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Tisserand invariant

Figure 3. A search for correlations in the observations of emtted cometary dust by dust albedo, silicate feature ampltude/continuum ratio, dust color temperature, Qdust, and Tisserand invariant of the parent comet, a) Comparison of the dust temperature and albedo (not shown is a correlation of the dust albedo and silicate feature strength, which demonstrates a similarly strong correlation); b) of the dust production rate and the temperature of the dust; and c) of the strength of the silicate feature and the Tisserand. There are clear trends and distinct groups by dynamical class - the LP comets produce the most dust with the hottest color temperature, highest albedo, and largest silicate feature. The New and Short Period comets produce little dust and what they do produce is cold, low albedo, and without much silicate feature. The Halley comets are between the two extremes.

Table 2.

Cometary dust size distributions well observed to date in the mid-IR.

Table 2.

Cometary dust size distributions well observed to date in the mid-IR.

Proper Name

Tperi

q

e

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