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

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F24%3A00139370" target="_blank" >RIV/00216224:14310/24:00139370 - isvavai.cz</a>

Výsledek na webu

<a href="https://iopscience.iop.org/article/10.3847/1538-4357/ad0fd8" target="_blank" >https://iopscience.iop.org/article/10.3847/1538-4357/ad0fd8</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3847/1538-4357/ad0fd8" target="_blank" >10.3847/1538-4357/ad0fd8</a>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

We present new high-spectral-resolution observations (R = lambda/Delta lambda = 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 ' x11 ' , encapsulating the entire filamentary structure of ionized gas despite its large size of 80 kpc x 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] lambda 6716, [S ii] lambda 6731, [N ii] lambda 6584, H alpha (6563 angstrom), and [N ii] lambda 6548. These maps reveal the existence of a bright flattened disk-shaped structure in the core extending to r similar to 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 similar to 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.

Název v anglickém jazyce

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

Popis výsledku anglicky

We present new high-spectral-resolution observations (R = lambda/Delta lambda = 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 ' x11 ' , encapsulating the entire filamentary structure of ionized gas despite its large size of 80 kpc x 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] lambda 6716, [S ii] lambda 6731, [N ii] lambda 6584, H alpha (6563 angstrom), and [N ii] lambda 6548. These maps reveal the existence of a bright flattened disk-shaped structure in the core extending to r similar to 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 similar to 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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10308 - Astronomy (including astrophysics,space science)

Projekt

<a href="/cs/project/GX21-13491X" target="_blank" >GX21-13491X: Zkoumání žhavého vesmíru a porozumění kosmické zpětné vazbě</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2024

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Astrophysical Journal

ISSN

0004-637X

e-ISSN

1538-4357

Svazek periodika

962

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

21

Strana od-do

1-21

Kód UT WoS článku

001159801700001

EID výsledku v databázi Scopus

2-s2.0-85184886481