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dc.contributor.author
DES Collaboration
dc.contributor.author
Scolnic, Daniel
dc.contributor.author
Hartley, William G.
dc.contributor.author
et al.
dc.date.accessioned
2020-07-07T09:43:35Z
dc.date.available
2020-07-04T02:59:25Z
dc.date.available
2020-07-07T09:43:35Z
dc.date.issued
2020-06-10
dc.identifier.issn
1967-2014
dc.identifier.issn
2041-8213
dc.identifier.other
10.3847/2041-8213/ab8735
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/424386
dc.description.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. © The American Astronomical Society 2020
en_US
dc.language.iso
en
en_US
dc.publisher
IOP Publishing
dc.title
Supernova Siblings: Assessing the Consistency of Properties of Type Ia Supernovae that Share the Same Parent Galaxies
en_US
dc.type
Journal Article
ethz.journal.title
The Astrophysical Journal Letters
ethz.journal.volume
896
en_US
ethz.journal.issue
1
en_US
ethz.journal.abbreviated
ApJL
ethz.pages.start
L13
en_US
ethz.size
9 p.
en_US
ethz.identifier.wos
ethz.identifier.scopus
ethz.publication.place
Bristol
ethz.publication.status
published
en_US
ethz.date.deposited
2020-07-04T02:59:39Z
ethz.source
SCOPUS
ethz.eth
yes
en_US
ethz.availability
Metadata only
en_US
ethz.rosetta.installDate
2020-07-07T09:43:55Z
ethz.rosetta.lastUpdated
2024-02-02T11:22:22Z
ethz.rosetta.versionExported
true
ethz.COinS
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