High-Spectral Resolution Observations of the Optical Filamentary Nebula in NGC 1275
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| Format: | Preprint |
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2023
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| author | 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-Lafferriere, Annabelle Rousseau-Nepton, Laurie Voit, G. Mark Webb, Tracy Werner, Norbert |
| author_facet | 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-Lafferriere, Annabelle Rousseau-Nepton, Laurie Voit, G. Mark Webb, Tracy Werner, Norbert |
| contents | 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 (CFHT) with a field of view of $11\text{ arcmin }\times 11 \text{ arcmin}$ encapsulating the entire filamentary structure of ionised gas despite its large size of $80 \text{ kpc}\times50 \text{ kpc}$. Here, we present renewed flux, velocity and velocity dispersion maps that show in great detail the kinematics of the optical nebula at \sii$\lambda6716$, \sii$\lambda6731$, \nii$\lambda6584$, H$α$(6563Å), and \nii$\lambda6548$. These maps reveal the existence of a bright flattened disk-shaped structure in the core extending to r $\sim 10$ kpc and dominated by a chaotic velocity field. This structure is located in the wake of X-ray cavities and characterised by a high mean velocity dispersion of $134$ km/s. The disk-shaped structure is surrounded by an extended array of filaments spread out to $r\sim 50$ kpc that are 10 times fainter in flux, remarkably quiescent and has a uniform mean velocity dispersion of $44$ km/s. This stability is puzzling given that the cluster core exhibits several energetic phenomena. Based on these results, we argue that there are two mechanisms to 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 spread throughout the core. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2311_16247 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | High-Spectral Resolution Observations of the Optical Filamentary Nebula in 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-Lafferriere, Annabelle Rousseau-Nepton, Laurie Voit, G. Mark Webb, Tracy Werner, Norbert Astrophysics of Galaxies 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 (CFHT) with a field of view of $11\text{ arcmin }\times 11 \text{ arcmin}$ encapsulating the entire filamentary structure of ionised gas despite its large size of $80 \text{ kpc}\times50 \text{ kpc}$. Here, we present renewed flux, velocity and velocity dispersion maps that show in great detail the kinematics of the optical nebula at \sii$\lambda6716$, \sii$\lambda6731$, \nii$\lambda6584$, H$α$(6563Å), and \nii$\lambda6548$. These maps reveal the existence of a bright flattened disk-shaped structure in the core extending to r $\sim 10$ kpc and dominated by a chaotic velocity field. This structure is located in the wake of X-ray cavities and characterised by a high mean velocity dispersion of $134$ km/s. The disk-shaped structure is surrounded by an extended array of filaments spread out to $r\sim 50$ kpc that are 10 times fainter in flux, remarkably quiescent and has a uniform mean velocity dispersion of $44$ km/s. This stability is puzzling given that the cluster core exhibits several energetic phenomena. Based on these results, we argue that there are two mechanisms to 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 spread throughout the core. |
| title | High-Spectral Resolution Observations of the Optical Filamentary Nebula in NGC 1275 |
| topic | Astrophysics of Galaxies |
| url | https://arxiv.org/abs/2311.16247 |