A Diffraction-Limited View of the Galaxy's Central Parsec

AST 9988397 Ghez在过去的四年里，用凯克10米望远镜对银河系动力中心周围的区域进行了近红外成像，获得了90颗恒星的精确自行测量结果。 观测到的恒星速度提供了中心黑洞质量的精确测量。 测量黑洞附近一些恒星的轨道加速度的能力为探索星系核中黑洞的环境开辟了新的可能性。位于洛杉矶的加州大学的Andrea Ghez和Mark Morris博士将获得银河系中心几角秒内恒星的散斑成像和自适应光学近红外光谱，以确定恒星轨道。 知道几颗恒星的轨道将限制唯一无线电波长源Sgr A* 附近黑洞的可能存在和位置。 这个奖项是通过银河天文学计划颁发的。

AST 9988397GhezNear-infrared imaging of the region immediately surrounding the dynamical center of our Galaxy with the Keck 10-meter telescope over the last four years has yielded precise proper motion measurements of 90 stars. The observed stellar velocities provide an accurate measure of the mass of a central black hole. The ability to measure the orbital accelerations of a number of stars near the black hole opens a new range of possibilities for exploring the environment of a black hole in a galactic nucleus. Drs. Andrea Ghez and Mark Morris of the University of California at Los Angeles will obtain speckle imaging and adaptive optics near-infrared spectra of stars within a few arcsec of the Galactic Center in order to determine stellar orbits. Knowing the orbits of several stars will constrain the possible presence and position of a black hole near the unique radio wavelength source Sgr A*. This award is made through the Galactic Astronomy Program.***