许多小行星吸积对单个白矮星的污染
Pollution of single white dwarfs by accretion of many small asteroids
摘要：
从太阳系的小行星带外推，我们提出，外部污染的白矮星没有红外过量可能会经历连续的气相物质，最终是来自多个小行星的潮汐破坏吸积。如果这种情况是正确的，那么对金属污染的白矮星的观测可能会导致确定太阳系外小行星系综的大量元素组成。
英文摘要：
Extrapolating from the solar system's asteroid belt, we propose that externally-contaminated white dwarfs without an infrared excess may be experiencing continuous accretion of gas-phase material that ultimately is derived from the tidal destruction of multiple small asteroids. If this scenario is correct, then observations of metal-polluted white dwarfs may lead to determining the bulk elemental compositions of ensembles of extrasolar minor planets.
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