The 685--692 GHz Spectrum of the Orion Core

Details The 685--692 GHz Spectrum of the Orion Core The 685--692 GHz Spectrum of the Orion Core

Jun 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995apj...446l..85h&link_type=abstract

Astrophysical Journal Letters v.446, p.L85

Astronomy and Astrophysics

Astronomy

7

Ism: Abundances, Ism: Individual Alphanumeric: Irc2, Ism: Individual Alphanumeric: Omc-1, Ism: Molecules, Line: Identification

Scientific paper

We used the new Max Planck Institute for Extraterrestrial Physics submillimeter spectrometer to measure the 685-692 GHz (438-434 μm) spectrum of the Orion core in the James Clerk Maxwell Telescope's 7" beam. We detected 13 lines from the "Compact Ridge" and "Plateau" outflow over this 7 GHz wide band. Our map of the H13CN J = 8-7 line shows that the densest part of the outflow is more compact (4" FWHM) than the SO-emitting region (˜12"). Observation of both H13CN and HC15N J = 8-7 lines indicates 200 K, 109 cm-3 gas either with an H2 column density of ˜2 × 1024 cm-2 or with modestly enhanced HCN abundances in the warm and dense core of the outflow. Although the true continuum level is clearly present between the lines, the lines are still strong and contribute up to 50% of the total flux in this relatively crowded part of the spectrum.

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