TDEs on FIRE: Illuminating the Cosmic Evolution of Tidal Disruption Rates

@misc{chowdhury2026tdes,
  title = {{TDEs on FIRE: Illuminating the Cosmic Evolution of Tidal Disruption Rates}},
  author = {Rudrani Kar Chowdhury and Lixin Dai and Janet N. Y. Chang and Tsang Keung Chan},
  howpublished = {arXiv},
  year = {2026},
  month = oct,
  doi = {10.48550/arxiv.2606.04740},
  eprint = {2606.04740},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2606.04740},
  note = {CC BY 4.0},
}

TY  - UNPB
TI  - TDEs on FIRE: Illuminating the Cosmic Evolution of Tidal Disruption Rates
AU  - Rudrani Kar Chowdhury
AU  - Lixin Dai
AU  - Janet N. Y. Chang
AU  - Tsang Keung Chan
PY  - 2026
DA  - 2026/10/29
PB  - arXiv
DO  - 10.48550/arxiv.2606.04740
UR  - https://arxiv.org/abs/2606.04740
AB  - Tidal disruption events have been extensively studied in the local universe, but their prevalence at high redshifts remains largely unexplored. Using the FIRE-2 cosmological zoom-in simulations, we compute the per-galaxy tidal disruption rate (TDR) over z=1−10, covering black holes from IMBHs to SMBHs. The averaged TDR rises from the early universe, peaks at ∼ 4 × 10^−4 gal^−1 yr^−1 near z ∼ 2.5, and declines to ∼ 10^−5 gal^−1 yr^−1 at z=1. The TDR correlates strongly with host galaxy star formation rate and central stellar density at all redshifts. Qualitatively, the TDR trends with the M_BH and M_gal persist from high redshift to the local universe, suggesting similar BH-galaxy scaling across cosmic time. Satellite galaxies exhibit comparably high TDRs, with their fractional contribution increasing significantly at high redshifts, highlighting their potential for probing IMBHs and early galaxy assembly. This work demonstrates that cosmological simulations offer a promising avenue for constraining the cosmic evolution of the TDR, paving the way for future comparisons with next-generation observations.
ER  -