Journal
EARTH PLANETS AND SPACE
Volume 63, Issue 10, Pages 1067-1075Publisher
SPRINGER HEIDELBERG
DOI: 10.5047/eps.2011.03.012
Keywords
Sublimation; dust; interplanetary medium; debris disks; celestial mechanics
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Funding
- CPS
- JSPS
- MEXT Japan
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Dust particles in orbit around a star drift toward the central star by the Poynting-Robertson effect and pile up by sublimation. We analytically derive the pile-up magnitude, adopting a simple model for optical cross sections. As a result, we find that the sublimation temperature of drifting dust particles plays the most important role in the pile-up rather than their optical property does. Dust particles with high sublimation temperature form a significant dust ring, which could be found in the vicinity of the sun through in-situ spacecraft measurements. While the existence of such a ring in a debris disk could not be identified in the spectral energy distribution (SED), the size of a dust-free zone shapes the SED. Since we analytically obtain the location and temperature of sublimation, these analytical formulae are useful to find such sublimation evidences.
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