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Massive, highly magnetized white dwarfs with fields up to $10^9$ G have been observed and theoretically used for the description of a variety of astrophysical phenomena. Ultramagnetized white dwarfs with uniform interior fields up to…

Solar and Stellar Astrophysics · Physics 2014-09-29 J. G. Coelho , R. M. Marinho , M. Malheiro , R. Negreiros , D. L. Cáceres , J. A. Rueda , R. Ruffini

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…

Solar and Stellar Astrophysics · Physics 2016-03-02 Upasana Das , Banibrata Mukhopadhyay

In this work we compute models for relativistic white dwarfs in the presence of strong magnetic fields. These models possibly contribute to super-luminous SNIa. With an assumed axi-symmetric and poloidal magnetic field, we study the…

Solar and Stellar Astrophysics · Physics 2015-10-21 Bruno Franzon , Stefan Schramm

We clarify important physics issues related to the recently established new mass limit for magnetized white dwarfs which is significantly super-Chandrasekhar. The issues include, justification of high magnetic field and the corresponding…

Solar and Stellar Astrophysics · Physics 2014-06-05 Upasana Das , Banibrata Mukhopadhyay

We revisit in this work the problem of the maximum masses of magnetized White Dwarfs (WD). The impact of a strong magnetic field onto the structure equations is addressed. The pressures become anisotropic due to the presence of the magnetic…

High Energy Astrophysical Phenomena · Physics 2015-10-14 D. Manreza Paret , A. Perez Martinez , J. E. Horvath

We compute static equilibria of white dwarf stars containing strong poloidal magnetic field, and present the modification of white dwarf mass-radius relation caused by the magnetic field. We find that a maximum white dwarf mass of about…

Solar and Stellar Astrophysics · Physics 2014-11-11 Prasanta Bera , Dipankar Bhattacharya

We develop a detailed and self-consistent numerical model for extremely-magnetised white dwarfs, which have been proposed as progenitors of overluminous Type Ia supernovae. This model can describe fully-consistent equilibria of magnetic…

Solar and Stellar Astrophysics · Physics 2018-04-18 D. Chatterjee , A. F. Fantina , N. Chamel , J. Novak , M. Oertel

It has been recently proposed that very massive white dwarfs endowed with strongly quantizing magnetic fields might be the progenitors of overluminous type Ia supernovae like SN 2006gz and SN 2009dc. In this work, we show that the onset of…

Solar and Stellar Astrophysics · Physics 2013-10-15 N. Chamel , A. F. Fantina , P. J. Davis

The topic of magnetized super-Chandrasekhar white dwarfs is in the limelight, particularly in the last few years, since our proposal of their existence. By full-scale general relativistic magnetohydrodynamic (GRMHD) numerical analysis, we…

Solar and Stellar Astrophysics · Physics 2015-05-12 Upasana Das , Banibrata Mukhopadhyay

We consider a relativistic, degenerate, electron gas under the influence of a strong magnetic field, which describes magnetized white dwarfs. Landau quantization changes the density of states available to the electrons, thus modifying the…

High Energy Astrophysical Phenomena · Physics 2012-11-20 Upasana Das , Banibrata Mukhopadhyay

We study the strongly magnetized white dwarf configurations in a self-consistent manner as a progenitor of the over-luminous type-Ia supernovae. We compute static equilibria of white dwarf stars containing a strong magnetic field and…

Solar and Stellar Astrophysics · Physics 2017-10-25 Prasanta Bera , Dipankar Bhattacharya

Is the Chandrasekhar mass limit for white dwarfs (WDs) set in stone? Not anymore -- recent observations of over-luminous, peculiar type Ia supernovae can be explained if significantly super-Chandrasekhar WDs exist as their progenitors, thus…

High Energy Astrophysical Phenomena · Physics 2013-09-19 Upasana Das , Banibrata Mukhopadhyay

Type Ia supernovae, sparked off by exploding white dwarfs of mass close to Chandrasekhar limit, play the key role to understand the expansion rate of universe. However, recent observations of several peculiar type Ia supernovae argue for…

Solar and Stellar Astrophysics · Physics 2013-02-19 Upasana Das , Banibrata Mukhopadhyay

We consider a relativistic, degenerate, electron gas under the influence of a strong magnetic field, which describes magnetized white dwarfs. Landau quantization changes the density of states available to the electrons, thus modifying the…

Solar and Stellar Astrophysics · Physics 2013-04-12 Upasana Das , Banibrata Mukhopadhyay

The discovery of the existence of an upper bound on the mass of a white dwarf star is considered as one of the finest of twentieth century astrophysics. On approaching this limiting mass of $1.4M_\odot$, known as the Chandrasekhar…

General Relativity and Quantum Cosmology · Physics 2019-08-30 Sayan K Pal , Partha Nandi

In the presence of a strong magnetic field a stellar equilibrium configuration, aided by the Lorentz force, can support a larger mass than a non-magnetic one. This has been considered a possible explanation of the super-Chandrasekhar mass…

Solar and Stellar Astrophysics · Physics 2017-09-29 Prasanta Bera , Dipankar Bhattacharya

Over the last few decades, there has been considerable interest in the violation of the sacred "Chandrasekhar" mass limit of white dwarfs (WDs). Peculiar over-luminous type Ia supernovae (such as SNLS-03D3bb) lend observational support to…

Solar and Stellar Astrophysics · Physics 2025-09-09 Zenia Zuraiq , Achal Kumar , Alexander J. Hackett , Surendra Bhattarai , Christopher A. Tout , Banibrata Mukhopadhyay

Recently, some over-luminous Ia supernovaes are found, suggesting that their progenitors are white dwarfs more massive than the Chandrasekhar limit, which perhaps result from ultra-strong magnetic field inside the white dwarfs. We present…

High Energy Astrophysical Phenomena · Physics 2015-05-06 Qi-Xiang Zou , Xin-He Meng

Since 2012, we have initiated a new idea showing that the mass of highly magnetized or modified Einstein's gravity induced white dwarfs could be significantly super-Chandrasekhar with a different mass-limit. This discovery has several…

We consider a relativistic, degenerate electron gas at zero-temperature under the influence of a strong, uniform, static magnetic field, neglecting any form of interactions. Since the density of states for the electrons changes due to the…

High Energy Astrophysical Phenomena · Physics 2012-08-08 Upasana Das , Banibrata Mukhopadhyay
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