Mapping the Filamentary Nebula of NGC 1275 with Multiwavelength SITELLE Observations
The filamentary nebula encompassing the central galaxy of the Perseus Cluster, NGC 1275, is a complex structure extending dozens of kiloparsecs from NGC 1275. Decades of previous works have focused on establishing the primary formation and ionization mechanisms in different filaments. These studies...
| Autores: | , , , , , , , , , , , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2025 |
| País: | España |
| Institución: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repositorio: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
| OAI Identifier: | oai:digital.csic.es:10261/387840 |
| Acceso en línea: | http://hdl.handle.net/10261/387840 https://api.elsevier.com/content/abstract/scopus_id/86000766389 |
| Access Level: | acceso abierto |
| Palabra clave: | Galaxies Galactic and extragalactic astronomy Galaxy spectroscopy http://astrothesaurus.org/uat/573 http://astrothesaurus.org/uat/563 |
| Sumario: | The filamentary nebula encompassing the central galaxy of the Perseus Cluster, NGC 1275, is a complex structure extending dozens of kiloparsecs from NGC 1275. Decades of previous works have focused on establishing the primary formation and ionization mechanisms in different filaments. These studies have pointed to a lack of star formation in the majority of the filaments, the importance of magnetic fields and turbulence in several regions, and the role of interactions between the intracluster medium (ICM) and the cool gas in the filaments, as well as the role of interaction between the central radio source, 3C84, and the filaments. In this paper, we present multi-filter observations of the entire filamentary system that cover the optical bandpass, using the SITELLE instrument at the Canada-France-Hawai’i Telescope. Here, we use the data analysis software, LUCI (https://crhea93.github.io/LUCI/index.html), to produce flux maps of the prominent emission lines present in the filters: [O ii]λ3726/3729, [O iii]λ5007, Hβ, [N ii]λ6548, [N ii]λ6583, and Hα. We use these maps to produce Baldwin-Phillips-Terlevich and WHAN diagrams to study the ionization mechanisms at play in each distinct region of the filamentary nebula. First, we confirm the absence of [O iii]λ5007 in the extended filaments, although we detect this line in the central core, revealing a compact region where photoionization by the active galactic nucleus might affect local conditions. Our findings corroborate previous claims that the ionization in the extended filaments could be caused by the cooling ICM via collisional excitation and/or mixing. Moreover, they support the conclusion that magnetic fields play an important role in the formation and continued existence of the filaments. |
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