Supernova 2010ev: a reddened high velocity gradient type Ia supernova
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Archivos
Fecha
2016-04
Profesor/a Guía
Facultad/escuela
Idioma
en
Título de la revista
ISSN de la revista
Título del volumen
Editor
EDP Sciences
Nombre de Curso
Licencia CC
Atribution 4.0 International (CC BY 4.0)
Licencia CC
https://creativecommons.org/licenses/by/4.0/deed.es
Resumen
Ams. We present and study the spectroscopic and photometric evolution of the type Ia supernova (SN Ia) 2010ev.
Methods. We obtain and analyze multiband optical light curves and optical/near-infrared spectroscopy at low and medium resolution
spanning −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 ∆m15(B) =
1.12 ± 0.02 and a stretch s = 0.94 ± 0.01 suffering significant reddening. From photometric and spectroscopic analysis, we deduce
a color excess of E(B − V) = 0.25 ± 0.05 and a reddening law of Rv = 1.54 ± 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 ˙vSi = 164 ± 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.
Notas
Indexación: Scopus.
Palabras clave
Supernovae: General, Supernovae: Individual: SN 2010ev
Citación
Astronomy and Astrophysics. Volume 590. 28 April 2016 . Article number A5
DOI
DOI: 10.1051/0004-6361/201527228