Discovery and follow-up of ASASSN-19dj: an X-ray and UV luminous TDE in an extreme post-starburst galaxy

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https://doi.org/10.1093/mnras/staa3170
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Discovery and follow-up of ASASSN-19dj: an X-ray and UV luminous TDE in an extreme post-starburst galaxy. / Hinkle, Jason T.; Holoien, T. W-S; Auchettl, K. et al.
In: Monthly Notices of the Royal Astronomical Society, Vol. 500, No. 2, 15.10.2020, p. 1673-1696.

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

Harvard

Hinkle, JT, Holoien, TW-S, Auchettl, K, Shappee, BJ, Neustadt, JMM, Payne, A, Brown, JS, Kochanek, CS, Stanek, KZ, Graham, MJ, Tucker, MA, Do, A, Anderson, JP, Bose, S, Chen, P, Coulter, DA, Dimitriadis, G, Dong, S, Foley, RJ, Huber, ME, Hung, T, Kilpatrick, CD, Pignata, G, Piro, AL, Rojas-Bravo, C, Siebert, MR, Stalder, B, Thompson, TA, Tonry, JL, Vallely, PJ & Wisniewski, JP 2020, 'Discovery and follow-up of ASASSN-19dj: an X-ray and UV luminous TDE in an extreme post-starburst galaxy', Monthly Notices of the Royal Astronomical Society, vol. 500, no. 2, pp. 1673-1696. https://doi.org/10.1093/mnras/staa3170

APA

Hinkle, J. T., Holoien, T. W.-S., Auchettl, K., Shappee, B. J., Neustadt, J. M. M., Payne, A., Brown, J. S., Kochanek, C. S., Stanek, K. Z., Graham, M. J., Tucker, M. A., Do, A., Anderson, J. P., Bose, S., Chen, P., Coulter, D. A., Dimitriadis, G., Dong, S., Foley, R. J., ... Wisniewski, J. P. (2020). Discovery and follow-up of ASASSN-19dj: an X-ray and UV luminous TDE in an extreme post-starburst galaxy. Monthly Notices of the Royal Astronomical Society, 500(2), 1673-1696. https://doi.org/10.1093/mnras/staa3170

Vancouver

Hinkle JT, Holoien TWS, Auchettl K, Shappee BJ, Neustadt JMM, Payne A et al. Discovery and follow-up of ASASSN-19dj: an X-ray and UV luminous TDE in an extreme post-starburst galaxy. Monthly Notices of the Royal Astronomical Society. 2020 Oct 15;500(2):1673-1696. doi: 10.1093/mnras/staa3170

Author

Hinkle, Jason T. ; Holoien, T. W-S ; Auchettl, K. et al. / Discovery and follow-up of ASASSN-19dj: an X-ray and UV luminous TDE in an extreme post-starburst galaxy. In: Monthly Notices of the Royal Astronomical Society. 2020 ; Vol. 500, No. 2. pp. 1673-1696.

Bibtex

@article{24b4dc832be143fc9af7328763274f20,

title = "Discovery and follow-up of ASASSN-19dj: an X-ray and UV luminous TDE in an extreme post-starburst galaxy",

abstract = "We present observations of ASASSN-19dj, a nearby tidal disruption event (TDE) discovered in the post-starburst galaxy KUG 0810+227 by the All-Sky Automated Survey for Supernovae (ASAS-SN) at a distance of d ≃ 98 Mpc. We observed ASASSN-19dj from -21 to 392 d relative to peak ultraviolet (UV)/optical emission using high-cadence, multiwavelength spectroscopy and photometry. From the ASAS-SN g-band data, we determine that the TDE began to brighten on 2019 February 6.8 and for the first 16 d the rise was consistent with a flux α2 power law. ASASSN-19dj peaked in the UV/optical on 2019 March 6.5 (MJD = 58548.5) at a bolometric luminosity of L = (6.2 ± 0.2) × 1044 erg s-1. Initially remaining roughly constant in X-rays and slowly fading in the UV/optical, the X-ray flux increased by over an order of magnitude ∼225 d after peak, resulting from the expansion of the X-ray emitting region. The late-time X-ray emission is well fitted by a blackbody with an effective radius of ∼1 × 1012 cm and a temperature of ∼6 × 105 K. The X-ray hardness ratio becomes softer after brightening and then returns to a harder state as the X-rays fade. Analysis of Catalina Real-Time Transient Survey images reveals a nuclear outburst roughly 14.5 yr earlier with a smooth decline and a luminosity of LV ≥ 1.4 × 1043 erg s-1, although the nature of the flare is unknown. ASASSN-19dj occurred in the most extreme post-starburst galaxy yet to host a TDE, with Lick HδA = 7.67 ± 0.17 {\AA}.",

author = "Hinkle, {Jason T.} and Holoien, {T. W-S} and K. Auchettl and Shappee, {B. J.} and Neustadt, {J. M. M.} and A. Payne and Brown, {J. S.} and Kochanek, {C. S.} and Stanek, {K. Z.} and Graham, {M. J.} and Tucker, {M. A.} and A. Do and Anderson, {J. P.} and S. Bose and P. Chen and Coulter, {D. A.} and G. Dimitriadis and Subo Dong and Foley, {R. J.} and Huber, {M. E.} and T. Hung and Kilpatrick, {C. D.} and G. Pignata and Piro, {A. L.} and C. Rojas-Bravo and Siebert, {M. R.} and B. Stalder and Thompson, {Todd A.} and Tonry, {J. L.} and Vallely, {P. J.} and Wisniewski, {J. P.}",

year = "2020",

month = oct,

day = "15",

doi = "10.1093/mnras/staa3170",

language = "English",

volume = "500",

pages = "1673--1696",

journal = "Monthly Notices of the Royal Astronomical Society",

issn = "0035-8711",

publisher = "OXFORD UNIV PRESS",

number = "2",

}

RIS

TY - JOUR

T1 - Discovery and follow-up of ASASSN-19dj: an X-ray and UV luminous TDE in an extreme post-starburst galaxy

