Cover Image

Zooming in on the circumgalactic medium with GIBLE: the topology and draping of magnetic fields around cold clouds : letter to the editor

We used a cosmological zoom-in simulation of a Milky Way-like galaxy to study and quantify the topology of magnetic field lines around cold gas clouds in the circumgalactic medium (CGM). This simulation is a new addition to Project GIBLE, a suite of cosmological magnetohydrodynamic simulations of ga...

Full description

Saved in:
Bibliographic Details
Main Authors: Ramesh, Rahul (Author) , Nelson, Dylan (Author) , Fielding, Drummond (Author) , Brüggen, Marcus (Author)
Format: Article (Journal) Editorial
Language:English
Published: April 2024
In: Astronomy and astrophysics
Year: 2024, Volume: 684, Pages: 1-6
ISSN:1432-0746
DOI:10.1051/0004-6361/202348786
Online Access:Verlag, kostenfrei, Volltext: https://doi.org/10.1051/0004-6361/202348786
Verlag, kostenfrei, Volltext: https://www.aanda.org/articles/aa/abs/2024/04/aa48786-23/aa48786-23.html
Get full text
Author Notes:Rahul Ramesh, Dylan Nelson, Drummond Fielding, and Marcus Brüggen
Description
Summary:We used a cosmological zoom-in simulation of a Milky Way-like galaxy to study and quantify the topology of magnetic field lines around cold gas clouds in the circumgalactic medium (CGM). This simulation is a new addition to Project GIBLE, a suite of cosmological magnetohydrodynamic simulations of galaxy formation with preferential super-Lagrangian refinement in the CGM, reaching an unprecedented CGM gas mass resolution of ∼225 M⊙. To maximize statistics and resolution, we focused on a sample of ∼200 clouds with masses of ∼106 M⊙. The topology of magnetic field lines around clouds is diverse, from threading to draping, and there is large variation in the magnetic curvature (κ) within cloud-background interfaces. We typically find little variation of κ between upstream and downstream cloud faces, implying that strongly draped configurations are rare. In addition, κ correlates strongly with multiple properties of the interface and the ambient background, including cloud overdensity and relative velocity, suggesting that cloud properties impact the topology of interface magnetic fields.
Item Description:Gesehen am 23.10.2024
Physical Description:Online Resource
ISSN:1432-0746
DOI:10.1051/0004-6361/202348786

Similar Items