  This study investigates the origin of interplanetary dust particles (IDPs)
through the optical properties, albedo and spectral gradient, of zodiacal
light. The optical properties were compared with those of potential parent
bodies in the solar system, which include D-type (as analogue of cometary
nuclei), C-type, S-type, X-type, and B-type asteroids. We applied Bayesian
inference on the mixture model made from the distribution of these sources, and
found that >90% of the interplanetary dust particles originate from comets (or
its spectral analogues, D-type asteroids). Although some classes of asteroids
(C-type and X-type) may make a moderate contribution, ordinary chondrite-like
particles from S-type asteroids occupy a negligible fraction of the
interplanetary dust cloud complex. The overall optical properties of the
zodiacal light were similar to those of chondritic porous IDPs, supporting the
dominance of cometary particles in zodiacal cloud.
