eprintid: 35141
rev_number: 16
eprint_status: archive
userid: 8299
dir: disk0/00/03/51/41
datestamp: 2024-07-26 07:33:14
lastmod: 2024-08-06 12:03:29
status_changed: 2024-07-26 07:33:14
type: doctoralThesis
metadata_visibility: show
creators_name: Leidi, Giovanni
title: Simulating magnetohydrodynamic phenomena in the interior of stars
subjects: ddc-530
divisions: i-130001
adv_faculty: af-13
abstract: This thesis presents multidimensional simulations of magnetohydrodynamic phenomena occurring in the interior of stars. Understanding these phenomena is essential for improving current theories of stellar evolution. The highly subsonic flow regimes found in the regions deep inside stars pose severe challenges to conventional methods of computational magnetohydrodynamics (MHD). Therefore, the first part of this thesis focuses on the development of a suitable numerical solver optimized for magnetized, low-Mach-number stellar flows. The proposed MHD solver is implemented in the Seven-League Hydro (SLH) code and then used to perform unprecedented simulations of turbulent dynamo action in an oxygen-burning shell of a massive star. It is demonstrated that strong, dynamically generated magnetic fields have a significant impact on the evolution of the convective shell and potentially influence the explosion mechanism of core-collapse supernovae. The new MHD capabilities of SLH pave the way for the next generation of stellar models and will aid in the study of various stellar MHD processes in flow regimes that were previously inaccessible.
date: 2024
id_scheme: DOI
id_number: 10.11588/heidok.00035141
ppn_swb: 1897925492
own_urn: urn:nbn:de:bsz:16-heidok-351410
date_accepted: 2024-07-15
advisor: HASH(0x559e37d4af10)
language: eng
bibsort: LEIDIGIOVASIMULATING
full_text_status: public
place_of_pub: Heidelberg
citation:   Leidi, Giovanni  (2024) Simulating magnetohydrodynamic phenomena in the interior of stars.  [Dissertation]     
document_url: https://archiv.ub.uni-heidelberg.de/volltextserver/35141/1/PhD_thesis_Leidi.pdf