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  Probabilistic reconstruction of type Ia supernova SN 2002bo

O’Brien, J. T., Kerzendorf, W. E., Fullard, A., Williamson, M., Pakmor, R., Buchner, J., et al. (2021). Probabilistic reconstruction of type Ia supernova SN 2002bo. The Astrophysical Journal Letters, 916(2): L14. doi:10.3847/2041-8213/ac1173.

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Probabilistic reconstruction of type Ia supernova SN 2002bo.pdf (Any fulltext), 521KB
 
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O’Brien, John T., Author
Kerzendorf, Wolfgang E., Author
Fullard, Andrew, Author
Williamson, Marc, Author
Pakmor, Rüdiger, Author
Buchner, Johannes1, Author              
Hachinger, Stephan, Author
Vogl, Christian, Author
Gillanders, James H., Author
Flörs, Andreas, Author
van der Smagt, Patrick, Author
Affiliations:
1High Energy Astrophysics, MPI for Extraterrestrial Physics, Max Planck Society, ou_159890              

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 Abstract: Manual fits to spectral times series of Type Ia supernovae have provided a method of reconstructing the explosion from a parametric model but due to lack of information about model uncertainties or parameter degeneracies direct comparison between theory and observation is difficult. In order to mitigate this important problem we present a new way to probabilistically reconstruct the outer ejecta of the normal Type Ia supernova SN 2002bo. A single epoch spectrum, taken 10 days before maximum light, is fit by a 13-parameter model describing the elemental composition of the ejecta and the explosion physics (density, temperature, velocity, and explosion epoch). Model evaluation is performed through the application of a novel rapid spectral synthesis technique in which the radiative transfer code, TARDIS, is accelerated by a machine-learning framework. Analysis of the posterior distribution reveals a complex and degenerate parameter space and allows direct comparison to various hydrodynamic models. Our analysis favors detonation over deflagration scenarios and we find that our technique offers a novel way to compare simulation to observation.

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Language(s): eng - English
 Dates: 2021-07-29
 Publication Status: Published online
 Pages: -
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 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.3847/2041-8213/ac1173
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Title: The Astrophysical Journal Letters
  Other : Astrophys. J. Lett.
Source Genre: Journal
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Publ. Info: Chicago, IL : University of Chicago Press for the American Astronomical Society
Pages: - Volume / Issue: 916 (2) Sequence Number: L14 Start / End Page: - Identifier: ISSN: 0004-637X
CoNE: https://pure.mpg.de/cone/journals/resource/954922828215