2020MNRAS.494.2538N

Query : 2020MNRAS.494.2538N

2020MNRAS.494.2538N - Mon. Not. R. Astron. Soc., 494, 2538-2560 (2020/May-2)

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

NEUSTADT J.M.M., HOLOIEN T.W.-S., KOCHANEK C.S., AUCHETTL K., BROWN J.S., SHAPPEE B.J., POGGE R.W., DONG S., STANEK K.Z., TUCKER M.A., BOSE S., CHEN P., RICCI C., VALLELY P.J., PRIETO J.L., THOMPSON T.A., COULTER D.A., DROUT M.R., FOLEY R.J., KILPATRICK C.D., PIRO A.L., ROJAS-BRAVO C., BUCKLEY D.A.H., GROMADZKI M., DIMITRIADIS G., SIEBERT M.R., DO A., HUBER M.E. and PAYNE A.V.

Abstract (from CDS):

We 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 ∼2.5 ×104 K, a maximum observed luminosity of L_ max_ = 4.5+0.6–0.3×1044 erg s–1, and a radiated energy of E = 9.6+1.1–0.6 ×1051 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).

Abstract Copyright: © 2020 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): accretion, accretion discs - black hole physics - galaxies: nuclei

Simbad objects: 23

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Number of rows : 23
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 Z 500-36 AG? 00 29 57.0542865144 +32 53 37.265932104           ~ 155 0
2 IRAS 01003-2238 Sy2 01 02 49.9920152640 -22 21 57.262136544   18.62 18.9 17.83   ~ 192 0
3 OGLE17aaj ev 01 56 24.93 -71 04 15.7           ~ 29 0
4 2MASS J01580475-0052221 Sy1 01 58 04.7506373016 -00 52 21.927742716   18.84 18.34     SNII 114 1
5 AT 2019ahk ev 07 00 11.410 -66 02 25.16           ~ 57 0
6 SDSS J075654.53+341543.6 G 07 56 54.5382395520 +34 15 43.641537336           ~ 96 0
7 PTF 15af SN* 08 48 28.13 +22 03 33.4           ~ 69 0
8 2MASS J11084011+3405523 G 11 08 40.1149579272 +34 05 52.337925924           ~ 142 0
9 ZW VIII 211 rG 12 48 15.2253025968 +17 46 26.475426228   16.5       ~ 360 0
10 NGC 5548 Sy1 14 17 59.5400291832 +25 08 12.603122268   14.35 13.73     ~ 2895 0
11 CANDELS EGS F160W J141929.8+525206.4 AGN 14 19 29.80863 +52 52 06.3650   22.16   20.139 19.580 ~ 54 0
12 AT 2018dyk ev 15 33 08.01 +44 32 08.2           ~ 33 0
13 2MASX J16105891-6055250 AG? 16 10 58.8863559654 -60 55 24.411688282           ~ 78 0
14 AT 2017bgt AGN 16 11 05.518 +02 34 02.14           ~ 35 0
15 SWIFT J164449.3+573451 G 16 44 47.81184000 +57 35 00.7113480           ~ 533 0
16 iPTF 16axa ev 17 03 34.36 +30 35 36.8           ~ 54 0
17 HD 192163 WR* 20 12 06.5418877464 +38 21 17.784181008 7.12 7.49 7.50     WN6(h)-s 715 1
18 ASASSN -15oi SN* 20 39 09.096 -30 45 20.71           ~ 184 0
19 PS1-1000789 SN* 20 42 44.7490 +15 30 32.240           SNIIn 39 0
20 SWIFT J2058.4+0516 X 20 58 19.898 +05 13 32.25           ~ 169 0
21 2MASX J22434289-1659083 G 22 43 42.8758942080 -16 59 08.515594104           ~ 5 0
22 AT 2018bcb ev 22 43 42.90 -16 59 08.1           ~ 39 0
23 AT 2018fyk ev 22 50 16.10 -44 51 53.5           ~ 114 0

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