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

在过去的四年里，凯克10米望远镜对我们银河系动力中心周围的区域进行了近红外成像，对90颗恒星进行了精确的运动测量。观测到的恒星速度提供了对中心黑洞质量的精确测量。测量黑洞附近许多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。Drs。加州大学洛杉矶分校的安德里亚·盖兹和马克·莫里斯将获得银河系中心几个弧秒内恒星的散斑成像和自适应光学近红外光谱，以确定恒星的轨道。了解几颗恒星的轨道将限制黑洞在独特的射电波长源Sgr a *附近的可能存在和位置。这个奖项是由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.***