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Early formation of ...
Early formation of carbon monoxide in the Centaurus A supernova SN 2016adj
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Banerjee, D. P. K. (author)
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Joshi, Vishal (author)
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Evans, A. (author)
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Srivastava, Mudit (author)
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Ashok, N. M. (author)
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Gehrz, R. D. (author)
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Connelley, M. S. (author)
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Geballe, T. R. (author)
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Spyromilio, J. (author)
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Rho, J. (author)
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- Roy, Rupak (author)
- Stockholms universitet,Institutionen för astronomi,Oskar Klein-centrum för kosmopartikelfysik (OKC)
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(creator_code:org_t)
- 2018-08-18
- 2018
- English.
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In: Monthly notices of the Royal Astronomical Society. - : Oxford University Press (OUP). - 0035-8711 .- 1365-2966. ; 481:1, s. 806-818
- Related links:
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https://academic.oup...
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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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- We present near-infrared spectroscopy of the NGC 5128 supernova SN 2016adj in the first two months following discovery. We report the detection of first-overtone carbon monoxide emission at similar to 58.2 d after discovery, one of the earliest detections of CO in an erupting supernova. We model the CO emission to derive the CO mass, temperature, and velocity, assuming both pure (CO)-C-12 and a composition that includes (CO)-C-13; the case for the latter is the isotopic analyses of meteoritic grains, which suggest that core-collapse supernovae can synthesize significant amounts of C-13. Our models show that, while the CO data are adequately explained by pure (CO)-C-12, they do not preclude the presence of (CO)-C-13, to a limit of C-12/C-13 > 3, the first constraint on the C-12/C-13 ratio determined from near-infrared observations. We estimate the reddening to the object, and the effective temperature from the energy distribution at outburst. We discuss whether the ejecta of SN 2016adj may be carbon-rich, what the infrared data tell us about the classification of this supernova, and what implications the early formation of CO in supernovae may have for CO formation in supernovae in general.
Subject headings
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Keyword
- techniques: spectroscopic
- supernovae: general
- supernovae: individual: SN 2016adj
- infrared: stars
Publication and Content Type
- ref (subject category)
- art (subject category)
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- By the author/editor
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Banerjee, D. P. ...
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Joshi, Vishal
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Evans, A.
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Srivastava, Mudi ...
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Ashok, N. M.
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Gehrz, R. D.
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show more...
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Connelley, M. S.
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Geballe, T. R.
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Spyromilio, J.
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Rho, J.
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Roy, Rupak
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show less...
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Astronomy Astrop ...
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Stockholm University