Titanium hidden in dust

Cassiopeia A, one of the most intriguing Galactic supernova remnants, has been a target of many observational efforts including most recent observations by Atacama Large Millimeter/submillimeter Array (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 and s...