Buchumschlag

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...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Hauptverfasser: Ramesh, Rahul (VerfasserIn) , Nelson, Dylan (VerfasserIn) , Fielding, Drummond (VerfasserIn) , Brüggen, Marcus (VerfasserIn)
Dokumenttyp: Article (Journal) Editorial
Sprache:Englisch
Veröffentlicht: April 2024
In: Astronomy and astrophysics
Year: 2024, Jahrgang: 684, Pages: 1-6
ISSN:1432-0746
DOI:10.1051/0004-6361/202348786
Online-Zugang: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
Volltext
Verfasserangaben:Rahul Ramesh, Dylan Nelson, Drummond Fielding, and Marcus Brüggen
Beschreibung
Zusammenfassung: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.
Beschreibung:Gesehen am 23.10.2024
Beschreibung:Online Resource
ISSN:1432-0746
DOI:10.1051/0004-6361/202348786

Ähnliche Einträge