Improved Determination of the 10-00 Rotational Frequency of NH3D+ from the High-resolution Spectrum of the ν4 Infrared Band
Abstract
The high-resolution spectrum of the ν4 band of NH3D+ has been measured by difference frequency IR laser spectroscopy in a multipass hollow cathode discharge cell. From the set of molecular constants obtained from the analysis of the spectrum, a value of 262817 ± 6 MHz (±3σ) has been derived for the frequency of the 10-00 rotational transition. This value supports the assignment to NH3D+ of lines at 262816.7 MHz recorded in radio astronomy observations in Orion-IRc2 and the cold prestellar core B1-bS.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- July 2013
- DOI:
- 10.1088/2041-8205/771/1/L11
- arXiv:
- arXiv:1306.3792
- Bibcode:
- 2013ApJ...771L..11D
- Keywords:
-
- ISM: molecules;
- line: identification;
- methods: laboratory;
- molecular data;
- techniques: spectroscopic;
- Astrophysics - Astrophysics of Galaxies
- E-Print:
- Accepted for publication in the Astrophysical Journal Letters 04 June 2013