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Tartaglia, L.; Fraser, M.; Sand, D. J.; Valenti, S.; Smartt, S. J.; McCully, C.; Anderson, J. P.; Arcavi, I.; Elias-Rosa, N.; Galbany, L.; Gal-Yam, A.; Haislip, J. B.; Hosseinzadeh, G.; Howell, D. A.; Inserra, C.; Jha, S. W.; Kankare, E.; Lundqvist, P.; Maguire, K.; Mattila, S.; Reichart, D.; Smith, K. W.; Smith, M.; Stritzinger, M.; Sullivan, M.; Taddia, F.; Tomasella, L.
Astrophysical journal. Letters, 02/2017, Letnik: 836, Številka: 1Journal Article
We report initial observations and analysis on the Type IIb SN 2016gkg in the nearby galaxy NGC 613. SN 2016gkg exhibited a clear double-peaked light curve during its early evolution, as evidenced by our intensive photometric follow-up campaign. SN 2016gkg shows strong similarities with other Type IIb SNe, in particular, with respect to the He i emission features observed in both the optical and near-infrared. SN 2016gkg evolved faster than the prototypical Type IIb SN 1993J, with a decline similar to that of SN 2011dh after the first peak. The analysis of archival Hubble Space Telescope images indicate a pre-explosion source at SN 2016gkg's position, suggesting a progenitor star with a ∼mid-F spectral type and initial mass M , depending on the distance modulus adopted for NGC 613. Modeling the temperature evolution within of explosion, we obtain a progenitor radius of R , smaller than that obtained from the analysis of the pre-explosion images ( R ).
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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Povezave do osebnih bibliografij avtorjev | Povezave do podatkov o raziskovalcih v sistemu SICRIS |
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Vir: Osebne bibliografije
in: SICRIS
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