J 2024

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

VIGNERON, Benjamin, Julie HLAVACEK-LARRONDO, Carter Lee RHEA, Marie-Lou GENDRON-MARSOLAIS, Jeremy LIM et. al.

Basic information

Original name

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

Authors

VIGNERON, Benjamin, Julie HLAVACEK-LARRONDO, Carter Lee RHEA, Marie-Lou GENDRON-MARSOLAIS, Jeremy LIM, Jake REINHEIMER, Yuan LI, Laurent DRISSEN, Greg L. BRYAN, Megan DONAHUE, Alastair EDGE, Andrew FABIAN, Stephen HAMER, Martin THOMAS, Michael MCDONALD, Brian MCNAMARA, Annabelle RICHARD-LAFFERRIERE, Laurie ROUSSEAU-NEPTON, G Mark VOIT, Tracy WEBB and Norbert WERNER (703 Slovakia, belonging to the institution)

Edition

Astrophysical Journal, IOP Publishing Ltd, 2024, 0004-637X

Other information

Language

English

Type of outcome

Článek v odborném periodiku

Field of Study

10308 Astronomy

Country of publisher

United Kingdom of Great Britain and Northern Ireland

Confidentiality degree

není předmětem státního či obchodního tajemství

References:

Impact factor

Impact factor: 4.900 in 2022

Organization unit

Faculty of Science

UT WoS

001159801700001

Keywords in English

AGN host galaxies; Active galaxies; Brightest cluster galaxies; Filamentary nebulae; Perseus Cluster

Tags

Tags

International impact, Reviewed
Změněno: 28/2/2024 10:22, Mgr. Marie Šípková, DiS.

Abstract

V originále

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.

Links

GX21-13491X, research and development project
Name: Zkoumání žhavého vesmíru a porozumění kosmické zpětné vazbě (Acronym: EHU)
Investor: Czech Science Foundation