Holdship, J;
Viti, S;
Codella, C;
Rawlings, J;
Jimenez-Serra, I;
Ayalew, Y;
Curtis, J;
... Horn, S; + view all
(2019)
Observations of CH₃OH and CH₃CHO in a Sample of Protostellar Outflow Sources.
The Astrophysical Journal
, 880
(2)
, Article 138. 10.3847/1538-4357/ab1f8f.
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Abstract
IRAM 30 m Observations toward eight protostellar outflow sources were taken in the 96–176 GHz range. Transitions of CH3OH and CH3CHO were detected in seven of them. The integrated emissions of the transitions of each species that fell into the observed frequency range were measured and fit using RADEX and LTE models. Column densities and gas properties inferred from this fitting are presented. The ratio of the A and E-type isomers of CH3OH indicates that the methanol observed in these outflows was formed on the grain surface. Both species demonstrate a reduction of terminal velocity in their line profiles in faster outflows, indicating destruction in the post-shock gas phase. This destruction, and a near constant ratio of the CH3OH and CH3CHO column densities, imply it is most likely that CH3CHO also forms on the grain surface.
Type: | Article |
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Title: | Observations of CH₃OH and CH₃CHO in a Sample of Protostellar Outflow Sources |
Open access status: | An open access version is available from UCL Discovery |
DOI: | 10.3847/1538-4357/ab1f8f |
Publisher version: | https://doi.org/10.3847/1538-4357/ab1f8f |
Language: | English |
Additional information: | This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions. |
Keywords: | astrochemistry; ISM: jets and outflows; ISM: molecules |
UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
URI: | https://discovery.ucl.ac.uk/id/eprint/10081237 |
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