Interstellar Complex Organic Molecules in SiO-traced massive outflows
arXiv:2207.09426 · doi:10.3847/1538-4365/ac81cb
Abstract
The interstellar medium contains dust and gas, in which at high densities and cold conditions molecules can proliferate. Interstellar Complex Organic Molecules (iCOMs) are C-bearing species that contain at least six atoms. As they are detected in young stellar objects, iCOMs are expected to inhabit the early stages of the star formation evolution. In this study, we try to determine which iCOMs are present in the outflow component of massive protostars. To do this, we analyzed the morphological extension of blue- and red-shifted iCOMs emission in a sample of eleven massive protostars employing mapping observations at one mm within a ~1 GHz bandwidth for both IRAM-30m and APEX telescopes. We modeled the iCOMs emission of the central pointing spectra of our objects using the XCLASS LTE radiative transfer code. We detected the presence of several iCOMs such as: CH3OH, 13CH3OH, CH3OCHO, C2H5C15N, and c-C3H2)CH2. In G034.41+0.24, G327.29-0.58, G328.81+0.63, G333.13-0.43, G340.97-1.02, G351.45+0.66 and G351.77-0.54, the iCOMs lines show a faint broad line profile. Due to the offset peak positions of the blue- and red-shifted emission, covering from ~0.1 to 0.5 pc, these wings are possibly related to movements external to the compact core, such as large-scale low-velocity outflows. We have also established a correlation between the parent iCOM molecule CH3OH and the shock tracer SiO, reinforcing the hypothesis that shock environments provide the conditions to boost the formation of iCOMs via gas-phase reactions.
arXiv comment21 pages, 10 figures, 4 tables, accepted to APJS
References in corpus (35)
- Observations of the Icy Universe
- Formation of methyl formate and other organic species in the warm-up phase of hot molecular cores
- A Catalog of Extended Green Objects (EGOs) in the GLIMPSE Survey: A new sample of massive young stellar object outflow candidates
- Formation of complex organic molecules in cold objects: the role of gas phase reactions
- ATLASGAL --- towards a complete sample of massive star forming clumps
- The ATLASGAL survey: a catalog of dust condensations in the Galactic plane
- Ammonia from cold high-mass clumps discovered in the inner Galactic disk by the ATLASGAL survey
- Dust as interstellar catalyst I. Quantifying the chemical desorption process
- Complex Molecules in the L1157 Molecular Outflow
- Multilayer modeling of porous grain surface chemistry I. The GRAINOBLE model
- Seeds Of Life In Space (SOLIS): The organic composition diversity at 300--1000 au scale in Solar-type star forming regions
- A molecular survey of outflow gas: velocity-dependent shock chemistry and the peculiar composition of the EHV gas
- Complex organic molecules in the Galactic Centre: the N-bearing family
- eXtended CASA Line Analysis Software Suite (XCLASS)
- L1157-B1, a factory of complex organic molecules in a Solar-type star forming region
- ATLASGAL - Kinematic distances and the dense gas mass distribution of the inner Galaxy
- ATLASGAL-selected massive clumps in the inner Galaxy, II: Characterisation of different evolutionary stages and their SiO emission
- Evolution and excitation conditions of outflows in high-mass star-forming regions
- SiO outflows in high-mass star forming regions: A potential chemical clock?
- SiO emission from low- and high-velocity shocks in Cygnus-X massive dense clumps
- Astrochemistry at work in the L1157-B1 shock: acetaldehyde formation
- SiO and CH3CCH abundances and dust emission in high-mass star-forming cores
- Star formation in a clustered environment around the UCHII region in IRAS 20293+3952
- On the kinematics of massive star forming regions: the case of IRAS 17233-3606
- Seeds of Life in Space (SOLIS). X. Interstellar Complex Organic Molecules in the NGC 1333 IRAS 4A outflows
- A SiO J = 5 - 4 Survey Toward Massive Star Formation Regions
- A 1-mm spectral line survey toward GLIMPSE Extended Green Objects (EGOs)
- Evidence of a SiO collimated outflow from a massive YSO in IRAS 17233-3606
- A multiwavelength study of young massive star forming regions: II. The dust environment
- SiO collimated outflows driven by high-mass YSOs in G24.78+0.08
- Complex Organic Molecules tracing shocks along the outflow cavity in the high-mass protostar IRAS20126+4104
- CSO and CARMA Observations of L1157. II. Chemical Complexity in the Shocked Outflow
- HH 114 MMS: a new chemically active outflow
- The distribution of warm gas in the G327.3--0.6 massive star-forming region
- Molecules in Bipolar Outflows