摘要：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. Key words Sublimation dust interplanetary medium debris disks celestial mechanics.
关键词：Sublimation ;dust ;interplanetary medium ;debris disks ;celestial mechanics