AU - Hinkle, Jason T.

AU - Holoien, T. W-S

AU - Auchettl, K.

AU - Shappee, B. J.

AU - Neustadt, J. M. M.

AU - Payne, A.

AU - Brown, J. S.

AU - Kochanek, C. S.

AU - Stanek, K. Z.

AU - Graham, M. J.

AU - Tucker, M. A.

AU - Do, A.

AU - Anderson, J. P.

AU - Bose, S.

AU - Chen, P.

AU - Coulter, D. A.

AU - Dimitriadis, G.

AU - Dong, Subo

AU - Foley, R. J.

AU - Huber, M. E.

AU - Hung, T.

AU - Kilpatrick, C. D.

AU - Pignata, G.

AU - Piro, A. L.

AU - Rojas-Bravo, C.

AU - Siebert, M. R.

AU - Stalder, B.

AU - Thompson, Todd A.

AU - Tonry, J. L.

AU - Vallely, P. J.

AU - Wisniewski, J. P.

PY - 2020/10/15

Y1 - 2020/10/15

N2 - We present observations of ASASSN-19dj, a nearby tidal disruption event (TDE) discovered in the post-starburst galaxy KUG 0810+227 by the All-Sky Automated Survey for Supernovae (ASAS-SN) at a distance of d ≃ 98 Mpc. We observed ASASSN-19dj from -21 to 392 d relative to peak ultraviolet (UV)/optical emission using high-cadence, multiwavelength spectroscopy and photometry. From the ASAS-SN g-band data, we determine that the TDE began to brighten on 2019 February 6.8 and for the first 16 d the rise was consistent with a flux α2 power law. ASASSN-19dj peaked in the UV/optical on 2019 March 6.5 (MJD = 58548.5) at a bolometric luminosity of L = (6.2 ± 0.2) × 1044 erg s-1. Initially remaining roughly constant in X-rays and slowly fading in the UV/optical, the X-ray flux increased by over an order of magnitude ∼225 d after peak, resulting from the expansion of the X-ray emitting region. The late-time X-ray emission is well fitted by a blackbody with an effective radius of ∼1 × 1012 cm and a temperature of ∼6 × 105 K. The X-ray hardness ratio becomes softer after brightening and then returns to a harder state as the X-rays fade. Analysis of Catalina Real-Time Transient Survey images reveals a nuclear outburst roughly 14.5 yr earlier with a smooth decline and a luminosity of LV ≥ 1.4 × 1043 erg s-1, although the nature of the flare is unknown. ASASSN-19dj occurred in the most extreme post-starburst galaxy yet to host a TDE, with Lick HδA = 7.67 ± 0.17 Å.

AB - We present observations of ASASSN-19dj, a nearby tidal disruption event (TDE) discovered in the post-starburst galaxy KUG 0810+227 by the All-Sky Automated Survey for Supernovae (ASAS-SN) at a distance of d ≃ 98 Mpc. We observed ASASSN-19dj from -21 to 392 d relative to peak ultraviolet (UV)/optical emission using high-cadence, multiwavelength spectroscopy and photometry. From the ASAS-SN g-band data, we determine that the TDE began to brighten on 2019 February 6.8 and for the first 16 d the rise was consistent with a flux α2 power law. ASASSN-19dj peaked in the UV/optical on 2019 March 6.5 (MJD = 58548.5) at a bolometric luminosity of L = (6.2 ± 0.2) × 1044 erg s-1. Initially remaining roughly constant in X-rays and slowly fading in the UV/optical, the X-ray flux increased by over an order of magnitude ∼225 d after peak, resulting from the expansion of the X-ray emitting region. The late-time X-ray emission is well fitted by a blackbody with an effective radius of ∼1 × 1012 cm and a temperature of ∼6 × 105 K. The X-ray hardness ratio becomes softer after brightening and then returns to a harder state as the X-rays fade. Analysis of Catalina Real-Time Transient Survey images reveals a nuclear outburst roughly 14.5 yr earlier with a smooth decline and a luminosity of LV ≥ 1.4 × 1043 erg s-1, although the nature of the flare is unknown. ASASSN-19dj occurred in the most extreme post-starburst galaxy yet to host a TDE, with Lick HδA = 7.67 ± 0.17 Å.

UR - https://publons.com/wos-op/publon/38926400/

U2 - 10.1093/mnras/staa3170

DO - 10.1093/mnras/staa3170

M3 - Journal article

VL - 500

SP - 1673

EP - 1696

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

SN - 0035-8711

IS - 2

ER -

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