演講資訊

摘要：

Asteroids are believed to have the so-called "rubble-pile" structure (i.e., gravitationally bounded aggregations) and several evidences point to a loose interior structure for asteroids, including (a) bulk density smaller than that of composition materials, (b) asteroid families, (c) boulders on asteroid surface, and (d) the 2-hr spin-rate limit. However, the rubble-pile structure has been challenged recently by the discovery of super-fast rotators (SFRs), a group of asteroids survive under a spinning of < 2 hr that suppose to destroy them by exceedingly large centrifugal force. In order to understand SFRs itself and asteroid interior structure, I used wide-field telescopes (e.g., PTF, ZTF, PS1, and Subaru/HSC) to collect numerous asteroid light curve to find and study SFRs and try to pin down the spin-rate limits for different asteroid groups, like Hildas and Jupiter Trojans. My research involves big data analysis, machine learning and AI for period reliability determination, and an innovative method to discovery asteroids.