Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Modelling heterogeneous dust particles. An application to cometary
  polarization   In this work, we introduce a comet dust model that incorporates multiple dust
morphologies along with inhomogeneous mixture of silicate minerals and
carbonaceous materials under power-law size distribution, to replicate the
standard polarization-phase curve observed in several comets in the narrow-band
continuum. Following the results from Rosetta/MIDAS and COSIMA, we create high
porosity Hierarchical Aggregates (HA) and low porosity (< 10$\%$) Solids in the
form of agglomerated debris. We also introduce a moderate porosity structure
with solids in the core, surrounded by fluffy aggregates called Fluffy Solids
(FS). We study the mixing combinations, (HA and Solids), (HA and FS) and (HA,
FS and Solids) for a range of power-law index n=2.0 to 3.0 for different sets
of mixing percentage of silicate minerals and carbonaceous materials.
Polarimetry of the short period comets 1P/Halley and 67P/Churyumov-Gerasimenko
match best with the polarisation resulting from the combination of HA and
Solids while the combinations (HA and FS) and (HA, FS and Solids) provide the
best fit results for the long period comets C/1995 O1 (Hale-Bopp) and C/1996 B2
(Hyakutake). The best fit model results also recreate the observed wavelength
dependence of polarization. Our dust model agree with the idea that the long
period comets may have high percentage of loose particles (HA and FS) compared
to those in the case of short period comets as the short period comets
experience more frequent and/or higher magnitude of weathering.

23
The categories of this paper are: solv-int
14
The categories of this paper are: math-ph
35
The categories of this paper are: mtrl-th
8
The categories of this paper are: hep-ex
15
The categories of this paper are: nucl-ex
16
The categories of this paper are: stat
2
The categories of this paper are: math
0
The categories of this paper are: hep-ph
9
The categories of this paper are: nlin
13
The categories of this paper are: quant-ph
5
The categories of this paper are: gr-qc
1
The categories of this paper are: cs
33
The categories of this paper are: plasm-ph
26
The categories of this paper are: bayes-an
19
The categories of this paper are: eess
27
The categories of this paper are: comp-gas