Post maximum light and late time optical imaging polarimetry of type I superluminous supernova 2020znr

Poidevin, F.; Omand, C. M. B.; Pérez-Fournon, I.; Clavero, R.; Shirley, R.; Marques-Chaves, R.; Jimenez Angel, C.; Geier, S.

doi:10.1093/mnras/stac425

Post maximum light and late time optical imaging polarimetry of type I superluminous supernova 2020znr

Journal Article · Wed Feb 16 23:00:00 EST 2022 · Monthly Notices of the Royal Astronomical Society

DOI:https://doi.org/10.1093/mnras/stac425· OSTI ID:1854280

; Omand, C. M. B.; Pérez-Fournon, I.; Clavero, R.; Shirley, R.; Marques-Chaves, R.; Jimenez Angel, C.; Geier, S.

ABSTRACT

Optical imaging polarimetry was conducted on the hydrogen poor superluminous supernova 2020znr during three phases after maximum light (≈ +34 d, +288 d, and +289 d). After instrumental and interstellar polarization correction, all measurements are consistent with null-polarization detection. Modelling the light curve with a magnetar spin-down model shows that SN2020znr has similar magnetar and ejecta parameters to other SLSNe. A comparison of the best-fitting values discussed in the literature on SN 2017egm and SN 2015bn, two hydrogen poor SLSNe showing an increase of polarization after maximum light, suggests that SN 2020znr has higher mass ejecta that may prevent access to the geometry of the inner ejecta with optical polarimetry. The combined information provided by spectroscopy and light-curve analysis of type I SLSNe may be an interesting avenue to categorize the polarization properties of this class of transients. This approach would require to expand the sample of SLSNe polarimetry data currently available with early and late time epochs new measurements.

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Sponsoring Organization:: USDOE

OSTI ID:: 1854280

Alternate ID(s):: OSTI ID: 1982676

Journal Information:: Monthly Notices of the Royal Astronomical Society, Journal Name: Monthly Notices of the Royal Astronomical Society Journal Issue: 4 Vol. 511; ISSN 0035-8711

Publisher:: Oxford University PressCopyright Statement

Country of Publication:: United Kingdom

Language:: English

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