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Supernova siblings: Assessing the consistency of properties of type Ia Supernovae that share the same parent galaxies

Supernova siblings: Assessing the consistency of properties of type Ia Supernovae that share the same parent galaxies
Supernova siblings: Assessing the consistency of properties of type Ia Supernovae that share the same parent galaxies
While many studies have shown a correlation between properties of the light curves of SNe Ia and properties of their host galaxies, it remains unclear what is driving these correlations. We introduce a new direct method to study these correlations by analyzing "parent" galaxies that host multiple SNe Ia "siblings." Here, we search the Dark Energy Survey SN sample, one of the largest samples of discovered SNe, and find eight galaxies that hosted two likely SNe Ia. Comparing the light-curve properties of these SNe and recovered distances from the light curves, we find no better agreement between properties of SNe in the same galaxy as any random pair of galaxies, with the exception of the SN light-curve stretch. We show at 2.8σ significance that at least one-half of the intrinsic scatter of SNe Ia distance modulus residuals is not from common host properties. We also discuss the robustness with which we could make this evaluation with LSST, which will find 100× more pairs of galaxies, and pave a new line of study on the consistency of SNe Ia in the same parent galaxies. Finally, we argue that it is unlikely that some of these SNe are actually single, lensed SN with multiple images.
Observational cosmology, 1146
2041-8205
Scolnic, D.
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Massiah, A.
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Wiseman, P.
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Brout, D.
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Kessler, R.
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Foley, R. J.
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Galbany, L.
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Hinton, S. R.
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Kelsey, L.
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Lidman, C.
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Macaulay, E.
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Nichol, R. C.
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Möller, A.
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Popovic, B.
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Sako, M.
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Sullivan, M.
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Annis, J.
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Burke, D. L.
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Rosell, A. Carnero
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Carollo, D.
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Kind, M. Carrasco
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Carretero, J.
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Costanzi, M.
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da Costa, L. N.
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De Vicente, J.
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Desai, S.
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Diehl, H. T.
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Doel, P.
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Drlica-Wagner, A.
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Everett, S.
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Flaugher, B.
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Fosalba, P.
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Frieman, J.
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García-Bellido, J.
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Gaztanaga, E.
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Gerdes, D. W.
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Glazebrook, K.
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Gruen, D.
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Gruendl, R. A.
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Gschwend, J.
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Gutierrez, G.
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Pursiainen, M.
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The Dark Energy Survey Collaboration
Scolnic, D.
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Massiah, A.
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Wiseman, P.
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Brout, D.
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Kessler, R.
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Foley, R. J.
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Galbany, L.
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Hinton, S. R.
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Nichol, R. C.
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Möller, A.
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Popovic, B.
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Sako, M.
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Sullivan, M.
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Tucker, B. E.
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Aguena, M.
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Allam, S.
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Annis, J.
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Avila, S.
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Bechtol, K.
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Bertin, E.
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Burke, D. L.
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Rosell, A. Carnero
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Carollo, D.
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Kind, M. Carrasco
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Carretero, J.
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Costanzi, M.
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da Costa, L. N.
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De Vicente, J.
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Desai, S.
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Diehl, H. T.
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Doel, P.
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Drlica-Wagner, A.
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Eckert, K.
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Eifler, T. F.
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Everett, S.
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Flaugher, B.
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Fosalba, P.
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Frieman, J.
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García-Bellido, J.
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Gaztanaga, E.
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Gerdes, D. W.
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Glazebrook, K.
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Gruen, D.
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Gruendl, R. A.
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Gschwend, J.
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Gutierrez, G.
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Pursiainen, M.
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Scolnic, D., Massiah, A., Wiseman, P., Brout, D., Kessler, R., Foley, R. J., Galbany, L., Hinton, S. R., Kelsey, L., Lidman, C., Macaulay, E., Nichol, R. C., Möller, A., Popovic, B., Sako, M., Sullivan, M., Tucker, B. E., Aguena, M., Allam, S., Annis, J., Avila, S., Bechtol, K., Bertin, E., Burke, D. L., Rosell, A. Carnero, Carollo, D., Kind, M. Carrasco, Carretero, J., Costanzi, M., da Costa, L. N., De Vicente, J., Desai, S., Diehl, H. T., Doel, P., Drlica-Wagner, A., Eckert, K., Eifler, T. F., Everett, S., Flaugher, B., Fosalba, P., Frieman, J., García-Bellido, J., Gaztanaga, E., Gerdes, D. W., Glazebrook, K., Gruen, D., Gruendl, R. A., Gschwend, J., Gutierrez, G. and Pursiainen, M. , The Dark Energy Survey Collaboration (2020) Supernova siblings: Assessing the consistency of properties of type Ia Supernovae that share the same parent galaxies. The Astrophysical Journal Letters, 896 (1). (doi:10.3847/2041-8213/ab8735).

