Discovery and follow-up of the unusual nuclear transient OGLE17aaj

M. Gromadzki; A. Hamanowicz; L. Wyrzykowski; K. V. Sokolovsky; M. Fraser; Sz Kozłowski; J. Guillochon; I. Arcavi; B. Trakhtenbrot; P. G. Jonker; S. Mattila; A. Udalski; M. K. Szymański; I. Soszyński; R. Poleski; P. Pietrukowicz; J. Skowron; P. Mróz; K. Ulaczyk; M. Pawlak; K. A. Rybicki; J. Sollerman; F. Taddia; Z. Kostrzewa-Rutkowska; F. Onori; D. R. Young; K. Maguire; S. J. Smartt; C. Inserra; A. Gal-Yam; A. Rau; T. W. Chen; C. R. Angus; D. A.H. Buckley

doi:10.1051/0004-6361/201833682

Discovery and follow-up of the unusual nuclear transient OGLE17aaj

M. Gromadzki
, A. Hamanowicz
, L. Wyrzykowski
, K. V. Sokolovsky
, M. Fraser
, Sz Kozłowski
, J. Guillochon
, I. Arcavi
, B. Trakhtenbrot
, P. G. Jonker
, S. Mattila
, A. Udalski
, M. K. Szymański
, I. Soszyński
, R. Poleski
, P. Pietrukowicz
, J. Skowron
, P. Mróz
, K. Ulaczyk
, M. Pawlak

K. A. Rybicki, J. Sollerman, F. Taddia, Z. Kostrzewa-Rutkowska, F. Onori, D. R. Young, K. Maguire, S. J. Smartt, C. Inserra, A. Gal-Yam, A. Rau, T. W. Chen, C. R. Angus, D. A.H. Buckley

Research output: Contribution to journal › Article › peer-review

34 Citations (Scopus)

Abstract

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, spectroscopic, 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.

Original language	English
Article number	L2
Number of pages	5
Journal	Astronomy and Astrophysics
Volume	622
DOIs	https://doi.org/10.1051/0004-6361/201833682
Publication status	Published - 01 Feb 2019

Keywords

Black hole physics
Galaxy: nucleus

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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Gromadzki, M., Hamanowicz, A., Wyrzykowski, L., Sokolovsky, K. V., Fraser, M., Kozłowski, S., Guillochon, J., Arcavi, I., Trakhtenbrot, B., Jonker, P. G., Mattila, S., Udalski, A., Szymański, M. K., Soszyński, I., Poleski, R., Pietrukowicz, P., Skowron, J., Mróz, P., Ulaczyk, K., ... Buckley, D. A. H. (2019). Discovery and follow-up of the unusual nuclear transient OGLE17aaj. Astronomy and Astrophysics, 622, Article L2. https://doi.org/10.1051/0004-6361/201833682

@article{3123022449a346eeb8ab39f929daabfc,

title = "Discovery and follow-up of the unusual nuclear transient OGLE17aaj",

abstract = "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, spectroscopic, 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.",

keywords = "Black hole physics, Galaxy: nucleus",

author = "M. Gromadzki and A. Hamanowicz and L. Wyrzykowski and Sokolovsky, \{K. V.\} and M. Fraser and Sz Koz{\l}owski and J. Guillochon and I. Arcavi and B. Trakhtenbrot and Jonker, \{P. G.\} and S. Mattila and A. Udalski and Szyma{\'n}ski, \{M. K.\} and I. Soszy{\'n}ski and R. Poleski and P. Pietrukowicz and J. Skowron and P. Mr{\'o}z and K. Ulaczyk and M. Pawlak and Rybicki, \{K. A.\} and J. Sollerman and F. Taddia and Z. Kostrzewa-Rutkowska and F. Onori and Young, \{D. R.\} and K. Maguire and Smartt, \{S. J.\} and C. Inserra and A. Gal-Yam and A. Rau and Chen, \{T. W.\} and Angus, \{C. R.\} and Buckley, \{D. A.H.\}",

year = "2019",

month = feb,

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doi = "10.1051/0004-6361/201833682",

language = "English",

volume = "622",

journal = "Astronomy and Astrophysics",

issn = "0004-6361",

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Gromadzki, M, Hamanowicz, A, Wyrzykowski, L, Sokolovsky, KV, Fraser, M, Kozłowski, S, Guillochon, J, Arcavi, I, Trakhtenbrot, B, Jonker, PG, Mattila, S, Udalski, A, Szymański, MK, Soszyński, I, Poleski, R, Pietrukowicz, P, Skowron, J, Mróz, P, Ulaczyk, K, Pawlak, M, Rybicki, KA, Sollerman, J, Taddia, F, Kostrzewa-Rutkowska, Z, Onori, F, Young, DR, Maguire, K, Smartt, SJ, Inserra, C, Gal-Yam, A, Rau, A, Chen, TW, Angus, CR & Buckley, DAH 2019, 'Discovery and follow-up of the unusual nuclear transient OGLE17aaj', Astronomy and Astrophysics, vol. 622, L2. https://doi.org/10.1051/0004-6361/201833682

TY - JOUR

T1 - Discovery and follow-up of the unusual nuclear transient OGLE17aaj

AU - Gromadzki, M.

AU - Hamanowicz, A.

AU - Wyrzykowski, L.

AU - Sokolovsky, K. V.

AU - Fraser, M.

AU - Kozłowski, Sz

AU - Guillochon, J.

AU - Arcavi, I.

AU - Trakhtenbrot, B.

AU - Jonker, P. G.

AU - Mattila, S.

AU - Udalski, A.

AU - Szymański, M. K.

AU - Soszyński, I.

AU - Poleski, R.

AU - Pietrukowicz, P.

AU - Skowron, J.

AU - Mróz, P.

AU - Ulaczyk, K.

AU - Pawlak, M.

AU - Rybicki, K. A.

AU - Sollerman, J.

AU - Taddia, F.

AU - Kostrzewa-Rutkowska, Z.

AU - Onori, F.

AU - Young, D. R.

AU - Maguire, K.

AU - Smartt, S. J.

AU - Inserra, C.

AU - Gal-Yam, A.

AU - Rau, A.

AU - Chen, T. W.

AU - Angus, C. R.

AU - Buckley, D. A.H.

PY - 2019/2/1

Y1 - 2019/2/1

N2 - 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, spectroscopic, 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.

AB - 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, spectroscopic, 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.

KW - Black hole physics

KW - Galaxy: nucleus

UR - https://www.scopus.com/pages/publications/85060842925

U2 - 10.1051/0004-6361/201833682

DO - 10.1051/0004-6361/201833682

M3 - Article

AN - SCOPUS:85060842925

SN - 0004-6361

VL - 622

JO - Astronomy and Astrophysics

JF - Astronomy and Astrophysics

M1 - L2

ER -

Discovery and follow-up of the unusual nuclear transient OGLE17aaj

Abstract

Keywords

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