Spitzer observations of SN 2014J and properties of mid-IR emission in Type Ia supernovae

Understand

SN 2014J in M82 is the closest Type Ia supernova (SN Ia) in decades.

• The proximity allows for detailed studies of supernova physics and provides insights into the circumstellar and interstellar environment.
• In this work we analyze Spitzer mid-IR data of SN 2014J in the 3.6 and 4.5 {\mu}m wavelength range, together with several other nearby and well-studied SNe Ia.
• We compile the first composite mid-IR light-curve templates from our sample of SNe~Ia, spanning the range from before peak brightness well into the nebular phase.