e-Science Applications in Astronomy:Astrometry Using a Virtual Observatory

摘要

We used Virtual Observatory (VO) tools to calculate proper motions in the bipolar outflowobject, HH 896. One good example of an e-science application is the VO. The primary goal of theVO is to collect observed data from many telescopes and instruments and to construct a softwaresystem for managing heterogeneous data. The other is to allow transparency and to provide theability to access data distributed throughout the world. Astrometry-oriented projects are currentlydeveloped and have been greatly enriched because of the prototype of a VO system. Astrometry isessential to calculate positional variations by using multiple observations of the same object. Weused an Aladin sky atlas system of the Strasbourg astronomical Data Center (CDS) for retrievingdata. The Aladin sky atlas system is the best candidate of a VO architecture system and can makesearches for various kinds of data available. The bipolar outflow objects in star-forming regionsare useful targets for astrometric studies. We obtained two images of HH 896 and calculated theproper motions of the bow-shocks observed in the bipolar outflow. Based on our observation andthe proper motion calculation, we confirmed the energy source of the bipolar outflow of HH 896.