A POSSIBLE EVOLUTIONARY SCENARIO OF HIGHLY MAGNETIZED SUPER-CHANDRASEKHAR WHITE DWARFS: PROGENITORS OF PECULIAR TYPE Ia SUPERNOVAE

Das, Upasana; Mukhopadhyay, Banibrata

doi:10.1088/2041-8205/767/1/L14

Title: A POSSIBLE EVOLUTIONARY SCENARIO OF HIGHLY MAGNETIZED SUPER-CHANDRASEKHAR WHITE DWARFS: PROGENITORS OF PECULIAR TYPE Ia SUPERNOVAE

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Abstract

Several recently discovered peculiar Type Ia supernovae seem to demand an altogether new formation theory that might help explain the puzzling dissimilarities between them and the standard Type Ia supernovae. The most striking aspect of the observational analysis is the necessity of invoking super-Chandrasekhar white dwarfs having masses {approx}2.1-2.8 M{sub Sun }, M{sub Sun} being the mass of Sun, as their most probable progenitors. Strongly magnetized white dwarfs having super-Chandrasekhar masses have already been established as potential candidates for the progenitors of peculiar Type Ia supernovae. Owing to the Landau quantization of the underlying electron degenerate gas, theoretical results yielded the observationally inferred mass range. Here, we sketch a possible evolutionary scenario by which super-Chandrasekhar white dwarfs could be formed by accretion on to a commonly observed magnetized white dwarf, invoking the phenomenon of flux freezing. This opens multiple possible evolution scenarios ending in supernova explosions of super-Chandrasekhar white dwarfs having masses within the range stated above. We point out that our proposal has observational support, such as the recent discovery of a large number of magnetized white dwarfs by the Sloan Digital Sky Survey.

Authors:

Das, Upasana; Mukhopadhyay, Banibrata ^[1]

Department of Physics, Indian Institute of Science, Bangalore 560012 (India)

Publication Date:: Wed Apr 10 00:00:00 EDT 2013

OSTI Identifier:: 22130747

Resource Type:: Journal Article

Journal Name:: Astrophysical Journal Letters

Additional Journal Information:: Journal Volume: 767; Journal Issue: 1; Other Information: Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 2041-8205

Country of Publication:: United States

Language:: English

Subject:: 79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ACCRETION DISKS; ELECTRONS; EQUATIONS OF STATE; EVOLUTION; EXPLOSIONS; MAGNETIC FIELDS; MAGNETIZATION; MASS; NOVAE; QUANTIZATION; SUN; SUPERNOVAE; WHITE DWARF STARS

Citation Formats


                    Das, Upasana, Mukhopadhyay, Banibrata, and Rao, A. R., E-mail: upasana@physics.iisc.ernet.in, E-mail: bm@physics.iisc.ernet.in, E-mail: arrao@tifr.res.in. A POSSIBLE EVOLUTIONARY SCENARIO OF HIGHLY MAGNETIZED SUPER-CHANDRASEKHAR WHITE DWARFS: PROGENITORS OF PECULIAR TYPE Ia SUPERNOVAE.  United States: N. p., 2013. 
        Web.  doi:10.1088/2041-8205/767/1/L14.

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                    Das, Upasana, Mukhopadhyay, Banibrata, & Rao, A. R., E-mail: upasana@physics.iisc.ernet.in, E-mail: bm@physics.iisc.ernet.in, E-mail: arrao@tifr.res.in. A POSSIBLE EVOLUTIONARY SCENARIO OF HIGHLY MAGNETIZED SUPER-CHANDRASEKHAR WHITE DWARFS: PROGENITORS OF PECULIAR TYPE Ia SUPERNOVAE.  United States.  https://doi.org/10.1088/2041-8205/767/1/L14

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                    Das, Upasana, Mukhopadhyay, Banibrata, and Rao, A. R., E-mail: upasana@physics.iisc.ernet.in, E-mail: bm@physics.iisc.ernet.in, E-mail: arrao@tifr.res.in. 2013.  
        "A POSSIBLE EVOLUTIONARY SCENARIO OF HIGHLY MAGNETIZED SUPER-CHANDRASEKHAR WHITE DWARFS: PROGENITORS OF PECULIAR TYPE Ia SUPERNOVAE".  United States.  https://doi.org/10.1088/2041-8205/767/1/L14.

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@article{osti_22130747,

  title        = {A POSSIBLE EVOLUTIONARY SCENARIO OF HIGHLY MAGNETIZED SUPER-CHANDRASEKHAR WHITE DWARFS: PROGENITORS OF PECULIAR TYPE Ia SUPERNOVAE},

  author       = {Das, Upasana and Mukhopadhyay, Banibrata and Rao, A. R., E-mail: upasana@physics.iisc.ernet.in, E-mail: bm@physics.iisc.ernet.in, E-mail: arrao@tifr.res.in},

  abstractNote = {Several recently discovered peculiar Type Ia supernovae seem to demand an altogether new formation theory that might help explain the puzzling dissimilarities between them and the standard Type Ia supernovae. The most striking aspect of the observational analysis is the necessity of invoking super-Chandrasekhar white dwarfs having masses {approx}2.1-2.8 M{sub Sun }, M{sub Sun} being the mass of Sun, as their most probable progenitors. Strongly magnetized white dwarfs having super-Chandrasekhar masses have already been established as potential candidates for the progenitors of peculiar Type Ia supernovae. Owing to the Landau quantization of the underlying electron degenerate gas, theoretical results yielded the observationally inferred mass range. Here, we sketch a possible evolutionary scenario by which super-Chandrasekhar white dwarfs could be formed by accretion on to a commonly observed magnetized white dwarf, invoking the phenomenon of flux freezing. This opens multiple possible evolution scenarios ending in supernova explosions of super-Chandrasekhar white dwarfs having masses within the range stated above. We point out that our proposal has observational support, such as the recent discovery of a large number of magnetized white dwarfs by the Sloan Digital Sky Survey.},

  doi          = {10.1088/2041-8205/767/1/L14},

  url          = {https://www.osti.gov/biblio/22130747},
  journal      = {Astrophysical Journal Letters},

  issn         = {2041-8205},

  number       = 1,

  volume       = 767,

  place        = {United States},

  year         = {Wed Apr 10 00:00:00 EDT 2013},

  month        = {Wed Apr 10 00:00:00 EDT 2013}

}

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