Comparing Complex Chemistry in Neighboring Hot Cores: NOEMA Studies of W3(H${}_2$O) and W3(OH)

Abstract

Presented here are NOEMA interferometric observations of the neighboring hot cores W3(H${}_2$O) and W3(OH). The presence of two star-forming cores at different evolutionary stages within the same parent cloud presents a unique opportunity to study how the physics of the source and its evolutionary stage impact the chemistry. Through spectral analysis and imaging, we identify over twenty molecules in these cores. Most notably, we have detected HDO and CH${}_3$CH${}_2$CN in W3(OH), which were previously not detected in this core. We have imaged the molecular emission, revealing new structural features within these sources. W3(OH) shows absorption in a "dusty cocoon" surrounded by molecular emission. These observations also reveal extended emission that is potentially indicative of a low-velocity shock. From the information obtained herein, we have constructed column density and temperature maps for methanol and compared this information to the molecular images. By comparing the spatial distribution of molecules which may be destroyed at later stages of star formation, this work demonstrates the impact of physical environment on chemistry in star-forming regions at different evolutionary stages.

arXiv commentPublished in The Astrophysical Journal

References in corpus (25)

• Astropy: A Community Python Package for Astronomy
• The Astropy Project: Building an inclusive, open-science project and status of the v2.0 core package
• The Astropy Project: Sustaining and Growing a Community-oriented Open-source Project and the Latest Major Release (v5.0) of the Core Package
• Formation of methyl formate and other organic species in the warm-up phase of hot molecular cores
• The Spitzer ice legacy: Ice evolution from cores to protostars
• Detection of the simplest sugar, glycolaldehyde, in a solar-type protostar with ALMA
• Cometary Chemistry and the Origin of Icy Solar System Bodies, the view after Rosetta
• Formation of complex organic molecules in hot molecular cores through nondiffusive grain-surface and ice-mantle chemistry
• Hot gas and dust in a protostellar cluster near W3(OH
• Complex Structure in Class 0 Protostellar Envelopes II: Kinematic Structure from Single-Dish and Interferometric Molecular Line Mapping
• The impact of shocks on the chemistry of molecular clouds: high resolution images of chemical differentiation along the NGC1333-IRAS2A outflow
• Prebiotic precursors of the primordial RNA world in space: Detection of NH${}_2$OH
• Deuterium chemistry in the Orion Bar PDR - "warm" chemistry starring CH2D+
• SMA millimeter observations of Hot Molecular Cores
• Comparative study of complex N- and O-bearing molecules in hot molecular cores
• Herschel Observations of the W3 GMC: Clues to the Formation of Clusters of High-Mass Stars
• Core fragmentation and Toomre stability analysis of W3(H2O): A case study of the IRAM NOEMA large program CORE
• Complex Organic Molecules at High Spatial Resolution Toward Orion-KL II: Kinematics
• Complex Organic Molecules at High Spatial Resolution Toward Orion-KL I: Spatial Scales
• SMA Observations of W3(OH) Complex: Physical and Chemical Differentiation between W3(H${}_2$O) and W3(OH)
• Chemistry of the High-Mass Protostellar Molecular Clump IRAS 16562-3959
• SMA observations of the W3(OH) complex: Dynamical differentiation between W3(H${}_2$O) and W3(OH)
• Disks and outflows in the massive protobinary system W3(OH)TW
• Structure and Composition of Molecular Clouds with CN Zeeman Detections I: W3OH
• High Resolution Mid-infrared Imaging of W3(OH)

Cited by in corpus (1)

• Mapping Physical Conditions in Neighboring Hot Cores: NOEMA Studies of W3(H${}_2$O) and W3(OH)