Analysis of the TiO isotopologues in stellar optical spectra

@article{Pavlenko2020AnalysisOT,
  title={Analysis of the TiO isotopologues in stellar optical spectra},
  author={Y. Pavlenko and S. Yurchenko and L. McKemmish and J. Tennyson},
  journal={Astronomy and Astrophysics},
  year={2020},
  volume={642}
}
This study is based on the use of the new ExoMol TiO rovibronic line lists to identify and model TiO isotopologue features in spectra of M-dwarfs. We aim to investigate problems involving the computation of electronic bands for different isotopologues of TiO by modelling optical spectra of late-type stars and to determine their Ti isotopic abundances, to compare the TiO isotopologues spectra computed using line lists by different authors. We fit theoretical synthetic spectra to the observed… Expand

Figures and Tables from this paper

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 aExpand
Is TiO emission present in the ultra-hot Jupiter WASP-33b? A reassessment using the improved ExoMol TOTO line list
[abridged] Efficient absorption of stellar UV and visible radiation by TiO and VO is predicted to drive temperature inversions in the upper atmospheres of hot Jupiters. However, few inversions orExpand
Isotope Shifts in the Metastable a$^5$F and Excited y$^5$G$^\circ$ Terms of Atomic Titanium
We measure and analyze the isotope shifts the multiplet of transitions between the metastable a$^5$F and excited y$^5$G$^\circ$ terms of neutral titanium by probing a titanium vapor in a hollowExpand
The 2020 release of the ExoMol database: Molecular line lists for exoplanet and other hot atmospheres
Abstract The ExoMol database ( www.exomol.com ) provides molecular data for spectroscopic studies of hot atmospheres. While the data are intended for studies of exoplanets and other astronomicalExpand
The W2020 Database of Validated Rovibrational Experimental Transitions and Empirical Energy Levels of Water Isotopologues. II. H217O and H218O with an Update to H216O
The W2020 database of validated experimental transitions and accurate empirical energy levels of water isotopologues, introduced in the work of Furtenbacher et al. [J. Phys. Chem. Ref. Data 49,Expand

References

SHOWING 1-10 OF 70 REFERENCES
Exploring the formation and evolution of planetary systems : proceedings of the 299th symposium of the International Astronomical Union, held in Victoria, Canada, June 2-7, 2013
Preface 1. High contrast AO imaging: latest results in direct exoplanet imaging 2. Peering into circumstellar disks: transformative interferometry and high resolution imaging 3. Building planets inExpand
Astronomical Spectroscopy: An Introduction to the Atomic and Molecular Physics of Astronomical Spectra
Why Record Spectra of Astronomical Objects? The Nature of Spectra Atomic Hydrogen Complex Atoms Helium Spectra Alkali Atoms Nebulae Spectra X-Ray Spectra Magnetic Field Effects Molecular StructureExpand
Opacity of TiO from a coupled electronic state calculation parametrized by abinitio and experimental data
We have carried out calculations of ro-vibrational energy levels of the 13 lowest electronic states of TiO. The dominant couplings between the various states are included, with the couplingExpand
Spectral synthesis of TiO lines
We explore the extent to which current titanium oxide (TiO) line data and M dwarf model atmo- spheres can be used to reproduce an R \ 120,000 optical spectrum of the relatively inactive star GlieseExpand
INFRARED ATLAS OF THE ARCTURUS SPECTRUM, 0.9-5.3 MICRONS
A spectral atlas of the infrared spectrum of the bright K 2 giant Arcturus has been completed using the 4 meter Mayall telescope and FTS. The 0.9-5.3 micron spectrum of Arcturus was observed at highExpand
Table of the isotopic compositions of the elements
Isotopes of titanium in cool stars
Isotopic abundance ratios for titanium are reported for a sample of late-type dwarfs and giants. High-resolution (0.07 A) Reticon spectra of portions of the TiO lambda (0, 0), lambda (0, 1), andExpand
Isotopes of titanium in Aldebaran.
The titanium isotopic abundance ratios in the K5 giant Aldebaran (..cap alpha.. Tau) are estimated from photoelectric high-resolution (..delta..lambda=40 mA) scans of portions of the TiOExpand
Titanium Isotopes Provide Clues to Lunar Origin
  • A&A
  • 1998
...
1
2
3
4
5
...