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Title:
The spectrum of magnesium hydride
Authors:
Bernath, P. F.; Black, J. H.; Brault, J. W.
Affiliation:
AA(Arizona, University, Tucson, AZ), AB(Steward Observatory, Tucson, AZ), AC(National Solar Observatory, Tucson, AZ)
Publication:
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 298, Nov. 1, 1985, p. 375-381. Research supported by the Petroleum Research Fund. (ApJ Homepage)
Publication Date:
11/1985
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
Astronomical Spectroscopy, Emission Spectra, Interstellar Matter, Magnesium Compounds, Metal Hydrides, High Resolution, Molecular Clouds, Molecular Spectra, Spectral Bands
DOI:
10.1086/163620
Bibliographic Code:
1985ApJ...298..375B

Abstract

Emission spectra of the A2Pi-X2Sigma+ system of MgH have been studied at high resolution and with high signal-to-noise ratio through the use of a Fourier transform spectrometer. On the basis of a rotational analysis of these data, frequencies are predicted for the lowest pure rotational transitions with an accuracy approaching ±30 MHz. Frequencies of the (1,0) vibration-rotation lines are calculated to an accuracy of ±0.002 cm-1. The excitation and observability of MgH in interstellar clouds are discussed.

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Physics
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