homogeneous, isotropic, expanding universe. These measurements thus confirm the expansion hypothesis, while unambiguously excluding models that predict no time dilation, such as Zwicky's "tired light" hypothesis. We also test for power-law dependencies of the aging rate on redshift. The best-fit exponent for these models is consistent with the expected 1/(1 + z) factor.

AB - We present multiepoch spectra of 13 high-redshift Type Ia supernovae (SNe Ia) drawn from the literature, the ESSENCE and SNLS projects, and our own separate dedicated program on the ESO Very Large Telescope. We use the Supernova Identification (SNID) code of Blondin and Tonry to determine the spectral ages in the supernova rest frame. Comparison with the observed elapsed time yields an apparent aging rate consistent with the 1 /(1 + z) factor (where z is the redshifi) expected in a homogeneous, isotropic, expanding universe. These measurements thus confirm the expansion hypothesis, while unambiguously excluding models that predict no time dilation, such as Zwicky's "tired light" hypothesis. We also test for power-law dependencies of the aging rate on redshift. The best-fit exponent for these models is consistent with the expected 1/(1 + z) factor.

KW - Cosmology: miscellaneous

KW - Supernovae: general

UR - http://www.scopus.com/inward/record.url?scp=53549121988&partnerID=8YFLogxK

U2 - 10.1086/589568

DO - 10.1086/589568

M3 - Article

SN - 0004-637X

VL - 682

SP - 724

EP - 736

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 2

ER -

Time dilation in type Ia supernova spectra at high redshift

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