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Infant-phase redden...
Infant-phase reddening by surface Fe-peak elements in a normal type Ia supernova
- Article/chapterEnglish2022
Publisher, publication year, extent ...
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2022-02-17
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Springer Science and Business Media LLC,2022
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printrdacarrier
Numbers
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LIBRIS-ID:oai:DiVA.org:su-202875
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https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-202875URI
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https://doi.org/10.1038/s41550-022-01603-4DOI
Supplementary language notes
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Language:English
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Summary in:English
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Subject category:ref swepub-contenttype
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Subject category:art swepub-publicationtype
Notes
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Type Ia supernovae are thermonuclear explosions of white dwarf stars. They play a central role in the chemical evolution of the Universe and are an important measure of cosmological distances. However, outstanding questions remain about their origins. Despite extensive efforts to obtain natal information from their earliest signals, observations have thus far failed to identify how the majority of them explode. Here, we present infant-phase detections of SN 2018aoz from a very low brightness of −10.5 AB absolute magnitude, revealing a hitherto unseen plateau in the B band that results in a rapid redward colour evolution between 1.0 and 12.4 hours after the estimated epoch of first light. The missing B-band flux is best explained by line-blanket absorption from Fe-peak elements in the outer 1% of the ejected mass. The observed B − V colour evolution of the supernova also matches the prediction from an over-density of Fe-peak elements in the same outer 1% of the ejected mass, whereas bluer colours are expected from a purely monotonic distribution of Fe-peak elements. The presence of excess nucleosynthetic material in the extreme outer layers of the ejecta points to enhanced surface nuclear burning or extended subsonic mixing processes in some normal type Ia SN explosions.
Subject headings and genre
Added entries (persons, corporate bodies, meetings, titles ...)
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Moon, Dae-Sik
(author)
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Drout, Maria R.
(author)
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Polin, Abigail
(author)
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Sand, David J.
(author)
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González-Gaitán, Santiago
(author)
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Kim, Sang Chul
(author)
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Lee, Youngdae
(author)
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Park, Hong Soo
(author)
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Howell, D. Andrew
(author)
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Nugent, Peter E.
(author)
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Piro, Anthony L.
(author)
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Brown, Peter J.
(author)
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Galbany, Lluís
(author)
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Burke, Jamison
(author)
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Hiramatsu, Daichi
(author)
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Hosseinzadeh, Griffin
(author)
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Valenti, Stefano
(author)
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Afsariardchi, Niloufar
(author)
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Andrews, Jennifer E.
(author)
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Antoniadis, John
(author)
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Arcavi, Iair
(author)
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Beaton, Rachael L.
(author)
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Bostroem, K. Azalee
(author)
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Carlberg, Raymond G.
(author)
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Cenko, S. Bradley
(author)
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Cha, Sang-Mok
(author)
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Dong, Yize
(author)
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Gal-Yam, Avishay
(author)
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Haislip, Joshua
(author)
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Holoien, Thomas W.-S.
(author)
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Johnson, Sean D.
(author)
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Kouprianov, Vladimir
(author)
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Lee, Yongseok
(author)
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Matzner, Christopher D.
(author)
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Morrell, Nidia
(author)
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McCully, Curtis
(author)
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Pignata, Giuliano
(author)
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Reichart, Daniel E.
(author)
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Rich, Jeffrey
(author)
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Ryder, Stuart D.
(author)
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Smith, Nathan
(author)
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Wyatt, Samuel
(author)
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Yang, ShengStockholms universitet,Institutionen för astronomi,Oskar Klein-centrum för kosmopartikelfysik (OKC)(Swepub:su)yash0613
(author)
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Stockholms universitetInstitutionen för astronomi
(creator_code:org_t)
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In:Nature Astronomy: Springer Science and Business Media LLC6:5, s. 568-5762397-3366
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Ni, Yuan Qi
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Moon, Dae-Sik
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Drout, Maria R.
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Polin, Abigail
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Sand, David J.
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González-Gaitán, ...
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Kim, Sang Chul
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Lee, Youngdae
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Park, Hong Soo
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Howell, D. Andre ...
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Nugent, Peter E.
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Piro, Anthony L.
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Brown, Peter J.
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Galbany, Lluís
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Burke, Jamison
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Hiramatsu, Daich ...
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Hosseinzadeh, Gr ...
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Valenti, Stefano
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Afsariardchi, Ni ...
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Andrews, Jennife ...
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Antoniadis, John
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Arcavi, Iair
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Beaton, Rachael ...
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Bostroem, K. Aza ...
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Carlberg, Raymon ...
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Cenko, S. Bradle ...
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Cha, Sang-Mok
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Dong, Yize
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Gal-Yam, Avishay
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Haislip, Joshua
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Holoien, Thomas ...
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Johnson, Sean D.
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Kouprianov, Vlad ...
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Lee, Yongseok
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Matzner, Christo ...
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Morrell, Nidia
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McCully, Curtis
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Pignata, Giulian ...
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Reichart, Daniel ...
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Rich, Jeffrey
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Ryder, Stuart D.
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Smith, Nathan
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Wyatt, Samuel
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Yang, Sheng
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NATURAL SCIENCES
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Nature Astronomy
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Stockholm University