Detection of Vibrationally Excited Ethyl Cyanide in the Interstellar Medium

Details Detection of Vibrationally Excited Ethyl Cyanide in the Interstellar Medium Detection of Vibrationally Excited Ethyl Cyanide in the Interstellar Medium

Jun 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004apj...608..306m&link_type=abstract

The Astrophysical Journal, Volume 608, Issue 1, pp. 306-313.

Astronomy and Astrophysics

Astronomy

13

Ism: Abundances, Ism: Clouds, Ism: Individual: Name: Sagittarius B2(N-Lmh), Ism: Molecules, Radio Lines: Ism

Scientific paper

We have identified vibrationally excited CH3CH2CN (ethyl cyanide) for the first time in the interstellar medium. Using the Caltech Submillimeter Observatory, the Berkeley-Illinois-Maryland Association Array, and the Caltech Millimeter Array, we have detected several transitions from both the vb=1 in-plane bending state and the vt=1 torsional state in the Sgr B2(N-LMH) source. Because these excited states lie near 300 K above ground, vibrationally excited CH3CH2CN is potentially a useful probe of the hottest regions of dense, dusty molecular cloud cores where massive star formation is occurring. In addition, this identification will help account for many unidentified and misidentified spectral lines observed in hot molecular cores.

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