Titanium dioxide, TiO2, is a refractory species that could play a crucial role in the dust-condensation sequence around oxygen-rich evolved stars. We present and discuss the detections of 15 emission lines of TiO2 with ALMA in the complex environment of the red supergiant VY CMa. The observations reveal a highly clumpy, anisotropic outflow in which the TiO2 emission likely traces gas exposed to the stellar radiation field. We find evidence for a roughly east-west oriented, accelerating bipolar-like structure, of which the blue component runs into and breaks up around a solid continuum component. We see a distinct tail to the south-west for some transitions, consistent with features seen in the optical and near-infrared. We find that a signi...
Context. The formation of silicate dust in oxygen-rich envelopes of evolved stars is thought to be i...
The processes leading to dust formation and the subsequent role it plays in driving mass loss in coo...
Author Institution: I. Physikalisches Institut, Universitat zu Koln, 50937 Koln, Germany ; Max-Planc...
Titanium dioxide, TiO2, is a refractory species that could play a crucial role in the dust-condensat...
International audienceTitanium dioxide, TiO2, is a refractory species that could play a crucial role...
Context. Titanium dioxide, TiO2, is a refractory species that could play a crucial role in the dust-...
Titanium dioxide, TiO$_2$, is a refractory species that could play a crucial role in the dust-conden...
Context. Titanium dioxide, TiO2, is a refractory species that could play a crucial role in the dust-...
We report the first detection of pure rotational transitions of TiO and TiO2 at (sub-)millimeter wav...
Circumstellar envelopes around late-type stars harbour a rich variety of molecular gas and copious a...
We report the first detection of pure rotational transitions of TiO and TiO2 at (sub-)millimeter wav...
Context. The formation of silicate dust in oxygen-rich envelopes of evolved stars is thought to be i...
Context. The formation of silicate dust in oxygen-rich envelopes of evolved stars is thought to be i...
The processes leading to dust formation and the subsequent role it plays in driving mass loss in coo...
Author Institution: I. Physikalisches Institut, Universitat zu Koln, 50937 Koln, Germany ; Max-Planc...
Titanium dioxide, TiO2, is a refractory species that could play a crucial role in the dust-condensat...
International audienceTitanium dioxide, TiO2, is a refractory species that could play a crucial role...
Context. Titanium dioxide, TiO2, is a refractory species that could play a crucial role in the dust-...
Titanium dioxide, TiO$_2$, is a refractory species that could play a crucial role in the dust-conden...
Context. Titanium dioxide, TiO2, is a refractory species that could play a crucial role in the dust-...
We report the first detection of pure rotational transitions of TiO and TiO2 at (sub-)millimeter wav...
Circumstellar envelopes around late-type stars harbour a rich variety of molecular gas and copious a...
We report the first detection of pure rotational transitions of TiO and TiO2 at (sub-)millimeter wav...
Context. The formation of silicate dust in oxygen-rich envelopes of evolved stars is thought to be i...
Context. The formation of silicate dust in oxygen-rich envelopes of evolved stars is thought to be i...
The processes leading to dust formation and the subsequent role it plays in driving mass loss in coo...
Author Institution: I. Physikalisches Institut, Universitat zu Koln, 50937 Koln, Germany ; Max-Planc...