TYPE IIb SUPERNOVAE WITH COMPACT AND EXTENDED PROGENITORS

Chevalier, Roger A

doi:10.1088/2041-8205/711/1/L40; COUNTRY OF INPUT: INTERNATIONAL ATOMIC ENERGY AGENCY (IAEA)

Title: TYPE IIb SUPERNOVAE WITH COMPACT AND EXTENDED PROGENITORS

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Abstract

The classic example of a Type IIb supernova is SN 1993J, which had a cool extended progenitor surrounded by a dense wind. There is evidence for another category of Type IIb supernova that has a more compact progenitor with a lower density, probably fast, wind. Distinguishing features of the compact category are weak optical emission from the shock heated envelope at early times, nonexistent or very weak H emission in the late nebular phase, rapidly evolving radio emission, rapid expansion of the radio shell, and expected nonthermal as opposed to thermal X-ray emission. Type IIb supernovae that have one or more of these features include SNe 1996cb, 2001ig, 2003bg, 2008ax, and 2008bo. All of these with sufficient radio data (the last four) show evidence for presupernova wind variability. We estimate a progenitor envelope radius {approx}1 x 10{sup 11} cm for SN 2008ax, a value consistent with a compact Wolf-Rayet progenitor. Supernovae in the SN 1993J extended category include SN 2001gd and probably the Cas A supernova. We suggest that the compact Type IIb events be designated Type cIIb and the extended ones Type eIIb. The H envelope mass dividing these categories is {approx}0.1 M {sub sun}.

Authors:

Chevalier, Roger A ^[1]

Department of Astronomy, University of Virginia, P.O. Box 400325, Charlottesville, VA 22904-4325 (United States)

Publication Date:: Mon Mar 01 00:00:00 EST 2010

OSTI Identifier:: 21308726

Resource Type:: Journal Article

Journal Name:: Astrophysical Journal Letters

Additional Journal Information:: Journal Volume: 711; Journal Issue: 1; Other Information: DOI: 10.1088/2041-8205/711/1/L40; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 2041-8205

Country of Publication:: United States

Language:: English

Subject:: 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; EMISSION; EXPANSION; MASS; SHOCK WAVES; SUPERNOVAE

Citation Formats


                    Chevalier, Roger A, and Soderberg, Alicia M. TYPE IIb SUPERNOVAE WITH COMPACT AND EXTENDED PROGENITORS.  United States: N. p., 2010. 
        Web.  doi:10.1088/2041-8205/711/1/L40; COUNTRY OF INPUT: INTERNATIONAL ATOMIC ENERGY AGENCY (IAEA).

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                    Chevalier, Roger A, & Soderberg, Alicia M. TYPE IIb SUPERNOVAE WITH COMPACT AND EXTENDED PROGENITORS.  United States.  https://doi.org/10.1088/2041-8205/711/1/L40; COUNTRY OF INPUT: INTERNATIONAL ATOMIC ENERGY AGENCY (IAEA)

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                    Chevalier, Roger A, and Soderberg, Alicia M. 2010.  
        "TYPE IIb SUPERNOVAE WITH COMPACT AND EXTENDED PROGENITORS".  United States.  https://doi.org/10.1088/2041-8205/711/1/L40; COUNTRY OF INPUT: INTERNATIONAL ATOMIC ENERGY AGENCY (IAEA).

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@article{osti_21308726,

  title        = {TYPE IIb SUPERNOVAE WITH COMPACT AND EXTENDED PROGENITORS},

  author       = {Chevalier, Roger A and Soderberg, Alicia M.},

  abstractNote = {The classic example of a Type IIb supernova is SN 1993J, which had a cool extended progenitor surrounded by a dense wind. There is evidence for another category of Type IIb supernova that has a more compact progenitor with a lower density, probably fast, wind. Distinguishing features of the compact category are weak optical emission from the shock heated envelope at early times, nonexistent or very weak H emission in the late nebular phase, rapidly evolving radio emission, rapid expansion of the radio shell, and expected nonthermal as opposed to thermal X-ray emission. Type IIb supernovae that have one or more of these features include SNe 1996cb, 2001ig, 2003bg, 2008ax, and 2008bo. All of these with sufficient radio data (the last four) show evidence for presupernova wind variability. We estimate a progenitor envelope radius {approx}1 x 10{sup 11} cm for SN 2008ax, a value consistent with a compact Wolf-Rayet progenitor. Supernovae in the SN 1993J extended category include SN 2001gd and probably the Cas A supernova. We suggest that the compact Type IIb events be designated Type cIIb and the extended ones Type eIIb. The H envelope mass dividing these categories is {approx}0.1 M {sub sun}.},

  doi          = {10.1088/2041-8205/711/1/L40; COUNTRY OF INPUT: INTERNATIONAL ATOMIC ENERGY AGENCY (IAEA)},

  url          = {https://www.osti.gov/biblio/21308726},
  journal      = {Astrophysical Journal Letters},

  issn         = {2041-8205},

  number       = 1,

  volume       = 711,

  place        = {United States},

  year         = {Mon Mar 01 00:00:00 EST 2010},

  month        = {Mon Mar 01 00:00:00 EST 2010}

}

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https://doi.org/10.1088/2041-8205/711/1/L40; COUNTRY OF INPUT: INTERNATIONAL ATOMIC ENERGY AGENCY (IAEA)

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