First Images of Phosphorus Molecules toward a Protosolar Analog

The chemistry of phosphorus in star- and planet-forming regions is poorly understood, despite the central role terrestrial biochemistry. We present ALMA Band 3 4 observations PO PN towards Class I protostar B1-a, representing first spatially resolved carriers a Solar-type star forming region. molecules emit from two distinct clumps, which coincide with where protostellar outflow (traced by SiO) interacts filament dense gas CCS). Thus, gas-phase seems to originate shocking interstellar clumps. Based on observed emission patterns, appear be daughter products solid carrier an intermediate volatility between ices silicate grains. Interstellar shocks may therefore play important converting semi-refractory more volatile form prior incorporation into cometary ices. Indeed, (PO+PN)/CH3OH ratio similar B1-a comet 67P, implying comparable reservoir phosphorus. PO/PN ranges ~1-8 across B1-a. northern clump exhibits lower weaker 13CH3OH than southern clump, indicating shock physics at positions. Resolved P additional sources are needed better understand what regulates such variations environments.