出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：We present recent results of astrometic observations of H2O maser sources in nearby molecular clouds with VERA. The main goal of our study is to measure the absolute proper motions and distances to nearby molecular clouds within 1 kpc from the Sun to reveal their 3-dimensional structures. So far, we have successfully measured the annual parallaxes of Orion KL in Orion, IRAS16293-2422 in Ophiuchus, NGC1333 SVS13 and L1448C in Perseus, and L1204G in Cepheus. Our results demonstrate the high capability of astrometry with VERA, which can provide most accurate distances to nearby molecular clouds. This will also enable us to reveal the overall structure of the local arm of our Galaxy as well as the Gould Belt.
