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The low-luminosity ...
The low-luminosity Type II SN2016aqf : a well-monitored spectral evolution of the Ni/Fe abundance ratio
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Müller-Bravo, Tomás E. (author)
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Gutiérrez, Claudia P. (author)
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Sullivan, Mark (author)
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- Jerkstrand, Anders (author)
- Stockholms universitet,Institutionen för astronomi,Oskar Klein-centrum för kosmopartikelfysik (OKC),Max-Planck Institut für Astrophysik, Germany
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Anderson, Joseph P. (author)
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González-Gaitán, Santiago (author)
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- Sollerman, Jesper (author)
- Stockholms universitet,Institutionen för astronomi,Oskar Klein-centrum för kosmopartikelfysik (OKC)
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Arcavi, Iair (author)
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Burke, Jamison (author)
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Galbany, Lluís (author)
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Gal-Yam, Avishay (author)
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Gromadzki, Mariusz (author)
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Hiramatsu, Daichi (author)
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Hosseinzadeh, Griffin (author)
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Howell, D. Andrew (author)
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Inserra, Cosimo (author)
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Kankare, Erki (author)
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Kozyreva, Alexandra (author)
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McCully, Curtis (author)
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Nicholl, Matt (author)
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Smartt, Stephen (author)
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Valenti, Stefano (author)
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Young, Dave R. (author)
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(creator_code:org_t)
- 2020-07-06
- 2020
- English.
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In: Monthly notices of the Royal Astronomical Society. - : Oxford University Press (OUP). - 0035-8711 .- 1365-2966. ; 497:1, s. 361-377
- Related links:
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https://orca.cardiff...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Subject headings
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- Low-luminosity Type II supernovae (LL SNe II) make up the low explosion energy end of core-collapse SNe, but their study and physical understanding remain limited. We present SN 2016aqf, an LL SN II with extensive spectral and photometric coverage. We measure a V-band peak magnitude of −14.58 mag, a plateau duration of ∼100 d, and an inferred 56Ni mass of 0.008 ± 0.002 M⊙. The peak bolometric luminosity, Lbol ≈ 1041.4 erg s−1, and its spectral evolution are typical of other SNe in the class. Using our late-time spectra, we measure the [O i] λλ6300, 6364 lines, which we compare against SN II spectral synthesis models to constrain the progenitor zero-age main-sequence mass. We find this to be 12 ± 3 M⊙. Our extensive late-time spectral coverage of the [Fe ii] λ7155 and [Ni ii] λ7378 lines permits a measurement of the Ni/Fe abundance ratio, a parameter sensitive to the inner progenitor structure and explosion mechanism dynamics. We measure a constant abundance ratio evolution of 0.081+0.009−0.010 and argue that the best epochs to measure the ratio are at ∼200–300 d after explosion. We place this measurement in the context of a large sample of SNe II and compare against various physical, light-curve, and spectral parameters, in search of trends that might allow indirect ways of constraining this ratio. We do not find correlations predicted by theoretical models; however, this may be the result of the exact choice of parameters and explosion mechanism in the models, the simplicity of them, and/or primordial contamination in the measured abundance ratio.
Subject headings
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
Keyword
- techniques: photometric
- spectroscopic telescopes
- supernovae: individual: SN2016aqf
- transients: supernovae
Publication and Content Type
- ref (subject category)
- art (subject category)
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- By the author/editor
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Müller-Bravo, To ...
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Gutiérrez, Claud ...
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Sullivan, Mark
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Jerkstrand, Ande ...
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Anderson, Joseph ...
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González-Gaitán, ...
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show more...
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Sollerman, Jespe ...
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Arcavi, Iair
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Burke, Jamison
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Galbany, Lluís
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Gal-Yam, Avishay
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Gromadzki, Mariu ...
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Hiramatsu, Daich ...
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Hosseinzadeh, Gr ...
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Howell, D. Andre ...
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Inserra, Cosimo
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Kankare, Erki
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Kozyreva, Alexan ...
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McCully, Curtis
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Nicholl, Matt
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Smartt, Stephen
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Valenti, Stefano
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Young, Dave R.
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show less...
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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Stockholm University