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Discovery and follo...
Discovery and follow-up of the unusual nuclear transient OGLE17aaj
- Article/chapterEnglish2019
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2019-01-24
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EDP Sciences,2019
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LIBRIS-ID:oai:DiVA.org:su-166794
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https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-166794URI
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https://doi.org/10.1051/0004-6361/201833682DOI
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Language:English
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Summary in:English
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Subject category:ref swepub-contenttype
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Subject category:art swepub-publicationtype
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Aims. We report on the discovery and follow-up of a peculiar transient, OGLE17aaj, which occurred in the nucleus of a weakly active galaxy. We investigate whether it can be interpreted as a new candidate for a tidal disruption event (TDE).Methods. We present the OGLE-IV light curve that covers the slow 60-day-long rise to maximum along with photometric, spectro-scopic, and X-ray follow-up during the first year.Results. OGLE17aaj is a nuclear transient exhibiting some properties similar to previously found TDEs, including a long rise time, lack of colour-temperature evolution, and high black-body temperature. On the other hand, its narrow emission lines and slow post-peak evolution are different from previously observed TDEs. Its spectrum and light-curve evolution is similar to F01004-2237 and AT 2017bgt. Signatures of historical low-level nuclear variability suggest that OGLE17aaj may instead be related to a new type of accretion event in active super-massive black holes.
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Hamanowicz, A.
(author)
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Wyrzykowski, L.
(author)
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Sokolovsky, K. V.
(author)
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Fraser, M.
(author)
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Kozłowski, Sz.
(author)
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Guillochon, J.
(author)
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Arcavi, I.
(author)
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Trakhtenbrot, B.
(author)
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Jonker, P. G.
(author)
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Mattila, S.
(author)
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Udalski, A.
(author)
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Szymański, M. K.
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Soszyński, I.
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Poleski, R.
(author)
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Pietrukowicz, P.
(author)
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Skowron, J.
(author)
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Mróz, P.
(author)
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Ulaczyk, K.
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Pawlak, M.
(author)
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Rybicki, K. A.
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Sollerman, JesperStockholms universitet,Institutionen för astronomi,Oskar Klein-centrum för kosmopartikelfysik (OKC)(Swepub:su)solle
(author)
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Taddia, FrancescoStockholms universitet,Institutionen för astronomi,Oskar Klein-centrum för kosmopartikelfysik (OKC)(Swepub:su)ftadd
(author)
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Kostrzewa-Rutkowska, Z.
(author)
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Onori, F.
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Young, D. R.
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Maguire, K.
(author)
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Smartt, S. J.
(author)
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Inserra, C.
(author)
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Gal-Yam, A.
(author)
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Rau, A.
(author)
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Chen, T. -W.
(author)
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Angus, C. R.
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Buckley, D. A. H.
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Stockholms universitetInstitutionen för astronomi
(creator_code:org_t)
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In:Astronomy and Astrophysics: EDP Sciences6220004-63611432-0746
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Gromadzki, M.
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Hamanowicz, A.
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Wyrzykowski, L.
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Sokolovsky, K. V ...
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Fraser, M.
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Kozłowski, Sz.
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show more...
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Guillochon, J.
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Arcavi, I.
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Trakhtenbrot, B.
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Jonker, P. G.
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Mattila, S.
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Udalski, A.
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Szymański, M. K.
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Soszyński, I.
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Poleski, R.
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Pietrukowicz, P.
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Skowron, J.
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Mróz, P.
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Ulaczyk, K.
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Pawlak, M.
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Rybicki, K. A.
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Sollerman, Jespe ...
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Taddia, Francesc ...
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Kostrzewa-Rutkow ...
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Onori, F.
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Young, D. R.
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Maguire, K.
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Smartt, S. J.
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Inserra, C.
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Gal-Yam, A.
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Rau, A.
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Chen, T. -W.
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Angus, C. R.
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Buckley, D. A. H ...
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Stockholm University