Originally Posted by
Sol88
Further, there seems to be some confusion, ????
One or the other?
Comet 67P outbursts and quiescent coma at 1.3 AU from the Sun: dust properties from Rosetta/VIRTIS-H observations
As usual some cherry-pick quoting from our friend Sol, the full sentences read:
Quote:
In addition, the measured large bolometric albedos (∼0.7) indicate bright grains in the ejecta, which could either be silicatic grains, implying the thermal degradation of the carbonaceous material, or icy grains. The 3 μm absorption band from water ice is not detected in the spectra acquired during the outbursts, whereas signatures of organic compounds near 3.4 μm are observed in emission. The H2O 2.7 μm and CO2 4.3 μm vibrational bands do not show any enhancement during the outbursts.
Note that this is about dust in an outburst, and not bright patches on the surface of the comet.
For those interested
here is the link to mnras (paywalled, pdf available)