Gamma rays from a supernova of type Ia: SN2014J

Abstract

SN2014J is the closest supernova of type Ia that occured in the last 40 years. This provides an opportunity for unprecedented observational detail and coverage in many astronomical bands, which will help to better understand the still unknown astrophysics of these supernovae. For the first time, such an event occurs sufficiently nearby so that also gamma rays are able to contribute to such investigations. This is important, as the primary source of the supernova light is the radioactive energy from about 0.5 M${}_{\odot }$ of ${}^{56}$Ni produced in the explosion, and the gamma rays associated with this decay make the supernova shine for months. The INTEGRAL gamma-ray observatory of ESA has followed the supernova emission for almost 5 months. The characteristic gamma ray lines from the ${}^{56}$Ni decay chain through ${}^{56}$Co to ${}^{56}$Fe have been measured. We discuss these observations, and the implications of the measured gamma-ray line characteristics as they evolve.

7 pages, 8 figures; highlight talk at AG conference Bamberg, Germany, Sep 2014

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• A spectral synthesis code for rapid modelling of supernovae
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• 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
• Early 56Ni decay γ-rays from SN2014J suggest an unusual explosion
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• Estimating the First-Light Time of the Type Ia Supernova 2014J in M82
• The effect of helium accretion efficiency on rates of Type Ia supernovae: double-detonations in accreting binaries
• Constraints on the origin of the first light from SN2014J
• Mid-IR Spectra of Type Ia SN 2014J in M82 Spanning the First Four Months
• Expectations for the Hard X-ray Continuum and Gamma-ray Line Fluxes from the Type Ia supernova SN 2014J in M82
• On the gamma-ray emission of Type Ia Supernovae
• Upper limits on the luminosity of the progenitor of type Ia supernova SN2014J

Cited by in corpus (2)

• SN 2014J at M82: I. A middle-class type Ia supernova by all spectroscopic metrics
• Exploration of Aspherical Ejecta Properties in Type Ia Supernova: Progenitor Dependence and Applications to Progenitor Classification