The high resolution vibration-rotation spectrum of SiH+

Domenech, Jose Luis

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https://hdl.handle.net/2142/96816 Copy

Description

Title

The high resolution vibration-rotation spectrum of SiH+

Author(s)

Domenech, Jose Luis

Issue Date

2017-06-22

Keyword(s)

Atacama Large Millimeter/submillimeter Array (ALMA)'s molecular view

Abstract

Silicon bearing molecules account for $sim$~10% of the identified molecules in space. Among those containg hydrogen, SiH and SiH$_4$ have been identified in the solar spectrum, in some cold stars, and SiH$_4$ in IRC+1026. However the simple SiH$^+$ cation (silylidinium) has only been observed in the solar photosphere and it remains undetected in interstellar space. Most of the spectroscopic information on SiH$^+$ comes from the analisis of its vis-UV spectrumfootnote{A. E. Douglas & B. Lutz, Can. J. Phys. 48 (1970) 247}$^,$footnote{T. Carlson et al. Astron. & Astrophys. 83 (1980) 238}, and from a diode laser spectrum combined with velocity modulation of the v=1-0 bandfootnote{P. B. Davies, P. M. Martineau, J. Chem. Phys. 88 (1985) 485}. The latter contained just eight lines measured with an estimated accuracy of 0.001 wn. We present the results obtained with a difference frequency laser spectrometer coupled to a hollow cathode discharge, with an increased number of lines and improved accuracy ($1times 10^{-4}$ wn), allowing for an accurate prediction of the pure rotational transitions. These will be searched for in the Cologne Center for Terahertz Spectroscopy (CCTS). These data will be of use in future searches for this molecule in different astronomical environments.

Publisher

International Symposium on Molecular Spectroscopy

Type of Resource

text

Language

eng

Permalink

http://hdl.handle.net/2142/96816

DOI

https://doi.org/10.15278/isms.2017.RF05

Copyright and License Information

Copyright 2017 Jose Luis Domenech

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