Physics of Thermonuclear Explosions: Magnetic Field Effects on Deflagration Fronts and Observable Consequences

Abstract

We present a study of the influence of magnetic field strength and morphology in Type Ia Supernovae and their late-time light curves and spectra. In order to both capture self-consistent magnetic field topologies as well evolve our models to late times, a two stage approach is taken. We study the early deflagration phase (1s) using a variety of magnetic field strengths, and find that the topology of the field is set by the burning, independent of the initial strength. We study late time (~1000 days) light curves and spectra with a variety of magnetic field topologies, and infer magnetic field strengths from observed supernovae. Lower limits are found to be 106G. This is determined by the escape, or lack thereof, of positrons that are tied to the magnetic field. The first stage employs 3d MHD and a local burning approximation, and uses the code Enzo. The second stage employs a hybrid approach, with 3D radiation and positron transport, and spherical hydrodynamics. The second stage uses the code HYDRA. In our models, magnetic field amplification remains small during the early deflagration phase. Late-time spectra bear the imprint of both magnetic field strength and morphology. Implications for alternative explosion scenarios are discussed.

Accepted for publication in ApJ

References in corpus (18)

• The NumPy array: a structure for efficient numerical computation
• Double-detonation sub-Chandrasekhar supernovae: synthetic observables for minimum helium shell mass models
• Binary Star Origin of High Field Magnetic White Dwarfs
• Evidence for Two Distinct Populations of Type Ia Supernovae
• The Initiation and Propagation of Helium Detonations in White Dwarf Envelopes
• A Unified Mechanism for Unconfined Deflagration-to-Detonation Transition in Terrestrial Chemical Systems and Type Ia Supernovae
• Double Detonations with Thin, Modestly Enriched Helium Layers Can Make Normal Type Ia Supernovae
• Comparative Direct Analysis of Type Ia Supernova Spectra. V. Insights from A Larger Sample and Quantitative Subclassification
• Light and color curve properties of type Ia supernovae: Theory vs. Observations
• Asymmetric Explosion of Type Ia Supernovae as Seen from Near Infrared Observations
• The Chemical Distribution in a Subluminous Type Ia Supernova: HST Images of the SN 1885 Remnant
• Thermonuclear explosion of a massive hybrid HeCO white-dwarf triggered by a He-detonation on a companion
• A Simple and Accurate Riemann Solver for Isothermal MHD
• New Close Binary Systems from the SDSS-I (Data Release Five) and the Search for Magnetic White Dwarfs in Cataclysmic Variable Progenitor Systems
• Thermonuclear Supernovae: Probing Magnetic Fields by Late-Time IR Line Profiles
• Mid-IR Spectra of Type Ia SN 2014J in M82 Spanning the First Four Months
• Late-time near-infrared observations of SN 2005df
• Very late photometry of SN 2011fe

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