Supernova 2010ev: A reddened high velocity gradient type Ia supernova

Abstract

Aims. We present and study the spectroscopic and photometric evolution of the type Ia supernova (SN Ia) 2010ev. Methods. We obtain and analyze multi-band optical light curves and optical-near-infrared spectroscopy at low and medium resolution spanning from -7 days to +300 days from the B-band maximum. Results. A photometric analysis shows that SN 2010ev is a SN Ia of normal brightness with a light curve shape of $\Delta m_{15}(B)=1.12\pm 0.02$ and a stretch s = $0.94\pm 0.01$ suffering significant reddening. From photometric and spectroscopic analysis, we deduce a color excess of $E(B-V)=0.25\pm 0.05$ and a reddening law of $R_v=1.54\pm 0.65$. Spectroscopically, SN 2010ev belongs to the broad-line SN Ia group, showing stronger than average Si II λ6355 absorption features. We also find that SN 2010ev is a high-velocity gradient SN, with a value of $164\pm 7$ km s${}^{-1}$ d${}^{-1}$. The photometric and spectral comparison with other supernovae shows that SN 2010ev has similar colors and velocities to SN 2002bo and SN 2002dj. The analysis of the nebular spectra indicates that the [Fe II] λ7155 and [Ni II] λ7378 lines are redshifted, as expected for a high velocity gradient supernova. All these common intrinsic and extrinsic properties of the high velocity gradient (HVG) group are different from the low velocity gradient (LVG) normal SN Ia population and suggest significant variety in SN Ia explosions.

16 pages, 13 figures, 7 tables. Accepted to A&A

References in corpus (27)

• An Analysis of the Shapes of Interstellar Extinction Curves. V. The IR-Through-UV Curve Morphology
• Double-detonation sub-Chandrasekhar supernovae: synthetic observables for minimum helium shell mass models
• Improved Distances to Type Ia Supernovae with Two Spectroscopic Subclasses
• The Spectroscopic Diversity of Type Ia Supernovae
• SiFTO: An Empirical Method for Fitting SNe Ia Light Curves
• The Broad-lined Type Ic SN 2003jd
• The Carnegie Supernova Project: Intrinsic Colors of Type Ia Supernovae
• SN 2003du: 480 days in the Life of a Normal Type Ia Supernova
• Variable Sodium Absorption in a Low-Extinction Type Ia Supernova
• Anomalous extinction behaviour towards the Type Ia SN 2003cg
• Extensive HST Ultraviolet Spectra and Multi-wavelength Observations of SN 2014J in M82 Indicate Reddening and Circumstellar Scattering by Typical Dust
• The rise of SN2014J in the nearby galaxy M82
• The ejected mass distribution of type Ia supernovae: A significant rate of non-Chandrasekhar-mass progenitors
• ESC observations of SN 2005cf. I. Photometric Evolution of a Normal Type Ia Supernova
• The Type Ia supernova 2004S, a clone of SN 2001el, and the optimal photometric bands for extinction estimation
• Comparative Direct Analysis of Type Ia Supernova Spectra. V. Insights from A Larger Sample and Quantitative Subclassification
• Optical and IR observations of SN 2002dj: some possible common properties of fast expanding SNe Ia
• The early spectral evolution of SN 2004dt
• A one-dimensional Chandrasekhar-mass delayed-detonation model for the broad-lined Type Ia supernova 2002bo
• Late Light Curves of Normal Type Ia Supernovae
• Optical and Near-Infrared Polarimetry of Highly Reddened Type Ia Supernova 2014J: Peculiar Properties of Dust in M82
• Diffuse Interstellar Bands vs. Known Atomic and Molecular Species in the Interstellar Medium of M82 toward SN 2014J
• A search for diffuse bands in the circumstellar envelopes of post-AGB stars
• Time-Varying Potassium in High-Resolution Spectra of the Type Ia Supernova 2014J
• Defining Photometric Peculiar Type Ia Supernovae
• Variations of the dust properties of M82 with galactocentric distance
• Outflows in Sodium Excess Objects

Cited by in corpus (14)

• Using late-time optical and near-infrared spectra to constrain Type Ia supernova explosion properties
• Linear spectropolarimetry of 35 Type Ia Supernovae with VLT/FORS: An analysis of the Si II line polarization
• Molecular gas at supernova local environments unveiled by EDGE
• Shedding light on the Type Ia supernova extinction puzzle: dust location found
• The effects of varying colour-luminosity relations on supernova science
• Constraining the Source of the High-velocity Ejecta in Type Ia SN 2019ein
• The Ultraviolet Colors of Type Ia Supernovae and their Photospheric Velocities
• Skynet Algorithm for Single-Dish Radio Mapping I: Contaminant-Cleaning, Mapping, and Photometering Small-Scale Structures
• SN 2014J in M82: New Insights On the Spectral Diversity of Type Ia Supernovae
• Narrow absorption lines from intervening material in supernovae. II. Galaxy properties
• $R_V$ from multi-waveband galaxy polarimetry in supernovae vicinity
• Direct Analysis of the Broad-Line SN 2019ein: Connection with the Core-Normal SN 2011fe
• Narrow absorption lines from intervening material in supernovae: III. Supernovae and their environments
• SN 2017fgc: A Fast-Expanding Type Ia Supernova Exploded in Massive Shell Galaxy NGC 474