CFHT UM2025 - Presentation Details
Abstract Details
Title: Studying the Highly Multiphase Environment Surrounding NGC 1275 with SITELLE and ESPaDOnS High Spectral Resolution Observations.
Presenter: Benjamin Vigneron
Abstract:
In this presentation, we will discuss new high-spectral resolution (R = 7000) observations of the filamentary nebula surrounding NGC 1275, the central galaxy of the Perseus Cluster. These observations, obtained with SITELLE, provide a wide field of view (11' × 11'), allowing us to capture the full extent of the ionized gas filaments, which span approximately 80 × 50 kpc. We will present updated flux, velocity, and velocity dispersion maps that offer a detailed view of the nebula’s kinematics. These maps reveal a bright, flattened, disk-like structure in the core, extending to ~10 kpc, where chaotic velocity fields dominate. This central structure lies in the wake of X-ray cavities and is characterized by high velocity dispersion. Surrounding it, we identify an extended network of filaments—an order of magnitude fainter in flux—remarkably quiescent, and exhibiting a lower, more uniform velocity dispersion. Building on these results, we will also explore electron densities measurements across the filaments and in the inner structure thanks to emission line ratios. Additionally, we will present new results from the ESPaDOnS instrument of pointings targeting the filaments and revealing multiple emission components thanks to its extremely high spectral resolution (R = 68000).