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

Abstract

ABSTRACT 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 $$T \sim 2.5 \times 10^{4} \, {\rm K}$$, 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).

Authors:
ORCiD logo [1]; ORCiD logo [2];  [3];  [4];  [5];  [6];  [1];  [7];  [1];  [6]; ORCiD logo [3];  [7];  [8]; ORCiD logo [1];  [9];  [3];  [5];  [10];  [5];  [5] more »;  [2];  [5]; ORCiD logo [11];  [12];  [5];  [5];  [6];  [6];  [6] « less
  1. Department of Astronomy, The Ohio State University, 140 West 18th Avenue, Columbus, OH 43210, USA
  2. The Observatories of the Carnegie Institution for Science, 813 Santa Barbara Street, Pasadena, CA 91101, USA
  3. Department of Astronomy, The Ohio State University, 140 West 18th Avenue, Columbus, OH 43210, USA, Center for Cosmology and AstroParticle Physics (CCAPP), The Ohio State University, 191 W. Woodruff Avenue, Columbus, OH 43210, USA
  4. DARK, Niels Bohr Institute, University of Copenhagen, Lyngbyvej 2, DK-2100 Copenhagen, Denmark, Department of Astronomy and Astrophysics, University of California, Santa Cruz, CA 95064, USA
  5. Department of Astronomy and Astrophysics, University of California, Santa Cruz, CA 95064, USA
  6. Institute for Astronomy, University of Hawai’i, 2680 Woodlawn Drive, Honolulu, HI 96822, USA
  7. Kavli Institute for Astronomy and Astrophysics, Peking University, Yi He Huan Road 5, Hai Dian District, Beijing 100871, China
  8. Kavli Institute for Astronomy and Astrophysics, Peking University, Yi He Huan Road 5, Hai Dian District, Beijing 100871, China, Núcleo de Astronomía de la Facultad de Ingeniería y Ciencias, Universidad Diego Portales, Av. Ejército 441, Santiago, Chile, Department of Physics and Astronomy, George Mason University, MS 3F3, 4400 University Drive, Fairfax, VA 22030, USA
  9. Núcleo de Astronomía de la Facultad de Ingeniería y Ciencias, Universidad Diego Portales, Av. Ejército 441, Santiago, Chile, Millennium Institute of Astrophysics, Santiago, Chile
  10. Department of Astronomy and Astrophysics, University of Toronto, 50 St George St, Toronto, ON M5S 3H4, Canada
  11. South African Astronomical Observatory, PO Box 9, Observatory 7935, Cape Town, South Africa
  12. Astronomical Observatory, University of Warsaw, Al. Ujazdowskie 4, PL-00-478 Warszawa, Poland
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
1615693
Grant/Contract Number:  
SC0019323
Resource Type:
Published Article
Journal Name:
Monthly Notices of the Royal Astronomical Society
Additional Journal Information:
Journal Name: Monthly Notices of the Royal Astronomical Society Journal Volume: 494 Journal Issue: 2; Journal ID: ISSN 0035-8711
Publisher:
Oxford University Press
Country of Publication:
United Kingdom
Language:
English

