Document Type

Article

Publication Date

8-8-2018

DOI

10.3847/1538-4357/aacf07

Publication Title

The Astrophysical Journal

Volume

863

Issue

1

Pages

36 (1-4)

Abstract

Recent limitations in the TiO line list used in cross-correlation detection schemes have made the detection and quantification of TiO in exoplanetary atmospheres challenging. The quality of the line list appears to degrade at wavelengths shorter than 630 nm. The C3Δ-X3Δ electronic transition has strong rovibronic bands near 500 nm. In an effort to improve the line list, a spectrum of TiO in a furnace at 1950 K is analyzed, and the assigned lines of the C3Δ-X3Δ transition are fit with the N2 Hamiltonian in the molecular spectrum fitting software, PGOPHER. Several newly determined molecular constants are reported and the average error in fitting the line positions is 0.017 cm−1 or ∼1 ppm relative error. The new line positions are expected to resolve any problems with cross-correlation templates near 500 nm.

Rights

© The American Astronomical Society. Reproduced with permission.

Included with the kind written permission of the publisher and the author.

Original Publication Citation

Hodges, J. N., & Bernath, P. F. (2018). Fourier transform spectroscopy of the C³Δ-X³Δ transition of TiO in support of exoplanet spectroscopy. The Astrophysical Journal, 863(1), 1-4, Article 36. https://doi.org/10.3847/1538-4357/aacf07

ORCID

0000-0002-1255-396X (Bernath)

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