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molecules:ism:ti-oxide [2019/10/18 13:15] – mueller | molecules:ism:ti-oxide [2020/12/10 11:31] – [Titanium Dioxide] mueller | ||
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==== Titanium Monoxide ==== | ==== Titanium Monoxide ==== | ||
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Absorption bands of **TiO** in the visible have been identified in spectra of stars more than hundred years ago. In fact, these features are instrumental to classify M- and S-type stars. Moreover, TiO is thought to be responsible for the pulsation of Mira stars, one class of variable O-rich late-type stars. However, these features originate from the atmospheres of these stars, not from the circumstellar shells of these stars. | Absorption bands of **TiO** in the visible have been identified in spectra of stars more than hundred years ago. In fact, these features are instrumental to classify M- and S-type stars. Moreover, TiO is thought to be responsible for the pulsation of Mira stars, one class of variable O-rich late-type stars. However, these features originate from the atmospheres of these stars, not from the circumstellar shells of these stars. | ||
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by\\ | by\\ | ||
L. A. Hillenbrand, | L. A. Hillenbrand, | ||
- | //Astron. J.// **143**, Art. No. 37 (2012). | + | //Astron. J.// **143**, Art. No. 37 (2012).\\ |
More recently, the\\ | More recently, the\\ | ||
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and tentatively toward V899 Aql and RX Psc were reported by\\ | and tentatively toward V899 Aql and RX Psc were reported by\\ | ||
K. Smolders, T. Verhoelst, P. Neyskens, J. A. D. L. Blommaert, L. Decin, H. van Winckel, S. van Eck, G. C. Sloan, J. Cami, S. Hony, P. De Cat, J.Menu, and J. Vos.\\ | K. Smolders, T. Verhoelst, P. Neyskens, J. A. D. L. Blommaert, L. Decin, H. van Winckel, S. van Eck, G. C. Sloan, J. Cami, S. Hony, P. De Cat, J.Menu, and J. Vos.\\ | ||
- | A temperature of 600 K was estimated. Even if it is rather uncertain, it is again compatible with circumstellar origin of the emission. | + | A temperature of 600 K was estimated. Even if it is rather uncertain, it is again compatible with circumstellar origin of the emission.\\ |
- | Finally, the detection of rotational transitions in the circumstellar envelope of VY CMa (and others) will be described in the **TiO< | + | Finally, the detection of rotational transitions in the circumstellar envelope of VY CMa (and others) will be described in the **TiO< |
+ | T. Danilovich, C. A. Gottlieb, L. Decin, A. M. S. Richards, K. L. K. Lee, T. Kamiński, N. A. Patel, K. H. Young, and K. M. Menten\\ | ||
+ | investigated\\ | ||
+ | **[[https:// | ||
+ | // | ||
+ | //J// = 11 → 10 transitions with Ω = 1, 2, and 3 were found in the circumstellar envelope of R Doradus up to //v// = 2 and that of IK Taure up to //v// = 1.\\ | ||
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- | The detection of **Titanium Dioxide**, | + | ==== Titanium Dioxide ==== |
+ | |||
+ | The detection of **TiO< | ||
T. Kamiński, C. A. Gottlieb, K. M. Menten, N. A. Patel, K. H. Young, S. Brünken, H. S. P. Müller, M. C. McCarthy, J. M. Winters, and L. Decin,\\ | T. Kamiński, C. A. Gottlieb, K. M. Menten, N. A. Patel, K. H. Young, S. Brünken, H. S. P. Müller, M. C. McCarthy, J. M. Winters, and L. Decin,\\ | ||
**[[https:// | **[[https:// | ||
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- | Contributor(s): | + | Contributor(s): |
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