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To TDE or not to TDE: the luminous transient ASASSN-18jd with TDE-like and AGN-like qualities

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cris.lastimport.scopus2024-02-12T19:03:48Z
dc.abstract.enWe present the discovery of ASASSN-18jd (AT 2018bcb), a luminous optical/ultraviolet(UV)/X-ray transient located in the nucleus of the galaxy 2MASX J22434289-1659083 at z = 0.1192. Over the year after discovery, Swift UltraViolet and Optical Telescope (UVOT) photometry shows the UV spectral energy distribution of the transient to be well modelled by a slowly shrinking blackbody with temperature $T \sim 2.5 \times 10^{4} \, {\rm K}$, a maximum observed luminosity of $L_{\rm max} = 4.5^{+0.6}_{-0.3}\times 10^{44} \, {\rm erg \,s}^{-1}$, and a radiated energy of $E = 9.6^{+1.1}_{-0.6} \times 10^{51} \, {\rm erg}$. X-ray data from Swift X-Ray Telescope (XRT) and XMM-Newton show a transient, variable X-ray flux with blackbody and power-law components that fade by nearly an order of magnitude over the following year. Optical spectra show strong, roughly constant broad Balmer emission and transient features attributable to He II, N III-V, O III, and coronal Fe. While ASASSN-18jd shares similarities with tidal disruption events (TDEs), it is also similar to the newly discovered nuclear transients seen in quiescent galaxies and faint active galactic nuclei (AGNs).
dc.affiliationUniwersytet Warszawski
dc.contributor.authorNeustadt, J. M. M.
dc.contributor.authorHoloien, T. W. -S.
dc.contributor.authorKochanek, C. S.
dc.contributor.authorAuchettl, K.
dc.contributor.authorBrown, J. S.
dc.contributor.authorShappee, B. J.
dc.contributor.authorPogge, R. W.
dc.contributor.authorDong, Subo
dc.contributor.authorStanek, K. Z.
dc.contributor.authorTucker, M. A.
dc.contributor.authorBose, S.
dc.contributor.authorChen, Ping
dc.contributor.authorRicci, C.
dc.contributor.authorVallely, P. J.
dc.contributor.authorPrieto, J. L.
dc.contributor.authorThompson, T. A.
dc.contributor.authorCoulter, D. A.
dc.contributor.authorDrout, M. R.
dc.contributor.authorFoley, R. J.
dc.contributor.authorKilpatrick, C. D.
dc.contributor.authorPiro, A. L.
dc.contributor.authorRojas-Bravo, C.
dc.contributor.authorBuckley, D. A. H.
dc.contributor.authorGromadzki, Mariusz
dc.contributor.authorDimitriadis, G.
dc.contributor.authorSiebert, M. R.
dc.contributor.authorDo, A.
dc.contributor.authorHuber, M. E.
dc.contributor.authorPayne, A. V.
dc.date.accessioned2024-01-26T11:04:28Z
dc.date.available2024-01-26T11:04:28Z
dc.date.copyright2019-10-02
dc.date.issued2020
dc.description.accesstimeBEFORE_PUBLICATION
dc.description.financePublikacja bezkosztowa
dc.description.number2
dc.description.versionORIGINAL_AUTHOR
dc.description.volume494
dc.identifier.doi10.1093/MNRAS/STAA859
dc.identifier.issn0035-8711
dc.identifier.urihttps://repozytorium.uw.edu.pl//handle/item/123619
dc.identifier.weblinkhttp://adsabs.harvard.edu/abs/2020MNRAS.494.2538N
dc.languageeng
dc.pbn.affiliationastronomy
dc.relation.ispartofMonthly Notices of the Royal Astronomical Society
dc.relation.pages2538-2560
dc.rightsOther
dc.sciencecloudnosend
dc.titleTo TDE or not to TDE: the luminous transient ASASSN-18jd with TDE-like and AGN-like qualities
dc.typeJournalArticle
dspace.entity.typePublication