Re-post from MinCup past:
The non-detection of #perovskite in non-stars shows that it's there.
Cool red dwarf stars have deep absorption bands from TIO gas in their atmospheres. In yet cooler brown dwarfs those bands have disappeared: opaque perovsite dust has condensed, making the titanium invisible.
Spectra from Kesseli et al. (2017), images from Gabicca, LEAP group.
The non-detection of #perovskite in non-stars shows that it's there.
Cool red dwarf stars have deep absorption bands from TIO gas in their atmospheres. In yet cooler brown dwarfs those bands have disappeared: opaque perovsite dust has condensed, making the titanium invisible.
Spectra from Kesseli et al. (2017), images from Gabicca, LEAP group.
#MinCup24 #Astronomy #RedDwarf #BrownDwarf #L_Dwarf
Bill Minarik