2003/06/08 by Glenn J. White, G. J. White, M. Araki +5 · 2 citations
Chemistry · Earth and Planetary Sciences · Physics and Astronomy · #Analytical Chemistry (journal) #Astronomy #Astrophysics #Astrophysics and Star Formation Studies #Atmospheric Ozone and Climate #Atomic physics #Brightness #Chemistry #Diatomic molecule #Line (geometry) #Molecular Spectroscopy and Structure #Molecule #Optics #Orion Nebula #Physics #Spectral line #Stars #Wavelength #astro-ph
paper · pdf · doi:10.1051/0004-6361:20030841
published as Astron.Astrophys. 407 (2003) 589-608 · 19 page compressed postscript file 0.3 MBytes
arxiv created 2003/06/08 · openalex publication_date 2003/08/01 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
The results of a submillimetre wavelength spectral line survey between 455.1–507.4 GHz of the Orion-KL hot cloud core are reported. A total of 254 lines were detected to a main beam brightness temperature sensitivity ~ 1–3 K. The detected lines are identified as being associated with 30 different molecular species or their isotopomeric variants. The strongest line detected was the J = 4–3 transition of the CO molecule. Apart from abundant diatomic rotors such as CO and CS, the spectrum is dominated by SO, SO2 and CH3OH and large organic molecules such as (CH3)2O, CH3CN, C2H3CN, C2H5CN and HCOOCH3 which make up ~72% of the total number of lines; unidentified lines ~13%; and other lines the remaining ~15% of the total. Rotational temperatures and column densities derived using standard rotation diagram analysis techniques were found to range from 70–300 K, and 1014–10 cm respectively.