Supernova Siblings: Assessing the Consistency of Properties of Type Ia Supernovae that Share the Same Parent Galaxies Academic Article uri icon

abstract

  • 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 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.

published proceedings

  • ASTROPHYSICAL JOURNAL LETTERS

altmetric score

  • 30.08

author list (cited authors)

  • Scolnic, D., Smith, M., Massiah, A., Wiseman, P., Brout, D., Kessler, R., ... Wilkinson, R.

citation count

  • 29

complete list of authors

  • Scolnic, D||Smith, M||Massiah, A||Wiseman, P||Brout, D||Kessler, R||Davis, TM||Foley, RJ||Galbany, L||Hinton, SR||Hounsell, R||Kelsey, L||Lidman, C||Macaulay, E||Morgan, R||Nichol, RC||Moller, A||Popovic, B||Sako, M||Sullivan, M||Thomas, BP||Tucker, BE||Abbott, TMC||Aguena, M||Allam, S||Annis, J||Avila, S||Bechtol, K||Bertin, E||Brooks, D||Burke, DL||Rosell, A Carnero||Carollo, D||Kind, M Carrasco||Carretero, J||Costanzi, M||da Costa, LN||De Vicente, J||Desai, S||Diehl, HT||Doel, P||Drlica-Wagner, A||Eckert, K||Eifler, TF||Everett, S||Flaugher, B||Fosalba, P||Frieman, J||Garcia-Bellido, J||Gaztanaga, E||Gerdes, DW||Glazebrook, K||Gruen, D||Gruendl, RA||Gschwend, J||Gutierrez, G||Hartley, WG||Hollowood, DL||Honscheid, K||James, DJ||Kuehn, K||Kuropatkin, N||Lewis, GF||Li, TS||Lima, M||Maia, MAG||Marshall, JL||Menanteau, F||Miquel, R||Palmese, A||Paz-Chinchon, F||Plazas, AA||Pursiainen, M||Sanchez, E||Scarpine, V||Schubnell, M||Serrano, S||Sevilla-Noarbe, I||Sommer, NE||Suchyta, E||Swanson, MEC||Tarle, G||Varga, TN||Walker, AR||Wilkinson, R

publication date

  • June 2020