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Peer-reviewedCC BY 4.0The Astrophysical Journal

KCWI Discovery of a Spatially Resolved Kiloparsec-scale Ionized Outflow in NGC 1275

  • Kylie Yui Dan1,2
  • Hanae Inami2
  • Thomas Bohn3
  • Sylvain Veilleux1
  • Vivian U4
  • Tianmu Gao5,6
  • Justin Kader4
  • Rosalie McGurk7
7 affiliations
  1. 1University of Maryland
  2. 2Hiroshima University
  3. 3Ehime University
  4. 4California Institute of Technology
  5. 5Australian National University
  6. 6ARC Centre of Excellence for All Sky Astrophysics in 3 Dimensions (ASTRO 3D)
  7. 7W. M. Keck Observatory
Open at sourcePDFDOICite

Abstract

We present new Keck Cosmic Web Imager (KCWI) observations of the central few kiloparsecs of NGC 1275, 2023ascl.soft01019Nvthe brightest cluster galaxy of the Perseus Cluster. These integral field spectroscopic data reveal a warm-ionized outflow traced by H β 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 ⁻¹ , w ₈₀ of up to 3780 km s ⁻¹ , and H β -derived outflowing mass of (2.7 ± 0.3) × 10 ⁶ M ⊙ . Our H β -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 parsec-scale cold gas feeding the active galactic nucleus (AGN) and the warm wind accelerated out to kiloparsec scales. In the host galaxy, we detect an enhancement in the [O III ]/H β 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 ]/H β 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 ]/H β 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 kiloparsec-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.

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Cite

BibTeXRIS
BibTeX
@article{dan2026kcwi,
  title = {{KCWI Discovery of a Spatially Resolved Kiloparsec-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},
  journal = {The Astrophysical Journal},
  year = {2026},
  month = oct,
  doi = {10.3847/1538-4357/aea13d},
  url = {https://iopscience.iop.org/article/10.3847/1538-4357/aea13d},
  note = {CC BY 4.0},
}
RIS
TY  - JOUR
TI  - KCWI Discovery of a Spatially Resolved Kiloparsec-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  - 2026/10/14
JO  - The Astrophysical Journal
DO  - 10.3847/1538-4357/aea13d
UR  - https://iopscience.iop.org/article/10.3847/1538-4357/aea13d
AB  - We present new Keck Cosmic Web Imager (KCWI) observations of the central few kiloparsecs of NGC 1275, 2023ascl.soft01019Nvthe brightest cluster galaxy of the Perseus Cluster. These integral field spectroscopic data reveal a warm-ionized outflow traced by H β 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 ⁻¹ , w ₈₀ of up to 3780 km s ⁻¹ , and H β -derived outflowing mass of (2.7 ± 0.3) × 10 ⁶ M ⊙ . Our H β -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 parsec-scale cold gas feeding the active galactic nucleus (AGN) and the warm wind accelerated out to kiloparsec scales. In the host galaxy, we detect an enhancement in the [O III ]/H β 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 ]/H β 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 ]/H β 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 kiloparsec-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.
SN  - 0004-637X
SN  - 1538-4357
ER  -