The spectrum of Orion-KL at 2 millimeters (150-160 GHz)

Details The spectrum of Orion-KL at 2 millimeters (150-160 GHz) The spectrum of Orion-KL at 2 millimeters (150-160 GHz)

Nov 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993apjs...89..155z&link_type=abstract

The Astrophysical Journal Supplement Series (ISSN 0067-0049), vol. 89, no. 1, p. 155-187

Astronomy and Astrophysics

Astronomy

45

Interstellar Gas, Orion Nebula, Radio Spectra, Spectroscopic Analysis, Astronomical Observatories, Atmospheric Density, Radio Astronomy, Wavelengths

Scientific paper

A spectral survey of Orion-KL has been carried out in the 2 mm atmospheric window in the frequency range 149.6-159.6 GHz, using the FCRAO 14 m telescope. Typical sensitivities achieved were TA* approximately 0.03-0.1 K, peak-to-peak. Over 180 spectral lines were detected, including approximately 45 unidentified features. The spectra were measured with a single-sideband receiver and, even at levels of TA* approximately 30 mK, are far from being confusion-limited. Fifteen known species were conclusively identified in Orion in this spectral region, with the largest numbers of lines arising from methyl formate, ethyl cyanide, methanol, and dimethyl ether. These species have beam-averaged column densities of Ntot approximately 0.5-8 x 1015/sq cm. Several other species have been tentatively observed, including acetaldehyde, C2S, and possibly EtOH. The large organic species, however, appear to arise from different regions. For example, CH3CCH and (CH3)2O come primarily from the extended ridge, while EtCN and VyCN exclusively arise in the hot core. This survey clearly demonstrates that the 2 mm window is rich in spectral lines. It also suggests there is much chemical selectivity in the formation of large organic interstellar molecules.

Affiliated with

Also associated with

No associations

Rating

The spectrum of Orion-KL at 2 millimeters (150-160 GHz) does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with The spectrum of Orion-KL at 2 millimeters (150-160 GHz), we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The spectrum of Orion-KL at 2 millimeters (150-160 GHz) will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-809267