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

银河系中央秒差距的衍射极限视图

• 批准号: 9988397
• 负责人: Andrea Ghez
• 金额: $ 29.4万
• 依托单位: University of California-Los Angeles
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2000
• 资助国家: 美国
• 起止时间: 2000-07-01 至 2004-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9988397&HistoricalAwards=false
• 关键词: Diffraction; Limited; View; Galaxy; Central

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.***

在过去的四年里，用凯克10米望远镜对我们银河系动力学中心周围的区域进行了近红外成像，得到了90颗恒星的精确自行测量结果。观测到的恒星速度为中心黑洞的质量提供了准确的测量。测量黑洞附近多颗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一系列新的可能性。加州大学洛杉矶分校的安德里亚·盖兹和马克·莫里斯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，以确定恒星的轨道。知道几颗恒星的轨道将限制在独特的射电波长源SgrA*附近可能存在的黑洞和黑洞的位置。该奖项是通过银河天文计划颁发的。*