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The Rise and Fall of ASASSN-18pg: Following a TDE from Early to Late Times

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The Rise and Fall of ASASSN-18pg: Following a TDE from Early to Late Times. / Holoien, Thomas W.S.; Auchettl, Katie; Tucker, Michael A. et al.
In: Astrophysical Journal, Vol. 898, No. 2, 161, 04.08.2020.

Research output: Contribution to Journal/Magazine › Journal article › peer-review

Harvard

Holoien, TWS, Auchettl, K, Tucker, MA, Shappee, BJ, Patel, SG, Miller-Jones, JCA, Mockler, B, Groenewald, DLN, Hinkle, JT, Brown, JS, Kochanek, CS, Stanek, KZ, Chen, P, Dong, S, Prieto, JL, Thompson, TA, Beaton, RL, Connor, T, Cowperthwaite, PS, Dahmen, L, French, KD, Morrell, N, Buckley, DAH, Gromadzki, M, Roy, R, Coulter, DA, Dimitriadis, G, Foley, RJ, Kilpatrick, CD, Piro, AL, Rojas-Bravo, C, Siebert, MR & Velzen, SV 2020, 'The Rise and Fall of ASASSN-18pg: Following a TDE from Early to Late Times', Astrophysical Journal, vol. 898, no. 2, 161. https://doi.org/10.3847/1538-4357/ab9f3d

APA

Holoien, T. W. S., Auchettl, K., Tucker, M. A., Shappee, B. J., Patel, S. G., Miller-Jones, J. C. A., Mockler, B., Groenewald, D. L. N., Hinkle, J. T., Brown, J. S., Kochanek, C. S., Stanek, K. Z., Chen, P., Dong, S., Prieto, J. L., Thompson, T. A., Beaton, R. L., Connor, T., Cowperthwaite, P. S., ... Velzen, S. V. (2020). The Rise and Fall of ASASSN-18pg: Following a TDE from Early to Late Times. Astrophysical Journal, 898(2), Article 161. https://doi.org/10.3847/1538-4357/ab9f3d

Vancouver

Holoien TWS, Auchettl K, Tucker MA, Shappee BJ, Patel SG, Miller-Jones JCA et al. The Rise and Fall of ASASSN-18pg: Following a TDE from Early to Late Times. Astrophysical Journal. 2020 Aug 4;898(2):161. doi: 10.3847/1538-4357/ab9f3d

Author

Holoien, Thomas W.S. ; Auchettl, Katie ; Tucker, Michael A. et al. / The Rise and Fall of ASASSN-18pg : Following a TDE from Early to Late Times. In: Astrophysical Journal. 2020 ; Vol. 898, No. 2.

Bibtex

@article{efba7ca641924c22b24a92c7fb648766,
title = "The Rise and Fall of ASASSN-18pg: Following a TDE from Early to Late Times",
abstract = "We present nearly 500 days of observations of the tidal disruption event (TDE) ASASSN-18pg, spanning from 54 days before peak light to 441 days after peak light. Our data set includes X-ray, UV, and optical photometry, optical spectroscopy, radio observations, and the first published spectropolarimetric observations of a TDE. ASASSN-18pg was discovered on 2018 July 11 by the All-Sky Automated Survey for Supernovae (ASAS-SN) at a distance of d = 78.6 Mpc; with a peak UV magnitude of m ≃ 14, it is both one of the nearest and brightest TDEs discovered to-date. The photometric data allow us to track both the rise to peak and the long-term evolution of the TDE. ASASSN-18pg peaked at a luminosity of L ≃ 2.4 1044 erg s-1, and its late-time evolution is shallower than a flux ∝t -5/3 power-law model, similar to what has been seen in other TDEs. ASASSN-18pg exhibited Balmer lines and spectroscopic features consistent with Bowen fluorescence prior to peak, which remained detectable for roughly 225 days after peak. Analysis of the two-component Hα profile indicates that, if they are the result of reprocessing of emission from the accretion disk, the different spectroscopic lines may be coming from regions between ∼10 and ∼60 lt-days from the black hole. No X-ray emission is detected from the TDE, and there is no evidence of a jet or strong outflow detected in the radio. Our spectropolarimetric observations indicate that the projected emission region is likely not significantly aspherical, with the projected emission region having an axis ratio of ⪆0.65.",
author = "Holoien, {Thomas W.S.} and Katie Auchettl and Tucker, {Michael A.} and Shappee, {Benjamin J.} and Patel, {Shannon G.} and Miller-Jones, {James C.A.} and Brenna Mockler and Groenewald, {Dani l.N.} and Hinkle, {Jason T.} and Brown, {Jonathan S.} and Kochanek, {Christopher S.} and Stanek, {K. Z.} and Ping Chen and Subo Dong and Prieto, {Jose L.} and Thompson, {Todd A.} and Beaton, {Rachael L.} and Thomas Connor and Cowperthwaite, {Philip S.} and Linnea Dahmen and French, {K. Decker} and Nidia Morrell and Buckley, {David A.H.} and Mariusz Gromadzki and Rupak Roy and Coulter, {David A.} and Georgios Dimitriadis and Foley, {Ryan J.} and Kilpatrick, {Charles D.} and Piro, {Anthony L.} and C{\'e}sar Rojas-Bravo and Siebert, {Matthew R.} and Velzen, {Sjoert van}",
note = "Publisher Copyright: {\textcopyright} 2020. The American Astronomical Society. All rights reserved..",
year = "2020",
month = aug,
day = "4",
doi = "10.3847/1538-4357/ab9f3d",
language = "English",
volume = "898",
journal = "Astrophysical Journal",
issn = "0004-637X",
publisher = "Institute of Physics Publishing",
number = "2",

}

RIS

TY - JOUR

T1 - The Rise and Fall of ASASSN-18pg

T2 - Following a TDE from Early to Late Times

AU - Holoien, Thomas W.S.

