Supernova Siblings: Assessing the Consistency of Properties of Type Ia Supernovae that Share the Same Parent Galaxies
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Author
Scolnic, D.Smith, M.
Massiah, A.
Wiseman, P.
Brout, D.
Kessler, R.

Davis, T. M.
Foley, R. J.
Galbany, L.
Hinton, S. R.
Hounsell, R.
Kelsey, L.
Lidman, C.
Macaulay, E.
Morgan, R.
Nichol, R. C.
Möller, A.
Popovic, B.
Sako, M.
Sullivan, M.

Thomas, B. P.
Tucker, B. E.
Abbott, T. M. C.
Aguena, M.
Allam, S.
Annis, J.
Avila, S.
Bechtol, K.
Bertin, E.
Brooks, D.
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.
Hartley, W. G.
Hollowood, D. L.
Honscheid, K.
James, D. J.
Kuehn, K.
Kuropatkin, N.
Lewis, G. F.
Li, T. S.
Lima, M.
Maia, M. A. G.
Marshall, J. L.
Menanteau, F.
Miquel, R.
Palmese, A.
Paz-Chinchón, F.
Plazas, A. A.
Pursiainen, M.
Sanchez, E.
Scarpine, V.
Schubnell, M.
Serrano, S.
Sevilla-Noarbe, I.
Sommer, N. E.
Suchyta, E.
Swanson, M. E. C.
Tarle, G.
Varga, T. N.
Walker, A. R.
Wilkinson, R.
Affiliation
Univ Arizona, Dept Astron, Steward ObservIssue Date
2020-06-10Keywords
Observational cosmology
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IOP PUBLISHING LTDCitation
Scolnic, D., Smith, M., Massiah, A., Wiseman, P., Brout, D., Kessler, R., ... & Wilkinson, R. (2020). Supernova Siblings: Assessing the Consistency of Properties of Type Ia Supernovae that Share the Same Parent Galaxies. The Astrophysical Journal Letters, 896(1), L13.Journal
ASTROPHYSICAL JOURNAL LETTERSRights
© 2020. The American Astronomical Society. All rights reserved.Collection Information
This item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.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 2.8 sigma 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 100x 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.ISSN
2041-8205EISSN
2041-8213Version
Final published versionae974a485f413a2113503eed53cd6c53
10.3847/2041-8213/ab8735