AuthorWesternacher-Schneider, John Ryan
Couch, Sean M.
AffiliationUniv Arizona, Dept Astron Steward Observ
MetadataShow full item record
PublisherAMER PHYSICAL SOC
CitationWesternacher-Schneider, J. R., O’Connor, E., O’Sullivan, E., Tamborra, I., Wu, M.-R., Couch, S. M., & Malmenbeck, F. (2019). Multimessenger asteroseismology of core-collapse supernovae. Physical Review D, 100(12). https://doi.org/10.1103/physrevd.100.123009
JournalPHYSICAL REVIEW D
RightsCopyright © 2019 American Physical Society.
Collection InformationThis 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 email@example.com.
AbstractWe investigate correlated gravitational wave and neutrino signals from rotating core-collapse supernovae with simulations. Using an improved mode identification procedure based on mode function matching, we show that a linear quadrupolar mode of the core produces a dual imprint on gravitational waves and neutrinos in the early post-bounce phase of the supernova. The angular harmonics of the neutrino emission are consistent with the mode energy around the neutrinospheres, which points to a mechanism for the imprint on neutrinos. Thus, neutrinos carry information about the mode amplitude in the outer region of the core, whereas gravitational waves probe deeper in. We also find that the best-fit mode function has a frequency bounded above by similar to 420 Hz, and yet the mode's frequency in our simulations is similar to 15% higher, due to the use of Newtonian hydrodynamics and a widely used pseudo-Newtonian gravity approximation. This overestimation is particularly important for the analysis of gravitational wave detectability and asteroseismology, pointing to limitations of pseudo-Newtonian approaches for these purposes, possibly even resulting in excitation of incorrect modes. In addition, mode frequency matching (as opposed to mode function matching) could be resulting in mode misidentification in recent work. Lastly, we evaluate the prospects of a multimessenger detection of the mode using current technology. The detection of the imprint on neutrinos is most challenging, with a maximum detection distance of similar to 1 kpc using the IceCube Neutrino Observatory. The maximum distance for detecting the complementary gravitational wave imprint is similar to 5 kpc using Advanced LIGO at design sensitivity.
VersionFinal published version
SponsorsDanish National Research FoundationDanmarks Grundforskningsfond [DNRF132]; Ontario Graduate ScholarshipOntario Graduate Scholarship; Swedish Research CouncilSwedish Research Council [2018-04575]; Villum Foundation ; Deutsche ForschungsgemeinschaftGerman Research Foundation (DFG) [Sonderforschungsbereich SFB 1258]; Ministry of Science and Technology, TaiwanMinistry of Science and Technology, Taiwan [107-2119-M-001-038]; Physics Division, National Center of Theoretical Science of Taiwan; U.S. Department of Energy, Office of Science, Office of Nuclear PhysicsUnited States Department of Energy (DOE) [DE-SC0015904, DE-SC0017955]