The structure of the Orion Nebula in the direction of Theta 1 Ori C

Abstract

We have used existing optical emission and absorption lines, [C II] emission lines, and H I absorption lines to create a new model for a Central Column of material near the Trapezium region of the Orion Nebula. This was necessary because recent high spectral resolution spectra of optical emission lines and imaging spectra in the [C II] 158 micron line have shown that there are new velocity systems associated with the foreground Veil and the material lying between Theta 1 Ori C and the Main Ionization Front of the nebula. When a family of models generated with the spectral synthesis code Cloudy were compared with the surface brightness of the emission lines and strengths of the Veil absorption lines seen in the Trapezium stars, distances from Theta 1 Ori C, were derived, with the closest, highest ionization layer being 1.3 pc. The line of sight distance of this layer is comparable with the size of the inner Huygens Region in the plane of the sky. These layers are all blueshifted with respect to the Orion Nebula Cluster of stars, probably because of the pressure of a hot central bubble created by Theta 1 Ori C's stellar wind. We find velocity components that are ascribed to both sides of this bubble. Our analysis shows that the foreground [C II] 158 micron emission is part of a previously identified layer that forms a portion of a recently discovered expanding shell of material covering most of the larger Extended Orion Nebula.

13 pages, 9 figures, accepted for publication in the Astrophysical Journal

References in corpus (8)

• The distance to the Orion Nebula
• The Gould's Belt Distances Survey (GOBELINS) II. Distances and structure towards the Orion Molecular Clouds
• 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
• The three dimensional dynamic structure of the inner Orion Nebula
• Deviations from He I Case B Recombination Theory and Extinction Corrections in the Orion Nebula
• IRAM-30m large scale survey of ${}^{12}$CO(2-1) and ${}^{13}$CO(2-1) emission in the Orion molecular cloud
• Large Scale Flows from Orion-South

Cited by in corpus (20)

• Expanding bubbles in Orion A: [CII] observations of M42, M43, and NGC 1977
• Protoplanetary disk masses in NGC 2024: Evidence for two populations
• PDRs4All II: JWST's NIR and MIR imaging view of the Orion Nebula
• The 3-D Kinematics of the Orion Nebula Cluster: NIRSPEC-AO Radial Velocities of the Core Population
• Molecular globules in the Veil bubble of Orion. IRAM 30m 12CO, 13CO, and C18O 2-1 expanded maps of Orion A
• Deciphering the 3-D Orion Nebula-I: Expanding Shells in the Huygens Region
• HST survey of the Orion Nebula Cluster in the H${}_2$O 1.4 $\mu$m absorption band: I. A census of substellar and planetary mass objects
• Photoionized Herbig-Haro objects in the Orion Nebula through deep high-spectral resolution spectroscopy II: HH204
• [CII] $158\mu \mathrm{m}$ line emission from Orion A. I. A template for extragalactic studies?
• PDRs4All. X. ALMA and JWST detection of neutral carbon in the externally irradiated disk d203-506: Undepleted gas-phase carbon
• Breaking Orion's Veil bubble with fossil outflows
• Raman mapping of photodissociation regions
• Dents in the Veil: Protostellar feedback in Orion
• SIRIUS Project. V. Formation of off-center ionized bubbles associated with Orion Nebula Cluster
• Multiline observations of hydrogen, helium, and carbon radio-recombination lines toward Orion A: A detailed dynamical study and direct determination of physical conditions
• First Detection of Radio Recombination Lines of Ions Heavier than Helium
• 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
• Backscattering and Line Broadening in Orion
• Deciphering the 3-D Orion Nebula-III: Structure on the NE boundary of the Orion-S Embedded Molecular Cloud
• Large Scale Wind Driven Structures in the Orion Nebula