Vol. 551
In section 6. Interstellar and circumstellar matter

Pure rotational spectra of TiO and TiO2 in VY Canis Majoris

by T. Kaminski, C.A. Gottlieb, K.M. Menten, N.A. Patel, K.H. Young, S. Brucken, H.S.P. Muller, et al, A&A 551, A113


Titanium is highly depleted in the interstellar medium, and partly as a consequence, understanding the spatial distribution of gas phase Ti in AGB and supergiant outflows is of great interest. It is in the circumstellar shells around such stars that the refractory dust particles causing this depletion are formed. In the article by Kaminski et al. highlighted this week, the authors announce the first detection of the rotational transitions of TiO and TiO2 towards the red supergiant VY Canis Majoris. The results suggest that a non-negligible fraction of Ti remains in the gas phase in this outflow.