Can I read Modelling predicts a molecule-rich disk around the AGB star L2 Puppis on EtoBox?

Modelling predicts a molecule-rich disk around the AGB star L2 Puppis by Van de Sande, M.; Walsh, C.; Danilovich, T.; De Ceuster, F.; Ceulemans, T. is a scholarly article available to read on EtoBox.

What is Modelling predicts a molecule-rich disk around the AGB star L2 Puppis about?

The nearby oxygen-rich AGB star L2 Pup hosts a well-studied nearly edge-on disk. To date, disks around AGB stars have not been chemically studied in detail. By combining a parameterisation commonly used for protoplanetary disks and archival ALMA observations, we retrieved an updated density and temperature structure of this disk. This physical model was then used as input to the first chemical model of an AGB disk. The model shows that the physical structure of the disk has a large impact on its chemistry, with certain species showing large changes in column density relative to a radial outflow, indicating that chemistry could be used as a tracer of disks that cannot be directly imaged. Despite its oxygen-rich nature, the daughter species formed within the disk are surprisingly carbon-rich. Two chemical regimes can be distinguished: cosmic-ray induced chemistry in the midplane and photochemistry induced by the interstellar radiation field in the outer regions. Certain complex organic molecules are formed in the midplane. This occurs via gas-phase chemistry only, as the disk is too warm for dust-gas chemistry. The photochemistry in the outer regions leads to the efficient formation

Author

Van de Sande, M.; Walsh, C.; Danilovich, T.; De Ceuster, F.; Ceulemans, T.

Published

2024

Language

EN