6533b82cfe1ef96bd128ed71
RESEARCH PRODUCT
Titanium hidden in dust
A. F. IyudinMartin ObergaulingerMartin ObergaulingerEwald Müllersubject
PhysicsHigh Energy Astrophysical Phenomena (astro-ph.HE)010308 nuclear & particles physicsInfraredAstrophysics::High Energy Astrophysical PhenomenaExtinction (astronomy)AstronomyFOS: Physical sciencesAstronomy and AstrophysicsAstrophysics::Cosmology and Extragalactic Astrophysics01 natural sciencesGalaxySupernovaSpace and Planetary ScienceNucleosynthesis0103 physical sciencesAstrophysics::Solar and Stellar AstrophysicsAstrophysics::Earth and Planetary AstrophysicsAstrophysics - High Energy Astrophysical Phenomena010303 astronomy & astrophysicsAstrophysics::Galaxy Astrophysicsdescription
Cassiopeia A, one of the most intriguing galactic supernova remnants, has been a target of many observational efforts including most recent observations by ALMA, Hubble, Herschel, Spitzer, NuSTAR, Integral, and other observatories. We use recent gamma-ray lines observations of the radioactive products of Cas A supernova explosive nucleosynthesis as well as spectral energy densities derived for Cas A at infrared wavelengths to speculate about the possibility of radioactive 44Ti being locked into large dust grains. This suggestion is also supported by the possible observation of a pre-supernova outburst about 80 years before the actual Cas A supernova explosion in 1671 AD by Italian astronomer G.D. Cassini. The plausibility of such a scenario is discussed also with reference to recent supernovae, and to the contribution of core-collapse supernovae to the overall dust production in the Galaxy.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2019-02-06 |