SIMBAD references

2005ApJ...624..988B - Astrophys. J., 624, 988-1002 (2005/May-2)

Spectroscopic constants, abundances, and opacities of the TiH molecule.

BURROWS A., DULICK M., BAUSCHLICHER C.W.Jr, BERNATH P.F., RAM R.S., SHARP C.M. and MILSOM J.A.

Abstract (from CDS):

Using previous measurements and quantum chemical calculations to derive the molecular properties of the TiH molecule, we obtain new values for its rovibrational constants, thermochemical data, spectral line lists, line strengths, and absorption opacities. Furthermore, we calculate the abundance of TiH in M and L dwarf atmospheres and conclude that it is much higher than previously thought. We find that the TiH/TiO ratio increases strongly with decreasing metallicity, and at high temperatures can exceed unity. We suggest that, particularly for subdwarf L and M dwarfs, spectral features of TiH near ∼0.52 and 0.94 µm and in the H band may be more easily measurable than heretofore thought. The recent possible identification in the L subdwarf 2MASS J0532 of the 0.94 µm feature of TiH is in keeping with this expectation. We speculate that looking for TiH in other dwarfs and subdwarfs will shed light on the distinctive titanium chemistry of the atmospheres of substellar-mass objects and the dimmest stars.

Abstract Copyright:

Journal keyword(s): Infrared: Stars - Stars: Atmospheres - Stars: Fundamental Parameters - Stars: Low-Mass, Brown Dwarfs - Stars: Subdwarfs

Simbad objects: 5

goto Full paper

goto View the references in ADS

To bookmark this query, right click on this link: simbad:2005ApJ...624..988B and select 'bookmark this link' or equivalent in the popup menu


2021.09.22-05:41:39

© Université de Strasbourg/CNRS

    • Contact