Protostellar chimney flues: are jets and outflows lifting submillimetre dust grains from discs into envelopes?

L. Cacciapuoti, L. Testi, L. Podio +7

Low dust opacity spectral indices ($\beta <1$) measured in the inner envelopes of class 0/I young stellar objects (age $\sim 10^{4-5}$ yr) have been interpreted as the presence of (sub…