Citation Formats

Neustadt, J. M. M., Holoien, T. W-S, Kochanek, C. S., Auchettl, K., Brown, J. S., Shappee, B. J., Pogge, R. W., Dong, Subo, Stanek, K. Z., Tucker, M. A., Bose, S., Chen, Ping, 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. To TDE or not to TDE: the luminous transient ASASSN-18jd with TDE-like and AGN-like qualities. United Kingdom: N. p., 2020. Web. doi:10.1093/mnras/staa859.
Neustadt, J. M. M., Holoien, T. W-S, Kochanek, C. S., Auchettl, K., Brown, J. S., Shappee, B. J., Pogge, R. W., Dong, Subo, Stanek, K. Z., Tucker, M. A., Bose, S., Chen, Ping, 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., & Payne, A. V. To TDE or not to TDE: the luminous transient ASASSN-18jd with TDE-like and AGN-like qualities. United Kingdom. doi:https://doi.org/10.1093/mnras/staa859
Neustadt, J. M. M., Holoien, T. W-S, Kochanek, C. S., Auchettl, K., Brown, J. S., Shappee, B. J., Pogge, R. W., Dong, Subo, Stanek, K. Z., Tucker, M. A., Bose, S., Chen, Ping, 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. Sat . "To TDE or not to TDE: the luminous transient ASASSN-18jd with TDE-like and AGN-like qualities". United Kingdom. doi:https://doi.org/10.1093/mnras/staa859.
@article{osti_1615693,
title = {To TDE or not to TDE: the luminous transient ASASSN-18jd with TDE-like and AGN-like qualities},
author = {Neustadt, J. M. M. and Holoien, T. W-S and Kochanek, C. S. and Auchettl, K. and Brown, J. S. and Shappee, B. J. and Pogge, R. W. and Dong, Subo and Stanek, K. Z. and Tucker, M. A. and Bose, S. and Chen, Ping and Ricci, C. and Vallely, P. J. and Prieto, J. L. and Thompson, T. A. and Coulter, D. A. and Drout, M. R. and Foley, R. J. and Kilpatrick, C. D. and Piro, A. L. and Rojas-Bravo, C. and Buckley, D. A. H. and Gromadzki, M. and Dimitriadis, G. and Siebert, M. R. and Do, A. and Huber, M. E. and Payne, A. V.},
abstractNote = {ABSTRACT 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 $T \sim 2.5 \times 10^{4} \, {\rm K}$, 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).},
doi = {10.1093/mnras/staa859},
journal = {Monthly Notices of the Royal Astronomical Society},
number = 2,
volume = 494,
place = {United Kingdom},
year = {2020},
month = {4}
}

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DOI: https://doi.org/10.1093/mnras/staa859

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journal, December 1985

  • Netzer, H.; Elitzur, M.; Ferland, G. J.
  • The Astrophysical Journal, Vol. 299
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iPTF Discovery of the Rapid “Turn-on” of a Luminous Quasar
journal, January 2017


1ES 1927+654: An AGN Caught Changing Look on a Timescale of Months
journal, September 2019

  • Trakhtenbrot, Benny; Arcavi, Iair; MacLeod, Chelsea L.
  • The Astrophysical Journal, Vol. 883, Issue 1
  • DOI: 10.3847/1538-4357/ab39e4

Prime Focus Imaging Spectrograph for the Southern African Large Telescope: optical design
conference, March 2003

  • Burgh, Eric B.; Nordsieck, Kenneth H.; Kobulnicky, Henry A.
  • Astronomical Telescopes and Instrumentation, SPIE Proceedings
  • DOI: 10.1117/12.460312

Understanding extreme quasar optical variability with CRTS – I. Major AGN flares
journal, June 2017

  • Graham, Matthew J.; Djorgovski, S. G.; Drake, Andrew J.
  • Monthly Notices of the Royal Astronomical Society, Vol. 470, Issue 4
  • DOI: 10.1093/mnras/stx1456

Prime focus imaging spectrograph for the Southern African large telescope: operational modes
conference, March 2003

  • Kobulnicky, Henry A.; Nordsieck, Kenneth H.; Burgh, Eric B.
  • Astronomical Telescopes and Instrumentation, SPIE Proceedings
  • DOI: 10.1117/12.460315

Composite Quasar Spectra from the Sloan Digital Sky Survey
journal, August 2001

  • Vanden Berk, Daniel E.; Richards, Gordon T.; Bauer, Amanda
  • The Astronomical Journal, Vol. 122, Issue 2
  • DOI: 10.1086/321167

The Two Micron All Sky Survey (2MASS)
journal, February 2006

  • Skrutskie, M. F.; Cutri, R. M.; Stiening, R.
  • The Astronomical Journal, Vol. 131, Issue 2
  • DOI: 10.1086/498708

Hello darkness my old friend: the fading of the nearby TDE ASASSN-14ae
journal, August 2016

  • Brown, Jonathan S.; Shappee, Benjamin J.; Holoien, T. W. -S.
  • Monthly Notices of the Royal Astronomical Society, Vol. 462, Issue 4
  • DOI: 10.1093/mnras/stw1928

X-ray spectral properties of active galactic nuclei in the Chandra Deep Field South
journal, May 2006


ASASSN-14ae: a tidal disruption event at 200 Mpc
journal, October 2014

  • Holoien, T. W. -S.; Prieto, J. L.; Bersier, D.
  • Monthly Notices of the Royal Astronomical Society, Vol. 445, Issue 3
  • DOI: 10.1093/mnras/stu1922

