LSQ14efd: observations of the cooling of a shock break-out event in a type Ic Supernova

Abstract

We present the photometric and spectroscopic evolution of the type Ic supernova LSQ14efd, discovered by the La Silla QUEST survey and followed by PESSTO. LSQ14efd was discovered few days after explosion and the observations cover up to ~100 days. The early photometric points show the signature of the cooling of the shock break-out event experienced by the progenitor at the time of the supernova explosion, one of the first for a type Ic supernova. A comparison with type Ic supernova spectra shows that LSQ14efd is quite similar to the type Ic SN 2004aw. These two supernovae have kinetic energies that are intermediate between standard Ic explosions and those which are the most energetic explosions known (e.g. SN 1998bw). We computed an analytical model for the light-curve peak and estimated the mass of the ejecta 6.3 +/- 0.5 Msun, a synthesized nickel mass of 0.25 Msun and a kinetic energy of Ekin = 5.6 +/- 0.5 x 10^51 erg. No connection between LSQ14efd and a GRB event could be established. However we point out that the supernova shows some spectroscopic similarities with the peculiar SN-Ia 1999ac and the SN-Iax SN 2008A. A core-collapse origin is most probable considering the spectroscopic, photometric evolution and the detection of the cooling of the shock break-out.

20 pages, 17 figures, accepted for publication on MNRAS

References in corpus (24)

• The Supernova -- Gamma-Ray Burst Connection
• Observational constraints on the progenitors of core-collapse supernovae : the case for missing high mass stars
• The type Ia supernova SNLS-03D3bb from a super-Chandrasekhar-mass white dwarf star
• Determining the Type, Redshift, and Age of a Supernova Spectrum
• PESSTO : survey description and products from the first data release by the Public ESO Spectroscopic Survey of Transient Objects
• The Spectroscopic Diversity of Type Ia Supernovae
• The metamorphosis of Supernova SN2008D/XRF080109: a link between Supernovae and GRBs/Hypernovae
• On the Rates of Gamma Ray Bursts and Type Ib/c Supernovae
• The Peculiar SN 2005hk: Do Some Type Ia Supernovae Explode as Deflagrations?
• Optical Spectra of 73 Stripped-Envelope Core-Collapse Supernovae
• Strong Ultraviolet Pulse From a Newborn Type Ia Supernova
• SN 2004aw: Confirming Diversity of Type Ic Supernovae
• SN 2003du: 480 days in the Life of a Normal Type Ia Supernova
• APASS Landolt-Sloan BVgri photometry of RAVE stars. I. Data, effective temperatures and reddenings
• The properties of the "standard" type Ic supernova 1994I from spectral models
• The carbon-rich type Ic SN 2007gr: the photospheric phase
• iPTF13bvn: The First Evidence of a Binary Progenitor for a Type Ib Supernova
• The impact of type Ia supernovae on main sequence binary companions
• Possible binary progenitors for the type Ib supernova iPTF13bvn
• The rate of WD-WD head-on collisions may be as high as the SNe Ia rate
• Modelling the Type Ic SN 2004aw: a Moderately Energetic Explosion of a Massive C+O Star without a GRB
• A Trio of GRB-SNe: GRB 120729A, GRB 130215A / SN 2013ez and GRB 130831A / SN 2013fu
• Optical and Near-Infrared Observations of the Peculiar Type Ia Supernova 1999ac
• A search for \textit{Fermi} bursts associated to supernovae and their frequency of occurrence

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