KCWI Discovery of a Spatially Resolved Kpc-Scale Ionized Outflow in NGC 1275

@misc{dan2026kcwi,
  title = {{KCWI Discovery of a Spatially Resolved Kpc-Scale Ionized Outflow in NGC 1275}},
  author = {Kylie Yui Dan and Hanae Inami and Thomas Bohn and Sylvain Veilleux and Vivian U and Tianmu Gao and Justin Kader and Rosalie McGurk},
  howpublished = {arXiv},
  year = {2026},
  month = aug,
  doi = {10.48550/arxiv.2608.08331},
  eprint = {2608.08331},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2608.08331},
  note = {CC BY 4.0},
}

TY  - UNPB
TI  - KCWI Discovery of a Spatially Resolved Kpc-Scale Ionized Outflow in NGC 1275
AU  - Kylie Yui Dan
AU  - Hanae Inami
AU  - Thomas Bohn
AU  - Sylvain Veilleux
AU  - Vivian U
AU  - Tianmu Gao
AU  - Justin Kader
AU  - Rosalie McGurk
PY  - 2026
DA  - 2026/08/08
PB  - arXiv
DO  - 10.48550/arxiv.2608.08331
UR  - https://arxiv.org/abs/2608.08331
AB  - We present new Keck Cosmic Web Imager observations of the central few kiloparsecs of NGC 1275, the brightest cluster galaxy of the Perseus Cluster. These integral field spectroscopic data reveal a warm-ionized outflow traced by Hβ and the [O III] doublet extending out to ∼2.5 kpc from the nucleus. The warm-ionized outflow has an [O III]-derived v_50 of up to ∼570 km/s, w_80 of up to $3780$ km/s, and Hβ-derived outflowing mass of (2.7 ± 0.3)× 10^6 M_⊙. Our Hβ-derived warm-ionized outflowing mass rate of 2.7±0.7 M_⊙ yr^−1 is comparable to the estimated cold molecular disk accretion rate of 1−10 M_⊙ yr^−1, which could be a sign of self-regulation between the pc-scale cold gas feeding the active galactic nucleus (AGN) and the warm wind accelerated out to kpc scales. In the host galaxy, we detect an enhancement in the [O III] / Hβ ratio in the direction of the receding jet, which may imply jet interaction with the host interstellar medium. The outflow component also shows a clear enhancement of [O III] / Hβ that positively correlates with w_80 and v_50, indicative of AGN influence and/or fast shocks. Both the outflow and host galaxy [O III] / Hβ ratio decrease with increasing distance from the center, showing that the influence of the AGN is confined to the central ∼2 kpc. These results are the first resolved measurements of a kpc-scale ionized wind in NGC 1275 and provide a view into how both jets and winds contribute to the feedback cycles in complex cool core cluster systems.
ER  -