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

Post maximum light and late time optical imaging polarimetry of type I superluminous supernova 2020znr
Post maximum light and late time optical imaging polarimetry of type I superluminous supernova 2020znr
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.
1365-2966
5948 - 5963
Poidevin, F.
79951b19-bdfb-4754-82f6-26c16258d06b
Omand, C. M. B.
99a9ad27-a926-4280-ba58-8495a536a4c7
Pérez-Fournon, I.
a7d96d1e-5797-4f81-8df6-15f7b47b55fc
Clavero, R.
b1211bd6-e9d0-4afe-ab06-afe0c93aca6a
Shirley, Raphael
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Marques-Chaves, R.
301b325b-a3f0-4799-b19f-7b3f0bded2a5
Jimenez Angel, C.
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Geier, S.
1703a894-f94d-4327-8b28-9e04ffaf98c7
Poidevin, F.
79951b19-bdfb-4754-82f6-26c16258d06b
Omand, C. M. B.
99a9ad27-a926-4280-ba58-8495a536a4c7
Pérez-Fournon, I.
a7d96d1e-5797-4f81-8df6-15f7b47b55fc
Clavero, R.
b1211bd6-e9d0-4afe-ab06-afe0c93aca6a
Shirley, Raphael
fb6bc6f3-f593-4cf5-9f68-a63587ab8135
Marques-Chaves, R.
301b325b-a3f0-4799-b19f-7b3f0bded2a5
Jimenez Angel, C.
6d456b7e-4c43-42e6-9b68-fffb9d04ef2b
Geier, S.
1703a894-f94d-4327-8b28-9e04ffaf98c7

Poidevin, F., Omand, C. M. B., Pérez-Fournon, I., Clavero, R., Shirley, Raphael, Marques-Chaves, R., Jimenez Angel, C. and Geier, S. (2022) Post maximum light and late time optical imaging polarimetry of type I superluminous supernova 2020znr. Monthly Notices of the Royal Astronomical Society, 511 (4), 5948 - 5963.

Record type: Article

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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2201.03887 - Accepted Manuscript
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Accepted/In Press date: 31 January 2022
Published date: 17 February 2022
Additional Information: arXiv:201.03887

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Local EPrints ID: 456774
URI: http://eprints.soton.ac.uk/id/eprint/456774
ISSN: 1365-2966
PURE UUID: 85c6afd8-85e1-4c2a-8df6-46527ec45e09

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Date deposited: 11 May 2022 16:37
Last modified: 16 Mar 2024 17:00

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Contributors

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

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