Co-evolution of AGN and Host Galaxies across Cosmic Time Using JWST data

@misc{jalan2026coevolution,
  title = {{Co-evolution of AGN and Host Galaxies across Cosmic Time Using JWST data}},
  author = {Priyanka Jalan and Tomotsugu Goto and Tetsuya Hashimoto and Angel Rodriguez Barbosa and Chih-Teng Ling and Ece Kilerci and Terry Long Phan and Srivardini Ayyappan},
  howpublished = {arXiv},
  year = {2026},
  month = oct,
  doi = {10.48550/arxiv.2610.41584},
  eprint = {2610.41584},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2610.41584},
  note = {CC BY 4.0},
}

TY  - UNPB
TI  - Co-evolution of AGN and Host Galaxies across Cosmic Time Using JWST data
AU  - Priyanka Jalan
AU  - Tomotsugu Goto
AU  - Tetsuya Hashimoto
AU  - Angel Rodriguez Barbosa
AU  - Chih-Teng Ling
AU  - Ece Kilerci
AU  - Terry Long Phan
AU  - Srivardini Ayyappan
PY  - 2026
DA  - 2026/10/30
PB  - arXiv
DO  - 10.48550/arxiv.2610.41584
UR  - https://arxiv.org/abs/2610.41584
AB  - Understanding the complex co-evolution of active galactic nuclei (AGN) and their host galaxies across cosmic time remains a fundamental challenge, particularly in identifying how the physical drivers of galaxy diversity evolve from the early Universe to the present day. To understand this, we use a multi-wavelength JWST catalog of 2,709 sources cross-matched from the SMILES and JWST Advanced Deep Extragalactic Survey (JADES) surveys, spanning lookback times from 0.8 to 12.9 Gyr (0.05 <z <6). Using Pearson correlation matrix, we find AGN luminosity (L_AGN) strongly correlates (∼0.8) with star formation rate (SFR) and dust luminosity (L_dust), weakly correlates (∼0.5) with stellar mass (M_⋆) and anti-correlates (∼ −0.4) with star formation history (SFH) duration and stellar age (Age_⋆). However, the apparent anti-correlation observed between galaxy age and AGN luminosity is driven by cosmic time rather than by a direct physical connection. Using Principal Component Analysis (PCA), we find that galaxy diversity is fundamentally governed by two principal components: AGN and galaxy activity, and stellar age. At higher redshifts, AGN accretion, star formation, and dust emission are tightly synchronized, reflecting gas-rich conditions in the early Universe. In contrast, the present Universe exhibits a clear bimodal structure in host-dominated systems (f_AGN ≤ 0.2), separating quiescent and star-forming galaxies. Our results demonstrate that AGN luminosity is primarily governed by the host galaxy's current cold-gas supply, of which recent star formation is a close observational tracer, with galaxy mass setting the overall potential. This highlights a co-evolution scenario in which black hole growth and star formation are tightly linked, particularly at early cosmic epochs.
ER  -