An ALMA molecular inventory of warm Herbig Ae disks: II. Abundant complex organics and volatile sulphur in the IRS 48 disk

• DOI: 10.48550/arxiv.2402.04002
• Publication Date: 2024-02-06
• Authors: Alice S. Booth; Milou Temmink; E. F. van Dishoeck; Lucy Evans; John D. Ilee; Mihkel Kama; Luke Keyte; Charles J. Law; Margot Leemker; Nienke van der Marel; Hideko Nomura; Shota Notsu; Karin I. Öberg; Catherine Walsh

The Atacama Large Millimeter/submillimeter Array (ALMA) can probe the molecular content of planet-forming disks with unprecedented sensitivity. These observations allow us to build up an inventory volatiles available for forming planets and comets. Herbig Ae transition are fruitful targets due thermal sublimation complex organic molecule (COM) likely H2O-rich ices in these disks. IRS 48 disk shows a particularly rich chemistry that be directly linked its asymmetric dust trap. Here, we present ALMA where detect 16 different molecules make first robust detections H213CO, 34SO, 33SO c-H2COCH2 (ethylene oxide) protoplanetary disk. All emissions, aside from CO, colocated trap this includes newly detected simple such as HCO+, HCN CS. Interestingly, there spatial offsets between families, including COMs sulphur-bearing species, latter being more azimuthally extended located radially further star. abundances relative CH3OH higher than expected protostellar ratios, which implies some degree chemical processing inherited during lifetime. data highlight unique astrochemical laboratory unravel full volatile reservoir at epoch planet comet formation role (re)setting complexity.