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Title: Very Deep inside the SN 1987A Core Ejecta: Molecular Structures Seen in 3D

Abstract

Most massive stars end their lives in core-collapse supernova explosions and enrich the interstellar medium with explosively nucleosynthesized elements. Following core collapse, the explosion is subject to instabilities as the shock propagates outward through the progenitor star. Observations of the composition and structure of the innermost regions of a core-collapse supernova provide a direct probe of the instabilities and nucleosynthetic products. SN 1987A in the Large Magellanic Cloud is one of very few supernovae for which the inner ejecta can be spatially resolved but are not yet strongly affected by interaction with the surroundings. Our observations of SN 1987A with the Atacama Large Millimeter/submillimeter Array are of the highest resolution to date and reveal the detailed morphology of cold molecular gas in the innermost regions of the remnant. The 3D distributions of carbon and silicon monoxide (CO and SiO) emission differ, but both have a central deficit, or torus-like distribution, possibly a result of radioactive heating during the first weeks (“nickel heating”). The size scales of the clumpy distribution are compared quantitatively to models, demonstrating how progenitor and explosion physics can be constrained.

Authors:
;  [1]; ;  [2]; ;  [3]; ;  [4];  [5];  [6]; ; ;  [7];  [8];  [9];  [10];  [11];  [12];  [13];  [14] more »; « less
  1. Departamento de Astronomía y Astrofísica, Universidad de Valencia, C/Dr. Moliner 50, E-46100 Burjassot (Spain)
  2. Department of Astronomy, University of Virginia, P.O. Box 400325, Charlottesville, VA 22904 (United States)
  3. Max-Planck-Institut für Astrophysik, Karl-Schwarzschild-Straße 1, D-85748 Garching (Germany)
  4. Department of Astronomy, The Oskar Klein Centre, Stockholm University, Alba Nova University Centre, SE-106 91 Stockholm (Sweden)
  5. ESO, Karl-Schwarzschild-Straße 2, D-85748 Garching (Germany)
  6. Department of Astronomy and Astrophysics, The Pennsylvania State University, University Park, PA 16802 (United States)
  7. School of Physics and Astronomy, Cardiff University, Queens Buildings, The Parade, Cardiff CF24 3AA (United Kingdom)
  8. Dunlap Institute for Astronomy and Astrophysics, University of Toronto, Toronto, ON M5S 3H4 (Canada)
  9. Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138 (United States)
  10. KTH, Department of Physics, and the Oskar Klein Centre, AlbaNova, SE-106 91 Stockholm (Sweden)
  11. Department of Astronomy, University of California, Berkeley, CA 94720-3411 (United States)
  12. Department of Physics, The University of Hong Kong, Pokfulam Road, Hong Kong (China)
  13. Department of Physics, University of Texas at Arlington, 108 Science Hall, Box 19059, Arlington, TX 76019 (United States)
  14. Department of Physics, University of Oxford, Oxford OX1 3RH (United Kingdom)
Publication Date:
OSTI Identifier:
22654450
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astrophysical Journal Letters; Journal Volume: 842; Journal Issue: 2; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; CARBON; CARBON MONOXIDE; DISTRIBUTION; EMISSION; EXPLOSIONS; HEATING; HYDRODYNAMICS; INSTABILITY; INTERACTIONS; MAGELLANIC CLOUDS; MOLECULAR STRUCTURE; NICKEL; NUCLEOSYNTHESIS; RESOLUTION; SILICON; SILICON OXIDES; SUPERNOVA REMNANTS; SUPERNOVAE

Citation Formats

Abellán, F. J., Marcaide, J. M., Indebetouw, R., Chevalier, R., Gabler, M., Janka, H.-Th., Fransson, C., Lundqvist, P., Spyromilio, J., Burrows, D. N., Cigan, P., Gomez, H. L., Matsuura, M., Gaensler, B. M., Kirshner, R., Larsson, J., McCray, R., Ng, C.-Y., Park, S., Roche, P., E-mail: francisco.abellan@uv.es, and and others. Very Deep inside the SN 1987A Core Ejecta: Molecular Structures Seen in 3D. United States: N. p., 2017. Web. doi:10.3847/2041-8213/AA784C.
Abellán, F. J., Marcaide, J. M., Indebetouw, R., Chevalier, R., Gabler, M., Janka, H.-Th., Fransson, C., Lundqvist, P., Spyromilio, J., Burrows, D. N., Cigan, P., Gomez, H. L., Matsuura, M., Gaensler, B. M., Kirshner, R., Larsson, J., McCray, R., Ng, C.-Y., Park, S., Roche, P., E-mail: francisco.abellan@uv.es, & and others. Very Deep inside the SN 1987A Core Ejecta: Molecular Structures Seen in 3D. United States. doi:10.3847/2041-8213/AA784C.
Abellán, F. J., Marcaide, J. M., Indebetouw, R., Chevalier, R., Gabler, M., Janka, H.-Th., Fransson, C., Lundqvist, P., Spyromilio, J., Burrows, D. N., Cigan, P., Gomez, H. L., Matsuura, M., Gaensler, B. M., Kirshner, R., Larsson, J., McCray, R., Ng, C.-Y., Park, S., Roche, P., E-mail: francisco.abellan@uv.es, and and others. Tue . "Very Deep inside the SN 1987A Core Ejecta: Molecular Structures Seen in 3D". United States. doi:10.3847/2041-8213/AA784C.
@article{osti_22654450,
title = {Very Deep inside the SN 1987A Core Ejecta: Molecular Structures Seen in 3D},
author = {Abellán, F. J. and Marcaide, J. M. and Indebetouw, R. and Chevalier, R. and Gabler, M. and Janka, H.-Th. and Fransson, C. and Lundqvist, P. and Spyromilio, J. and Burrows, D. N. and Cigan, P. and Gomez, H. L. and Matsuura, M. and Gaensler, B. M. and Kirshner, R. and Larsson, J. and McCray, R. and Ng, C.-Y. and Park, S. and Roche, P., E-mail: francisco.abellan@uv.es and and others},
abstractNote = {Most massive stars end their lives in core-collapse supernova explosions and enrich the interstellar medium with explosively nucleosynthesized elements. Following core collapse, the explosion is subject to instabilities as the shock propagates outward through the progenitor star. Observations of the composition and structure of the innermost regions of a core-collapse supernova provide a direct probe of the instabilities and nucleosynthetic products. SN 1987A in the Large Magellanic Cloud is one of very few supernovae for which the inner ejecta can be spatially resolved but are not yet strongly affected by interaction with the surroundings. Our observations of SN 1987A with the Atacama Large Millimeter/submillimeter Array are of the highest resolution to date and reveal the detailed morphology of cold molecular gas in the innermost regions of the remnant. The 3D distributions of carbon and silicon monoxide (CO and SiO) emission differ, but both have a central deficit, or torus-like distribution, possibly a result of radioactive heating during the first weeks (“nickel heating”). The size scales of the clumpy distribution are compared quantitatively to models, demonstrating how progenitor and explosion physics can be constrained.},
doi = {10.3847/2041-8213/AA784C},
journal = {Astrophysical Journal Letters},
number = 2,
volume = 842,
place = {United States},
year = {Tue Jun 20 00:00:00 EDT 2017},
month = {Tue Jun 20 00:00:00 EDT 2017}
}