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Infant-phase redden...
Infant-phase reddening by surface Fe-peak elements in a normal type Ia supernova
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Ni, Yuan Qi (author)
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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, Sheng (author)
- Stockholms universitet,Institutionen för astronomi,Oskar Klein-centrum för kosmopartikelfysik (OKC)
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(creator_code:org_t)
- 2022-02-17
- 2022
- English.
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In: Nature Astronomy. - : Springer Science and Business Media LLC. - 2397-3366. ; 6:5, s. 568-576
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
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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
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Publication and Content Type
- ref (subject category)
- art (subject category)
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To the university's database
- By the author/editor
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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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show more...
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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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show less...
- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Astronomy Astrop ...
- Articles in the publication
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Nature Astronomy
- By the university
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Stockholm University