An Off-Nuclear Tidal Disruption Event Discovered At Late Times: The Case Of TDE 2023mfm

@misc{sfaradi2026offnuclear,
  title = {{An Off-Nuclear Tidal Disruption Event Discovered At Late Times: The Case Of TDE 2023mfm}},
  author = {Itai Sfaradi and Ryan Chornock and Yuhan Yao and Erica Hammerstein and Jean Somalwar and Raffaella Margutti and Huei Sears and Robert Stein and Natalie LeBaron and Adelle J. Goodwin and Sjoert van Velzen and Matthew J. Graham and Kate D. Alexander and Nayana A. J. and Edo Berger and Jonathan Carney and Yvette Cendes and Collin T. Christy and Walter W. Golay and Wenbin Lu and James C. A. Miller-Jones and Charlotte Ward and Eli Wiston and Tracy X. Chen and Mansi M. Kasliwal and Frank J. Masci and Jesper Sollerman},
  howpublished = {arXiv},
  year = {2026},
  month = sep,
  doi = {10.48550/arxiv.2609.35998},
  eprint = {2609.35998},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2609.35998},
}

TY  - UNPB
TI  - An Off-Nuclear Tidal Disruption Event Discovered At Late Times: The Case Of TDE 2023mfm
AU  - Itai Sfaradi
AU  - Ryan Chornock
AU  - Yuhan Yao
AU  - Erica Hammerstein
AU  - Jean Somalwar
AU  - Raffaella Margutti
AU  - Huei Sears
AU  - Robert Stein
AU  - Natalie LeBaron
AU  - Adelle J. Goodwin
AU  - Sjoert van Velzen
AU  - Matthew J. Graham
AU  - Kate D. Alexander
AU  - Nayana A. J.
AU  - Edo Berger
AU  - Jonathan Carney
AU  - Yvette Cendes
AU  - Collin T. Christy
AU  - Walter W. Golay
AU  - Wenbin Lu
AU  - James C. A. Miller-Jones
AU  - Charlotte Ward
AU  - Eli Wiston
AU  - Tracy X. Chen
AU  - Mansi M. Kasliwal
AU  - Frank J. Masci
AU  - Jesper Sollerman
PY  - 2026
DA  - 2026/09/28
PB  - arXiv
DO  - 10.48550/arxiv.2609.35998
UR  - https://arxiv.org/abs/2609.35998
AB  - We present the discovery and analysis of the optically selected tidal disruption event (TDE) 2023mfm, which originates from a wandering massive black hole (MBH) in a massive (∼ 10^11M_⊙) galaxy hosting a central low-luminosity active galactic nucleus (AGN). Our analysis of the ZTF, Lick, Keck, Swift, Chandra, XMM-Newton, HST, and VLA observations reveals that TDE 2023mfm is a TDE-H from a 10^6.2 ± 0.5M_⊙ black hole which is offset by 0.66 ± 0.02" from the center of its host galaxy, corresponding to a projected distance of 1.08 ± 0.04 kpc. TDE 2023mfm displays all the traits of optically selected TDEs. The emission remains hot, T_bb ∼ 22,000 ± 1,000 K, for more than a month after peak, and the g-band light curve peaks at ( 2.24^+0.10 _−0.11 ) × 10^43 erg s^−1 and stays above half-maximum luminosity for 47.8^+3.7_−3.5 days. The late-time optical-to-UV emission observed with the HST suggests the presence of an unresolved stellar population with a stellar mass of 10^7−10^8M_⊙ at the position of the TDE, possibly being a low-mass dwarf galaxy or a stripped galaxy from a previous minor merger. The radio emission from TDE 2023mfm emerges at least a year after optical discovery, and we find it likely that it originates from a delayed outflow, however, further observations are needed to determine its true origin.
ER  -