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- W4313015020 abstract "Abstract S-type AGB stars, with C/O ratios close to 1, are expected to have a mixed circumstellar chemistry as they transition from being oxygen-rich stars to carbon-rich stars. Recently, several different carbonaceous molecules, thought to be more characteristic of carbon stars, have been found in the circumstellar envelope of the S-type AGB star W Aql. We have obtained new high spatial resolution ALMA images of some of these molecules, specifically HC 3 N, SiC 2 and SiC, and SiN, which we present here. We report diverse behaviour for these molecules, with SiC 2 being seen with a symmetric spatial distribution around the star, SiN and SiC being asymmetrically distributed to the north-east of the star, and HC 3 N being seen in a broken shell to the south-west. These differing distributions point to complex dynamics in the circumstellar envelope of W Aql." @default.
- W4313015020 created "2023-01-05" @default.
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- W4313015020 date "2020-11-01" @default.
- W4313015020 modified "2023-10-17" @default.
- W4313015020 title "The distribution of carbonaceous molecules and SiN around the S-type AGB star W Aquilae" @default.
- W4313015020 doi "https://doi.org/10.1017/s1743921322000096" @default.
- W4313015020 hasPublicationYear "2020" @default.
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