The Rotationally Resolved Infrared Spectrum of TiO and Its Isotopologues

Abstract

In this study, we present the ro-vibrationally resolved gas-phase spectrum of the diatomic molecule TiO around 1000\,cm${}^{-1}$. Molecules were produced in a laser ablation source by vaporizing a pure titanium sample in the atmosphere of gaseous nitrous oxide. Adiabatically expanded gas, containing TiO, formed a supersonic jet and was probed perpendicularly to its propagation by infrared radiation from quantum cascade lasers. Fundamental bands of ${}^{46-50}$TiO and vibrational hotbands of ${}^{48}$TiO are identified and analyzed. In a mass-independent fitting procedure combining the new infrared data with pure rotational and electronic transitions from the literature, a Dunham-like parameterization is obtained. From the present data set, the multi-isotopic analysis allows to determine the spin-rotation coupling constant $\gamma$ and the Born-Oppenheimer correction coefficient ${\Delta }_{{\mathrm{U}}_{10}}^{\mathrm{Ti}}$ for the first time. The parameter set enables to calculate the Born-Oppenheimer correction coefficients ${\Delta }_{{\mathrm{U}}_{02}}^{\mathrm{Ti}}$ and ${\Delta }_{{\mathrm{U}}_{02}}^{\mathrm{O}}$. In addition, the vibrational transition moments for the observed vibrational transitions are reported.

arXiv comment2 figures

References in corpus (21)

• The ExoMol database: molecular line lists for exoplanet and other hot atmospheres
• ExoMol Molecular linelists -- XXXIII. The spectrum of Titanium Oxide
• Detection of H2O and evidence for TiO/VO in an ultra hot exoplanet atmosphere
• Duo: a general program for calculating spectra of diatomic molecules
• HST hot Jupiter transmission spectral survey: evidence for aerosols and lack of TiO in the atmosphere of WASP-12b
• An HST Optical to Near-IR Transmission Spectrum of the Hot Jupiter WASP-19b: Detection of Atmospheric Water and Likely Absence of TiO
• Pure rotational spectra of TiO and TiO_2 in VY Canis Majoris
• How Mira Variables Change Visual Light by a Thousand-fold
• MARVEL analysis of the measured high-resolution rovibronic spectra of ${}^{48}$Ti${}^{16}$O
• Revisiting INTEGRAL/SPI observations of 44Ti from Cassiopeia A
• V4332 Sagittarii: A circumstellar disc obscuring the main object
• An observational study of dust nucleation in Mira ($o$ Ceti): II. Titanium oxides are negligible for nucleation at high temperatures
• Assessing Spectra and Thermal Inversions due to TiO in Hot Jupiter Atmospheres
• Galactic survey of 44Ti sources with the IBIS telescope onboard INTEGRAL
• Terahertz spectroscopy of N${}^{18}$O and isotopic invariant fit of several nitric oxide isotopologs
• Rotational spectra of vibrationally excited AlO and TiO in oxygen rich stars
• Mass-independent analysis of the stable isotopologues of gas-phase titanium monoxide -- TiO
• Analysis of the TiO isotopologues in stellar optical spectra
• Isotopic Titanium Abundances in Local M Dwarfs
• Reducing Uncertainties in the Production of the Gamma Emitting Nuclei 26Al, 44Ti, and 60Fe in Core Collapse Supernovae by Using Effective Helium Burning Rates
• Discovery of a TiO emission band in the infrared spectrum of the S star NP Aurigae

Cited by in corpus (4)

• ATOMIUM: Molecular inventory of 17 oxygen-rich evolved stars observed with ALMA
• Observational predictions for Thorne-Żytkow objects
• Dual-comb Spectroscopy of Ammonia Formation in Non-thermal Plasmas
• Global isotopic analysis of hyperfine-resolved rotational spectroscopic data for barium monofluoride, BaF