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Large-scale interaction of the H II region and the quiescent gas in Orion A

A. Rodríguez-Franco, Jesús Martín-Pintado, J. Gómez-González, Pere Planesas

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Abstract

Large scale, high-angular resolution mapping of Orion A molecular cloud in the J=12→11, J=16→15 and J=24→23 lines of HC 3 N are reported. Besides the molecular ridge, the large scale maps show new long (up to 300″, 0.8 pc) and thin (∼15-25″) molecular filaments (MFs), and «complex» condensations (CCs). All MFs emerge from the molecular ridge and extend to the west. Their typical H 2 densities, kinetic temperatures, and masses are ∼10 5 cm −3 , ∼40 K and 10-30 M ○ . respectively. Most of the MFs show a velocity gradient of 1-2 km/(s × pc) along their length

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What this paper is about

Large scale, high-angular resolution mapping of Orion A molecular cloud in the J=12→11, J=16→15 and J=24→23 lines of HC 3 N are reported. Besides the molecular ridge, the large scale maps show new long (up to 300″, 0.8 pc) and thin (∼15-25″) molecular filaments (MFs), and «complex» condensations (CCs). All MFs emerge from the molecular ridge and extend to the west. Their typical H 2 densities, kinetic temperatures, and masses are ∼10 5 cm −3 , ∼40 K and 10-30 M ○ . respectively. Most of the MFs show a velocity gradient of 1-2 km/(s × pc) along their length

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Available abstract

Large scale, high-angular resolution mapping of Orion A molecular cloud in the J=12→11, J=16→15 and J=24→23 lines of HC 3 N are reported. Besides the molecular ridge, the large scale maps show new long (up to 300″, 0.8 pc) and thin (∼15-25″) molecular filaments (MFs), and «complex» condensations (CCs). All MFs emerge from the molecular ridge and extend to the west. Their typical H 2 densities, kinetic temperatures, and masses are ∼10 5 cm −3 , ∼40 K and 10-30 M ○ . respectively. Most of the MFs show a velocity gradient of 1-2 km/(s × pc) along their length

Key concepts: Physics, Molecular cloud, Astrophysics, Ridge, Orion Nebula, Mean kinetic temperature, Length scale, Scale (ratio)

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Large-scale interaction of the H II region and the quiescent gas in Orion A — Research Paper | ScholarLens