Light curve and spectral evolution of the type IIb supernova 2011fu

Kumar, B. ; Pandey, S. B. ; Sahu, D. K. ; Vinko, J. ; Moskvitin, A. S. ; Anupama, G. C. ; Bhatt, V. K. ; Ordasi, A. ; Nagy, A. ; Sokolov, V. V. ; Sagar, R. (2013) Light curve and spectral evolution of the type IIb supernova 2011fu Monthly Notices of the Royal Astronomical Society, 431 (1). pp. 308-321. ISSN 0035-8711

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Official URL: http://mnras.oxfordjournals.org/content/431/1/308

Related URL: http://dx.doi.org/10.1093/mnras/stt162

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 ∼16000 and ∼14000 km s−1, respectively. Then, the velocities declined up to day +40 and became nearly constant at later epochs.

Item Type:Article
Source:Copyright of this article belongs to Royal Astronomical Society.
Keywords:Supernovae: General; Supernovae: Individual: SN 2011fu; Supernovae: Individual (SN 1993J); Galaxies: Individual (UGC 01626)
ID Code:98438
Deposited On:11 Jul 2014 12:13
Last Modified:22 Nov 2019 05:22

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