The A2Π–X2Σ+ Band System of YO

YO bands are conspicuous in the spectra of S stars. The laboratory spectrum of the A2Π–X2Σ+ electronic transition has been recorded with a Fourier transform spectrometer using a composite-wall hollow cathode lamp source. The A2Π–X2Σ+ transition with v′≤4 and v″ ≤ 4 has been rotationally analyzed usi...

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Bibliographic Details
Published in:	The Astrophysical journal Vol. 974; no. 1; pp. 53 - 58
Main Authors:	Bernath, Peter F, Bhusal, Manish, Pastorek, Adam
Format:	Journal Article
Language:	English
Published:	Philadelphia The American Astronomical Society 01-10-2024 IOP Publishing
Subjects:	Dipole moments Fourier transform spectrometers Fourier transforms Hollow cathodes Line spectra Molecular spectroscopic constants Rotational spectroscopy S stars Spectral line lists
Online Access:	Get full text
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Summary:	YO bands are conspicuous in the spectra of S stars. The laboratory spectrum of the A2Π–X2Σ+ electronic transition has been recorded with a Fourier transform spectrometer using a composite-wall hollow cathode lamp source. The A2Π–X2Σ+ transition with v′≤4 and v″ ≤ 4 has been rotationally analyzed using the modern spectral fitting program PGOPHER. Vibronic band strengths were calculated using an ab initio transition dipole moment function. A line list for the A2Π–X2Σ+ transition is provided and can be utilized in the modeling of S stars.
Bibliography:	AAS56555 Laboratory Astrophysics, Instrumentation, Software, and Data
ISSN:	0004-637X 1538-4357
DOI:	10.3847/1538-4357/ad6e79