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    A tidal disruption event coincident with a high-energy neutrino

    91347.pdf (4.154Mb)
    Access Status
    Open access
    Authors
    Stein, R.
    Velzen, S.V.
    Kowalski, M.
    Franckowiak, A.
    Gezari, S.
    Miller-Jones, James
    Frederick, S.
    Sfaradi, I.
    Bietenholz, M.F.
    Horesh, A.
    Fender, R.
    Garrappa, S.
    Ahumada, T.
    Andreoni, I.
    Belicki, J.
    Bellm, E.C.
    Böttcher, M.
    Brinnel, V.
    Burruss, R.
    Cenko, S.B.
    Coughlin, M.W.
    Cunningham, V.
    Drake, A.
    Farrar, G.R.
    Feeney, M.
    Foley, R.J.
    Gal-Yam, A.
    Golkhou, V.Z.
    Goobar, A.
    Graham, M.J.
    Hammerstein, E.
    Helou, G.
    Hung, T.
    Kasliwal, M.M.
    Kilpatrick, C.D.
    Kong, A.K.H.
    Kupfer, T.
    Laher, R.R.
    Mahabal, A.A.
    Masci, F.J.
    Necker, J.
    Nordin, J.
    Perley, D.A.
    Rigault, M.
    Reusch, S.
    Rodriguez, H.
    Rojas-Bravo, C.
    Rusholme, B.
    Shupe, D.L.
    Singer, L.P.
    Sollerman, J.
    Soumagnac, M.T.
    Stern, D.
    Taggart, K.
    van Santen, J.
    Ward, C.
    Woudt, P.
    Yao, Y.
    Date
    2021
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Stein, R. and Velzen, S.V. and Kowalski, M. and Franckowiak, A. and Gezari, S. and Miller-Jones, J.C.A. and Frederick, S. et al. 2021. A tidal disruption event coincident with a high-energy neutrino. Nature Astronomy. 5 (5): pp. 510-518.
    Source Title
    Nature Astronomy
    DOI
    10.1038/s41550-020-01295-8
    ISSN
    2397-3366
    Faculty
    Faculty of Science and Engineering
    School
    School of Elec Eng, Comp and Math Sci (EECMS)
    Funding and Sponsorship
    http://purl.org/au-research/grants/arc/DP200102471
    URI
    http://hdl.handle.net/20.500.11937/91523
    Collection
    • Curtin Research Publications
    Abstract

    Cosmic neutrinos provide a unique window into the otherwise hidden mechanism of particle acceleration in astrophysical objects. The IceCube Collaboration recently reported the likely association of one high-energy neutrino with a flare from the relativistic jet of an active galaxy pointed towards the Earth. However a combined analysis of many similar active galaxies revealed no excess from the broader population, leaving the vast majority of the cosmic neutrino flux unexplained. Here we present the likely association of a radio-emitting tidal disruption event, AT2019dsg, with a second high-energy neutrino. AT2019dsg was identified as part of our systematic search for optical counterparts to high-energy neutrinos with the Zwicky Transient Facility. The probability of finding any coincident radio-emitting tidal disruption event by chance is 0.5%, while the probability of finding one as bright in bolometric energy flux as AT2019dsg is 0.2%. Our electromagnetic observations can be explained through a multizone model, with radio analysis revealing a central engine, embedded in a UV photosphere, that powers an extended synchrotron-emitting outflow. This provides an ideal site for petaelectronvolt neutrino production. Assuming that the association is genuine, our observations suggest that tidal disruption events with mildly relativistic outflows contribute to the cosmic neutrino flux.

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