WFRF:(Maund Justyn)
Search: WFRF:(Maund Justyn) > (2020-2023) > Spectropolarimetry ...
- 5 of 7
- Previous record
- Next record
- To hitlist
Spectropolarimetry of the Type Ia SN 2019ein rules out significant global asphericity of the ejecta
- Patra, Kishore C. (author)
- Yang, Yi (author)
- Brink, Thomas G. (author)
- show more...
- Höflich, Peter (author)
- Wang, Lifan (author)
- Filippenko, Alexei V. (author)
- Kasen, Daniel (author)
- Baade, Dietrich (author)
- Foley, Ryan J. (author)
- Maund, Justyn R. (author)
- Zheng, WeiKang (author)
- Hung, Tiara (author)
- Cikota, Aleksandar (author)
- Wheeler, J. Craig (author)
- show less...
- (creator_code:org_t)
- 2021-10-29
- 2021
- English.
- In: Monthly notices of the Royal Astronomical Society. - : Oxford University Press (OUP). - 0035-8711 .- 1365-2966. ; 509:3, s. 4058-4070
- Journal article (peer-reviewed)
Abstract
Subject headings
Close
- Detailed spectropolarimetric studies may hold the key to probing the explosion mechanisms and the progenitor scenarios of Type Ia supernovae (SNe Ia). We present multi-epoch spectropolarimetry and imaging polarimetry of SN 2019ein, an SN Ia showing high expansion velocities at early phases. The spectropolarimetry sequence spans from ∼−11 to +10 d relative to peak brightness in the B band. We find that the level of the continuum polarization of SN 2019ein, after subtracting estimated interstellar polarization, is in the range 0.0–0.3 per cent, typical for SNe Ia. The polarization position angle remains roughly constant before and after the SN light-curve peak, implying that the inner regions share the same axisymmetry as the outer layers. We observe high polarization (∼1 per cent) across both the Si II λ6355 and Ca II near-infrared triplet features. These two lines also display complex polarization modulations. The spectropolarimetric properties of SN 2019ein rule out a significant departure from spherical symmetry of the ejecta for up to a month after the explosion. These observations disfavour merger-induced and double-detonation models for SN 2019ein. The imaging polarimetry shows weak evidence for a modest increase in polarization after ∼20 d since the B-band maximum. If this rise is real and is observed in other SNe Ia at similar phases, we may have seen, for the first time, an aspherical interior similar to what has been previously observed for SNe IIP. Future polarization observations of SNe Ia extending to post-peak epochs will help to examine the inner structure of the explosion.
Subject headings
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
Keyword
- polarization
- techniques: polarimetric
- supernovae: individual: SN2019ein
- white dwarfs
Publication and Content Type
- ref (subject category)
- art (subject category)
Find in a library
- Monthly notices of the Royal Astronomical Society (Search for host publication in LIBRIS)
To the university's database
- 5 of 7
- Previous record
- Next record
- To hitlist
Find more in SwePub
- By the author/editor
- Patra, Kishore C ...
- Yang, Yi
- Brink, Thomas G.
- Höflich, Peter
- Wang, Lifan
- Filippenko, Alex ...
- show more...
- Kasen, Daniel
- Baade, Dietrich
- Foley, Ryan J.
- Maund, Justyn R.
- Zheng, WeiKang
- Hung, Tiara
- Cikota, Aleksand ...
- Wheeler, J. Crai ...
- Bulla, Mattia
- show less...
- About the subject
-
- NATURAL SCIENCES
- NATURAL SCIENCES
- and Physical Science ...
- Articles in the publication
- Monthly notices ...
- By the university
- Stockholm University
Search outside SwePub
- Extend your search to:
- Google Book Search
- Google Scholar
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.
- Copyright © LIBRIS - National Library Systems
- LIBRIS.kb.se
