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High-spectral-resolution Observations of the Optical Filamentary Nebula Surrounding NGC 1275

Vigneron, Benjamin; Hlavacek-Larrondo, Julie; Rhea, Carter Lee; Gendron-Marsolais, Marie-Lou; Lim, Jeremy; Reinheimer, Jake; Li, Yuan; Drissen, Laurent; Bryan, Greg L.; Donahue, Megan; Edge, Alastair; Fabian, Andrew; Hamer, Stephen; Martin, Thomas; McDonald, Michael; McNamara, Brian; Richard-Lafferrière, Annabelle; Rousseau-Nepton, Laurie; Voit, G. Mark; Webb, Tracy; Werner, Norbert

High-spectral-resolution Observations of the Optical Filamentary Nebula Surrounding NGC 1275 Thumbnail


Authors

Benjamin Vigneron

Julie Hlavacek-Larrondo

Carter Lee Rhea

Marie-Lou Gendron-Marsolais

Jeremy Lim

Jake Reinheimer

Yuan Li

Laurent Drissen

Greg L. Bryan

Megan Donahue

Andrew Fabian

Stephen Hamer

Thomas Martin

Michael McDonald

Brian McNamara

Annabelle Richard-Lafferrière

Laurie Rousseau-Nepton

G. Mark Voit

Tracy Webb

Norbert Werner



Abstract

We present new high-spectral-resolution observations (R = λ/Δλ = 7000) of the filamentary nebula surrounding NGC 1275, the central galaxy of the Perseus cluster. These observations have been obtained with SITELLE, an imaging Fourier transform spectrometer installed on the Canada–France–Hawai Telescope with a field of view of 11′×11′ , encapsulating the entire filamentary structure of ionized gas despite its large size of 80 kpc × 50 kpc. Here, we present renewed fluxes, velocities, and velocity dispersion maps that show in great detail the kinematics of the optical nebula at [S ii] λ6716, [S ii] λ6731, [N ii] λ6584, Hα (6563 Å), and [N ii] λ6548. These maps reveal the existence of a bright flattened disk-shaped structure in the core extending to r ∼10 kpc and dominated by a chaotic velocity field. This structure is located in the wake of X-ray cavities and characterized by a high mean velocity dispersion of 134 km s−1. The disk-shaped structure is surrounded by an extended array of filaments spread out to r ∼ 50 kpc that are 10 times fainter in flux, remarkably quiescent, and have a uniform mean velocity dispersion of 44 km s−1. This stability is puzzling given that the cluster core exhibits several energetic phenomena. Based on these results, we argue that there are two mechanisms that form multiphase gas in clusters of galaxies: a first triggered in the wake of X-ray cavities leading to more turbulent multiphase gas and a second, distinct mechanism, that is gentle and leads to large-scale multiphase gas spreading throughout the core.

Citation

Vigneron, B., Hlavacek-Larrondo, J., Rhea, C. L., Gendron-Marsolais, M., Lim, J., Reinheimer, J., …Werner, N. (2024). High-spectral-resolution Observations of the Optical Filamentary Nebula Surrounding NGC 1275. Astrophysical Journal, 962(1), Article 96. https://doi.org/10.3847/1538-4357/ad0fd8

Journal Article Type Article
Acceptance Date Nov 24, 2023
Online Publication Date Feb 9, 2024
Publication Date Feb 1, 2024
Deposit Date Feb 12, 2024
Publicly Available Date Feb 14, 2024
Journal The Astrophysical Journal
Print ISSN 0004-637X
Publisher American Astronomical Society
Peer Reviewed Peer Reviewed
Volume 962
Issue 1
Article Number 96
DOI https://doi.org/10.3847/1538-4357/ad0fd8
Keywords Filamentary nebulae, Perseus Cluster, Brightest cluster galaxies, AGN host galaxies, Active galaxies
Public URL https://durham-repository.worktribe.com/output/2234590

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