Sökning: id:"swepub:oai:DiVA.org:su-144586" >
Time-resolved Polar...
Time-resolved Polarimetry of the Superluminous SN 2015bn with the Nordic Optical Telescope
-
Leloudas, Giorgos (författare)
-
Maund, Justyn R. (författare)
-
Gal-Yam, Avishay (författare)
-
visa fler...
-
Pursimo, Tapio (författare)
-
Hsiao, Eric (författare)
-
Malesani, Daniele (författare)
-
Patat, Ferdinando (författare)
-
de Ugarte Postigo, Antonio (författare)
-
- Sollerman, Jesper (författare)
- Stockholms universitet,Institutionen för astronomi,Oskar Klein-centrum för kosmopartikelfysik (OKC)
-
Stritzinger, Maximilian D. (författare)
-
Wheeler, J. Craig (författare)
-
visa färre...
-
(creator_code:org_t)
- 2017-03-02
- 2017
- Engelska.
-
Ingår i: Astrophysical Journal Letters. - : American Astronomical Society. - 2041-8205 .- 2041-8213. ; 837:1
- Relaterad länk:
-
https://backend.orbi...
-
visa fler...
-
https://urn.kb.se/re...
-
https://doi.org/10.3...
-
visa färre...
Abstract
Ämnesord
Stäng
- We present imaging polarimetry of the superluminous supernova SN 2015bn, obtained over nine epochs between -20 and +46 days with the Nordic Optical Telescope. This was a nearby, slowly evolving Type I superluminous supernova that has been studied extensively and for which two epochs of spectropolarimetry are also available. Based on field stars, we determine the interstellar polarization in the Galaxy to be negligible. The polarization of SN. 2015bn shows a statistically significant increase during the last epochs, confirming previous findings. Our well-sampled imaging polarimetry series allows us to determine that this increase (from similar to 0.54% to greater than or similar to 1.10%) coincides in time with rapid changes that took place in the optical spectrum. We conclude that the supernova underwent a phase transition at around +20 days, when the photospheric emission shifted from an outer layer, dominated by natal C and O, to a more aspherical inner core, dominated by freshly nucleosynthesized material. This two-layered model might account for the characteristic appearance and properties of Type I superluminous supernovae.
Ämnesord
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Nyckelord
- supernovae: general
- supernovae: individual (SN 2015bn)
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
Hitta via bibliotek
Till lärosätets databas
- Av författaren/redakt...
-
Leloudas, Giorgo ...
-
Maund, Justyn R.
-
Gal-Yam, Avishay
-
Pursimo, Tapio
-
Hsiao, Eric
-
Malesani, Daniel ...
-
visa fler...
-
Patat, Ferdinand ...
-
de Ugarte Postig ...
-
Sollerman, Jespe ...
-
Stritzinger, Max ...
-
Wheeler, J. Crai ...
-
visa färre...
- Om ämnet
-
- NATURVETENSKAP
-
NATURVETENSKAP
-
och Fysik
-
och Astronomi astrof ...
- Artiklar i publikationen
-
Astrophysical Jo ...
- Av lärosätet
-
Stockholms universitet