2023/11/27 by L. Cacciapuoti, Cacciapuoti, L., L. Testi +17 · 1 citation
Physics and Astronomy · Engineering · Agricultural and Biological Sciences · #Astrophysics and Star Formation Studies #SAS software applications and methods #Botanical Research and Chemistry
paper · pdf · doi:10.48550/arxiv.2311.16315
Low dust opacity spectral indices (β< 1) measured in the inner envelopes of class 0/I young stellar objects (age ∼ 104-5 yr) have been interpreted as the presence of (sub-)millimetre dust grains in these environments. The density conditions and the lifetimes of collapsing envelopes have proven unfavorable for the growth of solids up to millimetre sizes. As an alternative, magneto-hydrodynamical simulations suggest that protostellar jets and outflows might lift grains from circumstellar discs and diffuse them in the envelope. We reframe available data for the CALYPSO sample of Class 0/I sources and show tentative evidence for an anti-correlation between the value of β1-3mm measured in the inner envelope and the mass loss rate of their jets and outflows, supporting a connection between the two. We discuss the implications that dust transport from the disc to the inner envelope might have for several aspects of planet formation. Finally, we urge for more accurate measurements of both correlated quantities and extension of this work to larger samples, necessary to further test the transport scenario.