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    The Birth of a Relativistic Jet Following the Disruption of a Star by a Cosmological Black Hole

    96201.pdf (4.286Mb)
    Access Status
    Open access
    Authors
    Pasham, D.R.
    Lucchini, M.
    Laskar, T.
    Gompertz, B.P.
    Srivastav, S.
    Nicholl, M.
    Smartt, S.J.
    Miller-Jones, James
    Alexander, K.D.
    Fender, R.
    Smith, G.P.
    Fulton, M.
    Dewangan, G.
    Gendreau, K.
    Coughlin, E.R.
    Rhodes, L.
    Horesh, A.
    van Velzen, S.
    Sfaradi, I.
    Guolo, M.
    Castro Segura, N.
    Aamer, A.
    Anderson, J.P.
    Arcavi, I.
    Brennan, S.J.
    Chambers, K.
    Charalampopoulos, P.
    Chen, T.W.
    Clocchiatti, A.
    de Boer, T.
    Dennefeld, M.
    Ferrara, E.
    Galbany, L.
    Gao, H.
    Gillanders, J.H.
    Goodwin, Adelle
    Gromadzki, M.
    Huber, M.
    Jonker, P.G.
    Joshi, M.
    Kara, E.
    Killestein, T.L.
    Kosec, P.
    Kocevski, D.
    Leloudas, G.
    Lin, C.C.
    Margutti, R.
    Mattila, S.
    Moore, T.
    Müller-Bravo, T.
    Ngeow, C.C.
    Oates, S.
    Onori, F.
    Pan, Y.C.
    Perez-Torres, M.
    Rani, P.
    Remillard, R.
    Ridley, E.J.
    Schulze, S.
    Sheng, X.
    Shingles, L.
    Smith, K.W.
    Steiner, J.F.
    Wainscoat, R.
    Wevers, T.
    Yang, S.
    Date
    2023
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Pasham, D.R. and Lucchini, M. and Laskar, T. and Gompertz, B.P. and Srivastav, S. and Nicholl, M. and Smartt, S.J. et al. 2023. The Birth of a Relativistic Jet Following the Disruption of a Star by a Cosmological Black Hole. Nature Astronomy. 7 (1): pp. 88-104.
    Source Title
    Nature Astronomy
    DOI
    10.1038/s41550-022-01820-x
    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
    Remarks

    This version of the article has been accepted for publication, after peer review (when applicable) and is subject to Springer Nature’s AM terms of use, but is not the Version of Record and does not reflect post-acceptance improvements, or any corrections. The Version of Record is available online at: http://dx.doi.org/10.1038/s41550-022-01820-x

    URI
    http://hdl.handle.net/20.500.11937/96437
    Collection
    • Curtin Research Publications
    Abstract

    A black hole can launch a powerful relativistic jet after it tidally disrupts a star. If this jet fortuitously aligns with our line of sight, the overall brightness is Doppler boosted by several orders of magnitude. Consequently, such on-axis relativistic tidal disruption events have the potential to unveil cosmological (redshift z > 1) quiescent black holes and are ideal test beds for understanding the radiative mechanisms operating in super-Eddington jets. Here we present multiwavelength (X-ray, UV, optical and radio) observations of the optically discovered transient AT 2022cmc at z = 1.193. Its unusual X-ray properties, including a peak observed luminosity of ≳1048 erg s−1, systematic variability on timescales as short as 1,000 s and overall duration lasting more than 30 days in the rest frame, are traits associated with relativistic tidal disruption events. The X-ray to radio spectral energy distributions spanning 5–50 days after discovery can be explained as synchrotron emission from a relativistic jet (radio), synchrotron self-Compton (X-rays) and thermal emission similar to that seen in low-redshift tidal disruption events (UV/optical). Our modelling implies a beamed, highly relativistic jet akin to blazars but requires extreme matter domination (that is, a high ratio of electron-to-magnetic-field energy densities in the jet) and challenges our theoretical understanding of jets.

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