The 14N/15N Isotope Ratio in Dense Molecular Clouds

Details The 14N/15N Isotope Ratio in Dense Molecular Clouds The 14N/15N Isotope Ratio in Dense Molecular Clouds

Jun 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010mss..conferf15a&link_type=abstract

"International Symposium On Molecular Spectroscopy, 65th Meeting, Held 21-25 June, 2010 at Ohio State University. http://molspec

Astronomy and Astrophysics

Astronomy

Astronomical Species And Processes

Scientific paper

Observations of the 3-2 and 1-0 transitions of HNC at 271.981 and 90.663 GHz, H15NC at 266.567 and 88.865 GHz were conducted using the Arizona Radio Observatory (ARO) 12m at 2 and 3mm in wavelength and Submillimeter Telescopes (SMT) at 1mm. The 13C isotopomer was also observed to evaluate the high optical depth in the main isotope, hence the 3-2, 2-1, 1-0 transitions of HN13C at 261.263, 174.179 and 87.090 GHz were recorded as well. Observations were made toward the molecular clouds SgrB2, W31, G34.3, W51M, M17-SW, DR-21, L134, Orion A, W3 (OH), NGC7538 and S156, located at various distances from the Galactic Center. The preliminary results indicate a ratio 14N/15N of 120-200, similarly to the values found in comets.

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