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• W2528456005 abstract "The formation of silicate dust in oxygen-rich envelopes of evolved stars is thought to be initiated by formation of seed particles that can withstand the high temperatures close to the stellar photosphere and act as condensation cores farther away from the star. Candidate species considered as first condensates are TiO and TiO$_2$. We aim to identify and characterize the circumstellar gas-phase chemistry of titanium that leads to the formation of solid titanium compounds in the envelope of $o$ Cet, the prototypical Mira, and seek an observational verification of whether titanium oxides play a major role in the onset of dust formation in M-type AGB stars. We present high angular-resolution ALMA observations at submillimeter (submm) wavelengths supplemented by APEX and Herschel spectra of the rotational features of TiO and TiO$_2$. In addition, circumstellar features of TiO and TiI are identified in optical spectra which cover multiple pulsation cycles of $o$ Cet. The submm ALMA data reveal TiO and TiO$_2$ bearing gas within the extended atmosphere of Mira. While TiO is traceable up to a radius (FWHM/2) of 4.0 R$_{star}$, TiO$_2$ extends as far as 5.5 R$_{star}$ and unlike TiO appears to be anisotropically distributed. Optical spectra display variable emission of TiI and TiO from inner parts of the extended atmosphere (<3 R$_{star}$). Chemical models which include shocks are in general agreement with the observations of gas-phase titanium-bearing molecules. It is unlikely that substantial amounts of titanium is locked up in solids because the abundance of the gaseous titanium species is very high. In particular, formation of hot titanium-rich condensates is very improbable because we find no traces of their hot precursor species in the gas phase. It therefore appears unlikely that the formation of dust in Mira, and possibly other M-type AGB stars, is initiated by titanium oxides." @default.
• W2528456005 created "2016-10-14" @default.
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• W2528456005 date "2016-10-04" @default.
• W2528456005 modified "2023-10-16" @default.
• W2528456005 title "An observational study of dust nucleation in Mira ($o$ Ceti): II. Titanium oxides are negligible for nucleation at high temperatures" @default.
• W2528456005 cites W1535518384 @default.
• W2528456005 cites W1588138813 @default.
• W2528456005 cites W1596512489 @default.
• W2528456005 cites W1599814867 @default.
• W2528456005 cites W1630036344 @default.
• W2528456005 cites W1641908580 @default.
• W2528456005 cites W1649947396 @default.
• W2528456005 cites W1706143665 @default.
• W2528456005 cites W1766229305 @default.
• W2528456005 cites W1802710920 @default.
• W2528456005 cites W1968397257 @default.
• W2528456005 cites W1969916078 @default.
• W2528456005 cites W1970302961 @default.
• W2528456005 cites W1973072738 @default.
• W2528456005 cites W1974928278 @default.
• W2528456005 cites W1976772683 @default.
• W2528456005 cites W1979262238 @default.
• W2528456005 cites W1980771749 @default.
• W2528456005 cites W198228122 @default.
• W2528456005 cites W1982666129 @default.
• W2528456005 cites W1985105444 @default.
• W2528456005 cites W1987953554 @default.
• W2528456005 cites W1992033117 @default.
• W2528456005 cites W2001011713 @default.
• W2528456005 cites W2025058863 @default.
• W2528456005 cites W2028565025 @default.
• W2528456005 cites W2030600424 @default.
• W2528456005 cites W2034807285 @default.
• W2528456005 cites W2036027538 @default.
• W2528456005 cites W2048451376 @default.
• W2528456005 cites W2049923374 @default.
• W2528456005 cites W2058552053 @default.
• W2528456005 cites W2065059646 @default.
• W2528456005 cites W2068453841 @default.
• W2528456005 cites W2070584485 @default.
• W2528456005 cites W2072125203 @default.
• W2528456005 cites W2072737881 @default.
• W2528456005 cites W2075739304 @default.
• W2528456005 cites W2076146362 @default.
• W2528456005 cites W2079968554 @default.
• W2528456005 cites W2080070630 @default.
• W2528456005 cites W2081970106 @default.
• W2528456005 cites W2082385652 @default.
• W2528456005 cites W2083007958 @default.
• W2528456005 cites W2085158809 @default.
• W2528456005 cites W2086824162 @default.
• W2528456005 cites W2093877167 @default.
• W2528456005 cites W2094974411 @default.
• W2528456005 cites W2096471541 @default.
• W2528456005 cites W2104296329 @default.
• W2528456005 cites W2109218908 @default.
• W2528456005 cites W2109519881 @default.
• W2528456005 cites W2112772428 @default.
• W2528456005 cites W2118955801 @default.
• W2528456005 cites W2119494275 @default.
• W2528456005 cites W2120931289 @default.
• W2528456005 cites W2121018712 @default.
• W2528456005 cites W2130491796 @default.
• W2528456005 cites W2135192204 @default.
• W2528456005 cites W2138613133 @default.
• W2528456005 cites W2143637615 @default.
• W2528456005 cites W2146616243 @default.
• W2528456005 cites W2147602820 @default.
• W2528456005 cites W2149847837 @default.
• W2528456005 cites W2153076617 @default.
• W2528456005 cites W217121862 @default.
• W2528456005 cites W2189095778 @default.
• W2528456005 cites W2288637830 @default.
• W2528456005 cites W2313209805 @default.
• W2528456005 cites W2415900735 @default.
• W2528456005 cites W2518429713 @default.
• W2528456005 cites W3098263917 @default.
• W2528456005 cites W3098787376 @default.
• W2528456005 cites W3099363679 @default.
• W2528456005 cites W3099541074 @default.
• W2528456005 cites W3099902625 @default.
• W2528456005 cites W3101849089 @default.
• W2528456005 cites W3102323848 @default.
• W2528456005 cites W3105149662 @default.
• W2528456005 cites W3106412259 @default.
• W2528456005 cites W3125106793 @default.
• W2528456005 cites W3128285573 @default.
• W2528456005 cites W749094884 @default.
• W2528456005 hasPublicationYear "2016" @default.
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