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  The aspherical explosion of the Type IIP SN 2017gmr

Nagao, T., Cikota, A., Patat, F., Taubenberger, S., Bulla, M., Faran, T., et al. (2019). The aspherical explosion of the Type IIP SN 2017gmr. Monthly Notices of the Royal Astronomical Society: Letters, 489(1), L69-L74. doi:10.1093/mnrasl/slz119.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0005-56F1-A Version Permalink: http://hdl.handle.net/21.11116/0000-0005-56F2-9
Genre: Journal Article

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Nagao, T., Author
Cikota, A., Author
Patat, F., Author
Taubenberger, S.1, Author              
Bulla, M., Author
Faran, T., Author
Sand, D. J., Author
Valenti, S., Author
Andrews, J. E., Author
Reichart, D. E., Author
Affiliations:
1Stellar Astrophysics, MPI for Astrophysics, Max Planck Society, ou_159882              

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 Abstract: Type IIP supernovae (SNe IIP), which represent the most common class of core-collapse (CC) SNe, show a rapid increase in continuum polarization just after entering the tail phase. This feature can be explained by a highly asymmetric helium core, which is exposed when the hydrogen envelope becomes transparent. Here we report the case of an SN IIP (SN 2017gmr) that shows an unusually early rise of the polarization, ≳30 d before the start of the tail phase. This implies that SN 2017gmr is an SN IIP that has very extended asphericity. The asymmetries are not confined to the helium core, but reach out to a significant part of the outer hydrogen envelope, hence clearly indicating a marked intrinsic diversity in the aspherical structure of CC explosions. These observations provide new constraints on the explosion mechanism, where viable models must be able to produce such extended deviations from spherical symmetry, and account for the observed geometrical diversity.

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 Dates: 2019-09-05
 Publication Status: Published online
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 Rev. Type: Peer
 Identifiers: DOI: 10.1093/mnrasl/slz119
Other: LOCALID: 3181596
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Title: Monthly Notices of the Royal Astronomical Society: Letters
  Other : Mon. Not. Roy. Astron. Soc.: Letters
Source Genre: Journal
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Publ. Info: Oxford : OXFORD UNIV PRESS
Pages: - Volume / Issue: 489 (1) Sequence Number: - Start / End Page: L69 - L74 Identifier: ISSN: 0035-8711
CoNE: https://pure.mpg.de/cone/journals/resource/1000000000021470