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Title: Light curve and spectral evolution of the Type IIb supernova 2011fu
Authors: Kumar, Brajesh
Pandey, S. B
Sahu, D. K
Vinko, J
Moskvitin, A. S
Anupama, G. C
Bhatt, V. K
Ordasi, A
Nagy, A
Sokolov, V. V
Sokolova, T. N
Komarova, V. N
Kumar, Brijesh
Bose, S
Roy, R
Sagar, R
Keywords: Supernovae: general;Supernovae: individual: SN 2011fu;Supernovae: individual (SN 1993J);Galaxies: individual (UGC 01626)
Issue Date: 1-May-2013
Publisher: Oxford University Press on behalf of the Royal Astronomical Society
Citation: Monthly Notices of the Royal Astronomical Society, Vol. 431, No. 1, pp. 308-321
Abstract: We present the low-resolution spectroscopic and UBVRI broad-band photometric investigations of the Type IIb supernova (SN) 2011fu, discovered in UGC 01626. The photometric follow-up of this event was initiated a few days after the explosion and covers a period of about 175 d. The early-phase light curve shows a rise, followed by steep decay in all bands, and shares properties very similar to that seen for SN 1993J, with a possible detection of the adiabatic cooling phase. Modelling of the quasi-bolometric light curve suggests that the progenitor had an extended (∼1 × 1013 cm), low-mass (∼0.1 M⊙) H-rich envelope on top of a dense, compact (∼2 × 1011 cm), more massive (∼1.1 M⊙) He-rich core. The nickel mass synthesized during the explosion was found to be ∼0.21 M⊙, slightly larger than that seen for other Type IIb SNe. The spectral modelling performed with synow suggests that the early-phase line velocities for H and Fe ii features were ∼16 000 and ∼14 000 km s−1, respectively. Then, the velocities declined up to day +40 and became nearly constant at later epochs.
Description: Restricted Access
ISSN: 1365-2966
???metadata.dc.rights???: © Royal Astronomical Society
Appears in Collections:Publications based on data from IAO, Hanle
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