Fourier transform spectroscopy of the A3Π−X3Σ− transition of OH+

Hodges, James Neil

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https://hdl.handle.net/2142/96888 Copy

Description

Title

Fourier transform spectroscopy of the A3Π−X3Σ− transition of OH+

Author(s)

Hodges, James Neil

Contributor(s)

Bernath, Peter F.

Issue Date

2017-06-21

Keyword(s)

Astronomy

Abstract

The chem{OH^+} ion is an important species in the Interstellar Medium. It has been used to infer the cosmic ray ionization rate and is an important intermediate for generation of more complex astrochemical species. chem{OH^+} observations are typically performed in the sub-millimeter and near-UV ranges, and rely on laboratory spectroscopy to provide transition frequencies. Observations of the A$^3Pi -$X$^3Sigma^-$ bands are used to both identify chem{OH^+} and determine the column densities along sight lines.footnote{Zhao, D. textit{et al.} 2015, ApJ, 805, L12}_x000d_ _x000d_ These A-X observations have relied on previous measurements with a grating spectrometer and photographic plates.footnote{Merer, A.J. textit{et al.} 1975, CaJPh, 53, 251} Here, we present data recorded at Kitt Peak using a Fourier transform spectrometer of the A-X band system. This data and other available data are combined to determine new molecular constants for the A and X electronic states. These new data are between one and two orders of magnitude more precise and should be used in support of observations in lieu of the older transition frequencies. We also intend to calculate improved line intensities in support of astronomical observations.

Publisher

International Symposium on Molecular Spectroscopy

Type of Resource

text

Language

eng

Permalink

http://hdl.handle.net/2142/96888

DOI

https://doi.org/10.15278/isms.2017.WA08

Copyright and License Information

Copyright 2017 James Neil Hodges

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