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SN 2015ba :
SN 2015ba : a Type IIP supernova with a long plateau
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Dastidar, Raya (author)
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Misra, Kuntal (author)
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Hosseinzadeh, G. (author)
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Pastorello, A. (author)
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Pumo, M. L. (author)
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Valenti, S. (author)
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McCully, C. (author)
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Tomasella, L. (author)
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Arcavi, I (author)
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Elias-Rosa, N. (author)
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Singh, Mridweeka (author)
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Gangopadhyay, Anjasha (author)
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Howell, D. A. (author)
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Morales-Garoffolo, Antonia (author)
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Zampieri, L. (author)
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Kumar, Brijesh (author)
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Turatto, M. (author)
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Benetti, S. (author)
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- Tartaglia, Leonardo (author)
- Stockholms universitet,Institutionen för astronomi,Oskar Klein-centrum för kosmopartikelfysik (OKC)
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Ochner, P. (author)
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Sahu, D. K. (author)
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Anupama, G. C. (author)
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Pandey, S. B. (author)
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(creator_code:org_t)
- 2018-06-21
- 2018
- English.
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In: Monthly notices of the Royal Astronomical Society. - : Oxford University Press (OUP). - 0035-8711 .- 1365-2966. ; 479:2, s. 2421-2442
- 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
Subject headings
Close
- We present optical photometry and spectroscopy from about a week after explosion to similar to 272 d of an atypical Type IIP supernova, SN 2015ba, which exploded in the edge-on galaxy IC 1029. SN 2015ba is a luminous event with an absolute V-band magnitude of -17.1 +/- 0.2 mag at 50 d since explosion and has a long plateau lasting for similar to 123 d. The distance to the SN is estimated to be 34.8 +/- 0.7 Mpc using the expanding photosphere and standard candle methods. High-velocity H Balmer components constant with time are observed in the late-plateau phase spectra of SN 2015ba, which suggests a possible role of circumstellar interaction at these phases. Both hydrodynamical and analytical modelling suggest a massive progenitor of SN 2015ba with a pre-explosion mass of 24-26 M-circle dot. However, the nebular spectra of SN 2015ba exhibit insignificant levels of oxygen, which is otherwise expected from a massive progenitor. This might be suggestive of the non-monotonical link between O-core masses and the zero-age main sequence mass of pre-supernova stars and/or uncertainties in the mixing scenario in the ejecta of supernovae.
Subject headings
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Keyword
- techniques: photometric
- techniques: spectroscopic
- supernovae: general
- supernovae: individual: SN 2015ba
- galaxies: individual: IC 1029
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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Dastidar, Raya
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Misra, Kuntal
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Hosseinzadeh, G.
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Pastorello, A.
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Pumo, M. L.
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Valenti, S.
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show more...
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McCully, C.
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Tomasella, L.
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Arcavi, I
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Elias-Rosa, N.
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Singh, Mridweeka
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Gangopadhyay, An ...
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Howell, D. A.
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Morales-Garoffol ...
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Zampieri, L.
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Kumar, Brijesh
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Turatto, M.
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Benetti, S.
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Tartaglia, Leona ...
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Ochner, P.
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Sahu, D. K.
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Anupama, G. C.
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Pandey, S. B.
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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 ...
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Monthly notices ...
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Stockholm University