Deciphering the 3-D Orion Nebula-III: Structure on the NE boundary of the Orion-S Embedded Molecular Cloud

Abstract

We have extended the work of Papers I and II of this series to determine at higher spatial resolution the properties of the embedded Orion-S Molecular Cloud that lies within the ionized cavity of the Orion Nebula and of the thin ionized layer that lies between the Cloud and the observer. This was done using existing and new [NII](658.3 nm) and [OIII] (500.7 nm) spectra that map the central region of the Orion Nebula (the Huygens Region). However, it remains unclear how the surface brightness of the ionized layer on the Orion-S Molecular Cloud and that of a foreground Nearer Ionized Layer are linked, as the observations show they must be. It is shown that the Cloud modifies the outer parts of the Huygens Region in the direction of the extended hot X-ray gas.

arXiv comment21pages, 7 figures Accepted Astrophysical Journal

References in corpus (17)

• The Gould's Belt Distances Survey (GOBELINS) II. Distances and structure towards the Orion Molecular Clouds
• Compression and ablation of the photo-irradiated cloud the Orion Bar
• Disruption of the Orion Molecular Core 1 by the stellar wind of the massive star ${\theta }^1$ Ori C
• Million-Degree Plasma Pervading the Extended Orion Nebula
• Velocity-resolved [CII] emission and [CII]/FIR Mapping along Orion with Herschel
• Expanding bubbles in Orion A: [CII] observations of M42, M43, and NGC 1977
• The three dimensional dynamic structure of the inner Orion Nebula
• Tearing the Veil: interaction of the Orion Nebula with its neutral environment
• Photoevaporation Flows in Blister HII Regions: I. Smooth Ionization Fronts and Application to the Orion Nebula
• The APEX-CHAMP+ view of the Orion Molecular Cloud 1 core - Constraining the excitation with submillimeter CO multi-line observations
• The Nature and Frequency of Outflows from Stars in the Central Orion Nebula Cluster
• The structure of the Orion Nebula in the direction of Theta 1 Ori C
• Integral field spectroscopy of selected areas of the Bright Bar and Orion-S cloud in the Orion Nebula
• Deciphering the 3-D Orion Nebula-I: Expanding Shells in the Huygens Region
• Orion's Veil: Magnetic field strengths and other properties of a PDR in front of the Trapezium Cluster
• Layers in the Central Orion Nebula
• Deciphering the 3-D Orion Nebula-II: A low-ionization region of multiple velocity components southwest of Theta1OriC confounds interpretation of low velocity resolution studies of temperature, density, and abundance

Cited by in corpus (3)

• Multiline observations of hydrogen, helium, and carbon radio-recombination lines toward Orion A: A detailed dynamical study and direct determination of physical conditions
• Large Scale Wind Driven Structures in the Orion Nebula
• Deciphering the 3-D Orion Nebula-IV: The HH~269 flow emerges from the Orion-S Embedded Molecular Cloud