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

Poidevin, F. (author)

Omand, Conor M. B. (author): Stockholms universitet,Institutionen för astronomi,Oskar Klein-centrum för kosmopartikelfysik (OKC)

Pérez-Fournon, I. (author)

Clavero, R. (author)

Shirley, R. (author)

Marques-Chaves, R. (author)

Jimenez Angel, C. (author)

Geier, S. (author)

(creator_code:org_t)

2022-02-17
2022
English.
In: Monthly notices of the Royal Astronomical Society. - : Oxford University Press (OUP). - 0035-8711 .- 1365-2966. ; 511:4, s. 5948-5963

Related links:: http://arxiv.org/pdf...; show more...; https://urn.kb.se/re...; https://doi.org/10.1...; show less...

Abstract Subject headings

Optical imaging polarimetry was conducted on the hydrogen poor superluminous supernova 2020znr during three phases after maximum light (approximate to +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.

By the author/editor: Poidevin, F.; Omand, Conor M. ...; Pérez-Fournon, I ...; Clavero, R.; Shirley, R.; Marques-Chaves, ...; show more...; Jimenez Angel, C ...; Geier, S.; show less...

About the subject

NATURAL SCIENCES: NATURAL SCIENCES; and Physical Science ...; and Astronomy Astrop ...

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