The speciation of carbon in subseafloor hydrothermal systems has direct implications for the maintenance of life in present-day vent ecosystems and possibly the origin of life on early Earth. Carbon monoxide is of particular interest because it represents a key reactant during the abiotic synthesis of reduced carbon compounds via Fischer–Tropsch-type processes. Laboratory experiments were condu...

We present line observations of different molecular species toward the dense core in L483 and its bipolar outflow powered by the Class 0 object IRAS 181480440. CO(2–1) maps show that the outflow is well collimated and asymmetric, and that its gas is warmer than the surrounding cloud by at least a factor of 2. In contrast with the outflows from other Class 0 objects, the CH3OH(2k–1k) lines in L4...

The 2019/2020 Australian wildfires emitted large quantities of atmospheric pollutant gases and aerosols. Using state-of-the-art near-real-time satellite measurements tropospheric composition, we present an analysis several trace their long-range transport, compare to the previous (2018/2019) fire season. Observations carbon monoxide (CO) show that emissions were so intense distinct plume manage...

Context. Highly-collimated outflows are believed to be the earliest stage in outflow evolution, so their study is essential for understanding the processes driving outflows. The BHR71 Bok globule is known to harbour such a highly-collimated outflow, which is powered by a protostar belonging to a protobinary system. Aims. We aimed at investigating the interaction of collimated outflows with the ...

We have studied the infrared spectral characteristics of frozen carbon dioxide (CO2) formed after ion irradiation of several astrophysically relevant ice mixtures at 10 K. Carbon dioxide is in fact readily produced by ion irradiation of icy samples of CO, and CH3OH and mixtures H2O:CO, CO:O2, CO:N2, H2O:CH3OH, H2O:CH4, H2O:CH4:NH3. We have studied the profile (shape, width and peak position) of...

During the purification of macrosphelides A and B in the cultured broth of FO-5050, we discovered two new 1 6-memberedmacrocyclic compounds, macrosphelides C (1) and D (2) (Fig. 1). This paper describes physicochemical properties structural determination and biological activities of 1 and 2. The fermentation of strain FO-5050 was carried out in the same way as reported previously1}. Compound 1 ...

The astronomical gas-phase detection of simple species and small organic molecules in cold pre-stellar cores, with abundances as high as ~10-10 nH, contradicts the generally accepted idea that at 10 K, such species should be fully frozen out on grain surfaces. A physical or chemical mechanism that results in a net transfer from solid-state species into the gas-phase offers a possible explanatio...