A massive multiphase plume of gas in Abell 2390’s brightest cluster galaxy

Rose, Tom; McNamara, B R; Combes, F; Edge, A C; Russell, H; Salomé, P; Tamhane, P; Fabian, A C; Tremblay, G

doi:10.1093/mnras/stae213

A massive multiphase plume of gas in Abell 2390’s brightest cluster galaxy

Rose, Tom; McNamara, B R; Combes, F; Edge, A C; Russell, H; Salomé, P; Tamhane, P; Fabian, A C; Tremblay, G

Authors

Tom Rose

B R McNamara

F Combes

Professor Alastair Edge alastair.edge@durham.ac.uk
Professor

H Russell

P Salomé

P Tamhane

A C Fabian

G Tremblay

Abstract

We present new ALMA CO(2-1) observations tracing 2.2 × 1010 M. of molecular gas in Abell 2390’s brightest cluster galaxy, where half the gas is located in a one-sided plume extending 15 kpc out from the galaxy centre. This molecular gas has a smooth and positive velocity gradient, and is receding 250 km s−1 faster at its farthest point than at the galaxy centre. To constrain the plume’s origin, we analyse our new observations alongside existing X-ray, optical, and radio data. We consider the possibility that the plume is a jet-driven outflow with lifting aided by jet-inflated X-ray bubbles, is a trail of gas stripped from the main galaxy by ram pressure, or is formed of more recently cooled and infalling gas. The galaxy’s star formation and gas cooling rate suggest the lifespan of its molecular gas may be low compared with the plume’s age – which would favour a recently cooled plume. Molecular gas in close proximity to the active galactic nucleus is also indicated by 250 km s−1 wide CO(2-1) absorption against the radio core, as well as previously detected CO(1-0) and H I absorption. This absorption is optically thick and has a line-of-sight velocity towards the galaxy centre of 200 km s−1. We discuss simple models to explain its origin.

Citation

Rose, T., McNamara, B. R., Combes, F., Edge, A. C., Russell, H., Salomé, P., …Tremblay, G. (2024). A massive multiphase plume of gas in Abell 2390’s brightest cluster galaxy. Monthly Notices of the Royal Astronomical Society, 528(2), 3441-3455. https://doi.org/10.1093/mnras/stae213

Journal Article Type	Article
Acceptance Date	Jan 15, 2023
Online Publication Date	Jan 19, 2024
Publication Date	2024-02
Deposit Date	Mar 19, 2024
Publicly Available Date	Mar 19, 2024
Journal	Monthly Notices of the Royal Astronomical Society
Print ISSN	0035-8711
Electronic ISSN	1365-2966
Publisher	Royal Astronomical Society
Peer Reviewed	Peer Reviewed
Volume	528
Issue	2
Pages	3441-3455
DOI	https://doi.org/10.1093/mnras/stae213
Public URL	https://durham-repository.worktribe.com/output/2332968

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This is an Open Access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited.