Observations of CH<SUB>3</SUB>OH and CH<SUB>3</SUB>CHO in a Sample of Protostellar Outflow Sources - Archive ouverte HAL Access content directly
Journal Articles The Astrophysical Journal Year : 2019

Observations of CH3OH and CH3CHO in a Sample of Protostellar Outflow Sources

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1
Jonathan Holdship
  • Function : Author
Serena Viti
  • Function : Author
Jonathan Rawlings
  • Function : Author
Izaskun Jimenez-Serra
  • Function : Author
Yenabeb Ayalew
  • Function : Author
Justin Curtis
  • Function : Author
Annur Habib
  • Function : Author
Jamel Lawrence
  • Function : Author
Sumaya Warsame
  • Function : Author
Sarah Horn
  • Function : Author

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.

Dates and versions

insu-03703563 , version 1 (24-06-2022)

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Jonathan Holdship, Serena Viti, Claudio Codella, Jonathan Rawlings, Izaskun Jimenez-Serra, et al.. Observations of CH3OH and CH3CHO in a Sample of Protostellar Outflow Sources. The Astrophysical Journal, 2019, 880, ⟨10.3847/1538-4357/ab1f8f⟩. ⟨insu-03703563⟩
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