Record type: Article

Abstract

While many studies have shown a correlation between properties of the light curves of SNe Ia and properties of their host galaxies, it remains unclear what is driving these correlations. We introduce a new direct method to study these correlations by analyzing "parent" galaxies that host multiple SNe Ia "siblings." Here, we search the Dark Energy Survey SN sample, one of the largest samples of discovered SNe, and find eight galaxies that hosted two likely SNe Ia. Comparing the light-curve properties of these SNe and recovered distances from the light curves, we find no better agreement between properties of SNe in the same galaxy as any random pair of galaxies, with the exception of the SN light-curve stretch. We show at 2.8σ significance that at least one-half of the intrinsic scatter of SNe Ia distance modulus residuals is not from common host properties. We also discuss the robustness with which we could make this evaluation with LSST, which will find 100× more pairs of galaxies, and pave a new line of study on the consistency of SNe Ia in the same parent galaxies. Finally, we argue that it is unlikely that some of these SNe are actually single, lensed SN with multiple images.

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Accepted/In Press date: 6 April 2020
Published date: 10 June 2020
Keywords: Observational cosmology, 1146
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Identifiers

Local EPrints ID: 470512
URI: http://eprints.soton.ac.uk/id/eprint/470512
DOI: doi:10.3847/2041-8213/ab8735
ISSN: 2041-8205
PURE UUID: 15099473-6f5a-44ed-842c-2aacabc37485
ORCID for P. Wiseman: ORCID iD orcid.org/0000-0002-3073-1512
ORCID for M. Sullivan: ORCID iD orcid.org/0000-0001-9053-4820

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Date deposited: 12 Oct 2022 16:41
Last modified: 17 Mar 2024 03:48

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Contributors

Author: D. Scolnic
Author: A. Massiah
Author: P. Wiseman ORCID iD
Author: D. Brout
Author: R. Kessler
Author: R. J. Foley
Author: L. Galbany
Author: S. R. Hinton
Author: L. Kelsey
Author: C. Lidman
Author: E. Macaulay
Author: R. C. Nichol
Author: A. Möller
Author: B. Popovic
Author: M. Sako
Author: M. Sullivan ORCID iD
Author: B. E. Tucker
Author: M. Aguena
Author: S. Allam
Author: J. Annis
Author: S. Avila
Author: K. Bechtol
Author: E. Bertin
Author: D. L. Burke
Author: A. Carnero Rosell
Author: D. Carollo
Author: M. Carrasco Kind
Author: J. Carretero
Author: M. Costanzi
Author: L. N. da Costa
Author: J. De Vicente
Author: S. Desai
Author: H. T. Diehl
Author: P. Doel
Author: A. Drlica-Wagner
Author: K. Eckert
Author: T. F. Eifler
Author: S. Everett
Author: B. Flaugher
Author: P. Fosalba
Author: J. Frieman
Author: J. García-Bellido
Author: E. Gaztanaga
Author: D. W. Gerdes
Author: K. Glazebrook
Author: D. Gruen
Author: R. A. Gruendl
Author: J. Gschwend
Author: G. Gutierrez
Author: M. Pursiainen
Corporate Author: The Dark Energy Survey Collaboration

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