Highly super-Chandrasekhar white dwarfs in an extensive GRMHD framework

TL;DR

This paper uses full-scale GRMHD simulations to demonstrate the existence of stable, highly magnetized white dwarfs exceeding 3 solar masses, potentially explaining over-luminous type Ia supernovae.

Contribution

It provides the first comprehensive GRMHD analysis confirming stable super-Chandrasekhar white dwarfs with various magnetic field configurations.

Findings

Stable, highly magnetized white dwarfs exceeding 3 solar masses confirmed.

Different magnetic field configurations explored, including poloidal, toroidal, and mixed.

Super-Chandrasekhar WDs could be progenitors of over-luminous type Ia supernovae.

Abstract

Our consistent effort to unravel the mystery of super-Chandrasekhar white dwarfs (WDs), by exploiting the potential of magnetic fields, has brought this topic considerable attention. This is also evident from the recent surge in the corresponding literature. In the present work, by means of full-scale general relativistic magnetohydrodynamic (GRMHD) numerical analysis, we confirm the existence of stable, highly magnetized, significantly super-Chandrasekhar WDs having mass exceeding 3 solar mass. We have explored various possible field configurations, namely, poloidal, toroidal and mixed, by self-consistently incorporating the departure from spherical symmetry induced by a strong magnetic field. Such super-Chandrasekhar WDs can be ideal progenitors of peculiar, over-luminous type Ia supernovae.