The unusual late-time evolution of the tidal disruption event ASASSN-15oi
journal, August 2018

  • Holoien, T. W-S; Brown, J. S.; Auchettl, K.
  • Monthly Notices of the Royal Astronomical Society, Vol. 480, Issue 4
  • DOI: 10.1093/mnras/sty2273

First Results from the Catalina Real-Time Transient Survey
journal, April 2009


WISeREP—An Interactive Supernova Data Repository
journal, July 2012

  • Yaron, Ofer; Gal-Yam, Avishay
  • Publications of the Astronomical Society of the Pacific, Vol. 124, Issue 917
  • DOI: 10.1086/666656

LATE TIME MULTI-WAVELENGTH OBSERVATIONS OF SWIFT J1644+5734: A LUMINOUS OPTICAL/IR BUMP AND QUIESCENT X-RAY EMISSION
journal, February 2016


The Galaxy Evolution Explorer : A Space Ultraviolet Survey Mission
journal, January 2005

  • Martin, D. Christopher; Fanson, James; Schiminovich, David
  • The Astrophysical Journal, Vol. 619, Issue 1
  • DOI: 10.1086/426387

A New Class of Changing-look LINERs
journal, September 2019

  • Frederick, Sara; Gezari, Suvi; Graham, Matthew J.
  • The Astrophysical Journal, Vol. 883, Issue 1
  • DOI: 10.3847/1538-4357/ab3a38

Transient Superstrong Coronal Lines and Broad Bumps in the Galaxy sdss J074820.67+471214.3
journal, October 2011


A Comparison of the X-Ray Emission from Tidal Disruption Events with those of Active Galactic Nuclei
journal, January 2018

  • Auchettl, Katie; Ramirez-Ruiz, Enrico; Guillochon, James
  • The Astrophysical Journal, Vol. 852, Issue 1
  • DOI: 10.3847/1538-4357/aa9b7c

The Space Telescope Imaging Spectrograph Design
journal, October 1998

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  • Publications of the Astronomical Society of the Pacific, Vol. 110, Issue 752
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New Physical Insights about Tidal Disruption Events from a Comprehensive Observational Inventory at X-Ray Wavelengths
journal, April 2017

  • Auchettl, Katie; Guillochon, James; Ramirez-Ruiz, Enrico
  • The Astrophysical Journal, Vol. 838, Issue 2
  • DOI: 10.3847/1538-4357/aa633b

The ultraviolet spectroscopic evolution of the low-luminosity tidal disruption event iPTF16fnl
journal, September 2017

  • Brown, J. S.; Kochanek, C. S.; Holoien, T. W. -S.
  • Monthly Notices of the Royal Astronomical Society, Vol. 473, Issue 1
  • DOI: 10.1093/mnras/stx2372

THE GALEX TIME DOMAIN SURVEY. II. WAVELENGTH-DEPENDENT VARIABILITY OF ACTIVE GALACTIC NUCLEI IN THE PAN-STARRS1 MEDIUM DEEP SURVEY
journal, December 2016


ANALYSIS OF OPTICAL Fe II EMISSION IN A SAMPLE OF ACTIVE GALACTIC NUCLEUS SPECTRA
journal, June 2010

  • Kovačević, Jelena; Popović, Luka Č.; Dimitrijević, Milan S.
  • The Astrophysical Journal Supplement Series, Vol. 189, Issue 1
  • DOI: 10.1088/0067-0049/189/1/15

The Wide-Field Infrared Survey Explorer (Wise): Mission Description and Initial On-Orbit Performance
journal, November 2010


The Long Term Evolution of ASASSN-14li
journal, January 2017

  • Brown, J. S.; Holoien, T. W. -S.; Auchettl, K.
  • Monthly Notices of the Royal Astronomical Society
  • DOI: 10.1093/mnras/stx033

Central Masses and Broad‐Line Region Sizes of Active Galactic Nuclei. II. A Homogeneous Analysis of a Large Reverberation‐Mapping Database
journal, October 2004

  • Peterson, B. M.; Ferrarese, L.; Gilbert, K. M.
  • The Astrophysical Journal, Vol. 613, Issue 2
  • DOI: 10.1086/423269

Tidal disruption of stars by black holes of 106–108 solar masses in nearby galaxies
journal, June 1988