Protostellar outbursts : which chemistry for the envelope ?

Episodic accretion in protostars may trigger luminosity outbursts, and therefore heat up their envelope. The sudden increase of temperature sublimates ice mantles on grains, and the release of new molecules in the gas phase may alter the long-term evolution of the chemical environment. In this study, we investigate the chemical composition of the envelope of an outbursting protostar, by performing a spectral survey with the IRAM-30m telescope, and by applying kinetic chemical models to protostellar envelope simulations.