Molecular complexity in protostellar disks and accretion streamers

Planets are the natural outcome of a complex process beginning in the early evolutionary stages of the protostellar disk (Class 0/Istage, age ≤ 10⁵ years). Observations of the inner protostellar regions (~100 au) are therefore fundamental for studying the initial conditions and chemical content available for planet formation. At these early stages, disks strongly interact with their natal envelopes. Over the past five years, observations have increasingly revealed accretion streamers that deliver material from envelope scales (~1000 au) down to planet-formation scales (~50 au). Astrochemistry is a powerful tool for investigating the accretion processes occurring in the planet-forming regions of young embedded disks. In this talk, I will present new results on chemically rich accretion streamers feeding young disks, highlighting the essential role of accretion streamers in building the mass and chemical complexity of young protostellar disks at the onset of planet formation. Finally, I will emphasise the importance of upcoming radio observations (SKAO, ngVLA) for further exploration of the chemistry within the planet formation region.