Sun Block for the Big Dog
An international team of astronomers, including researchers from the Max Planck Institute for Radio Astronomy and from the University of Cologne, discovered two titanium oxides, TiO and TiO2, at radio wavelengths using telescope arrays in the USA and in France.
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“Geologist [I'm Climate Change]”
Since: Mar 07
#1 Mar 27, 2013
This is an interesting result when the spectrum of VY CMa is considered along with the results.
This star is listed via its spectrum as a carbon star (C) type indicating that the photosphere is now rich in Carbon which has blocked out TiO2 absorbtion.
The fact that TiO2 & TiO are found in the nebula indicates that the star when it produced the nebula was originally type M.
This result appears to show that the star is evolving from M type to C type. For the record C type stars appear in large part to be highly evolved He burning AGB stars and begin C type life as S or late spectral type C types and evolve to blue as the star ages and emits more dust.
The result for most C type stars is a white dwarf. Some may be massive enough to begin C burning immediately after a C type spectrum appears and become blue giant BC type stars.
A supernova result for this star is unlikely, despite it being bigger than the average Mira star.
Have a nice day: Ag
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