AU - Auchettl, Katie

AU - Tucker, Michael A.

AU - Shappee, Benjamin J.

AU - Patel, Shannon G.

AU - Miller-Jones, James C.A.

AU - Mockler, Brenna

AU - Groenewald, Dani l.N.

AU - Hinkle, Jason T.

AU - Brown, Jonathan S.

AU - Kochanek, Christopher S.

AU - Stanek, K. Z.

AU - Chen, Ping

AU - Dong, Subo

AU - Prieto, Jose L.

AU - Thompson, Todd A.

AU - Beaton, Rachael L.

AU - Connor, Thomas

AU - Cowperthwaite, Philip S.

AU - Dahmen, Linnea

AU - French, K. Decker

AU - Morrell, Nidia

AU - Buckley, David A.H.

AU - Gromadzki, Mariusz

AU - Roy, Rupak

AU - Coulter, David A.

AU - Dimitriadis, Georgios

AU - Foley, Ryan J.

AU - Kilpatrick, Charles D.

AU - Piro, Anthony L.

AU - Rojas-Bravo, César

AU - Siebert, Matthew R.

AU - Velzen, Sjoert van

N1 - Publisher Copyright: © 2020. The American Astronomical Society. All rights reserved..

PY - 2020/8/4

Y1 - 2020/8/4

N2 - We present nearly 500 days of observations of the tidal disruption event (TDE) ASASSN-18pg, spanning from 54 days before peak light to 441 days after peak light. Our data set includes X-ray, UV, and optical photometry, optical spectroscopy, radio observations, and the first published spectropolarimetric observations of a TDE. ASASSN-18pg was discovered on 2018 July 11 by the All-Sky Automated Survey for Supernovae (ASAS-SN) at a distance of d = 78.6 Mpc; with a peak UV magnitude of m ≃ 14, it is both one of the nearest and brightest TDEs discovered to-date. The photometric data allow us to track both the rise to peak and the long-term evolution of the TDE. ASASSN-18pg peaked at a luminosity of L ≃ 2.4 1044 erg s-1, and its late-time evolution is shallower than a flux ∝t -5/3 power-law model, similar to what has been seen in other TDEs. ASASSN-18pg exhibited Balmer lines and spectroscopic features consistent with Bowen fluorescence prior to peak, which remained detectable for roughly 225 days after peak. Analysis of the two-component Hα profile indicates that, if they are the result of reprocessing of emission from the accretion disk, the different spectroscopic lines may be coming from regions between ∼10 and ∼60 lt-days from the black hole. No X-ray emission is detected from the TDE, and there is no evidence of a jet or strong outflow detected in the radio. Our spectropolarimetric observations indicate that the projected emission region is likely not significantly aspherical, with the projected emission region having an axis ratio of ⪆0.65.

AB - We present nearly 500 days of observations of the tidal disruption event (TDE) ASASSN-18pg, spanning from 54 days before peak light to 441 days after peak light. Our data set includes X-ray, UV, and optical photometry, optical spectroscopy, radio observations, and the first published spectropolarimetric observations of a TDE. ASASSN-18pg was discovered on 2018 July 11 by the All-Sky Automated Survey for Supernovae (ASAS-SN) at a distance of d = 78.6 Mpc; with a peak UV magnitude of m ≃ 14, it is both one of the nearest and brightest TDEs discovered to-date. The photometric data allow us to track both the rise to peak and the long-term evolution of the TDE. ASASSN-18pg peaked at a luminosity of L ≃ 2.4 1044 erg s-1, and its late-time evolution is shallower than a flux ∝t -5/3 power-law model, similar to what has been seen in other TDEs. ASASSN-18pg exhibited Balmer lines and spectroscopic features consistent with Bowen fluorescence prior to peak, which remained detectable for roughly 225 days after peak. Analysis of the two-component Hα profile indicates that, if they are the result of reprocessing of emission from the accretion disk, the different spectroscopic lines may be coming from regions between ∼10 and ∼60 lt-days from the black hole. No X-ray emission is detected from the TDE, and there is no evidence of a jet or strong outflow detected in the radio. Our spectropolarimetric observations indicate that the projected emission region is likely not significantly aspherical, with the projected emission region having an axis ratio of ⪆0.65.

U2 - 10.3847/1538-4357/ab9f3d

DO - 10.3847/1538-4357/ab9f3d

M3 - Journal article

AN - SCOPUS:85094944512

VL - 898

JO - Astrophysical Journal

JF - Astrophysical Journal

SN - 0004-637X

IS - 2

M1 - 161

ER -