Emission spectra of TiH and TiD near 938 nm

High resolution, near infrared emission spectra of TiH and TiD have been recorded with a Fourier transform spectrometer. The TiH and TiD molecules were made in a titanium hollow cathode lamp operated with a mixture of neon and hydrogen or deuterium gases. A heavily perturbed band system near 938 nm is assigned as a Φ4–X 4Φ electronic transition. Line positions and approximate spectroscopic constants are reported for the 0–0 band of the new transition. The Φ4–X 4Φ TiH transition might potentially be observed in late M-type stars and in L-type brown dwarfs.