Detection of the 847 keV gamma-ray line of radio-active Co56 from the Type Ia Supernova SN2014J in M82 with INTEGRAL

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A team of researchers, including members of the IRAP, discovered the gamma-ray emission from the type Ia supernova SN2014J (distance ~ 3.5 Mpc) by analyzing the observations made by the SPI spectrometer of the space observatory INTEGRAL (International Gamma-Ray Laboratory).

Researchers have observed a nuclear gamma ray at 847 keV which is the signature of the radioactive decay of 56Co nuclei whose half-life equals 77 days. This observation is direct evidence of nucleosynthesis production of a significant amount of 56Co during the explosion of the star. The 56Co nuclei decrease in iron cores and, according to the nucleosynthesis models, supernova explosions are the main source of iron in the Universe. The observations made by INTEGRAL have just confirmed this hypothesis. Detailed analyzes of these data are still ongoing.

INTEGRAL will continue to observe SN2014J for at least another 5 weeks till the end of April.

Supernova SN2014J in M42

Further Resources :

IRAP Contacts :

  • Pierre Jean, pierre.jean@irap.omp.eu
  • Jurgen Knödlseder, jurgen.knodlseder@irap.omp.eu

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