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 (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.

NATURVETENSKAP Fysik Astronomi, astrofysik och kosmologi hsv//swe
NATURAL SCIENCES Physical Sciences Astronomy, Astrophysics and Cosmology hsv//eng
techniques: polarimetric
supernovae: general
supernovae: individual: 2020znr
2015bn
2017egm
2018hti
LSQ14mo
PTF12dam

Omand, Conor M. B.Stockholms universitet,Institutionen för astronomi,Oskar Klein-centrum för kosmopartikelfysik (OKC)(Swepub:su)coom9840 (författare)
Pérez-Fournon, I. (författare)
Clavero, R. (författare)
Shirley, R. (författare)
Marques-Chaves, R. (författare)
Jimenez Angel, C. (författare)
Geier, S. (författare)
Stockholms universitetInstitutionen för astronomi (creator_code:org_t)

Ingår i:Monthly notices of the Royal Astronomical Society: Oxford University Press (OUP)511:4, s. 5948-59630035-87111365-2966

Om ämnet

Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.