U.S.-France Cooperative: 2Mass Studies of the Atomic Hydrogen and Infrared Properties of Galaxies

这项为期三年的美法天文学合作研究奖的获得者是马萨诸塞大学阿默斯特分校的Stephen E. Schneider和巴黎天文台的Chantal Balkowski。研究人员将使用南凯和阿雷西博射电望远镜进行联合观测。这些仪器的互补性将允许：(1)对星系中合并的恒星和气体重子含量进行新的测量；(2)寻找以古老的红色恒星群为主的富含气体的星系；(3)探测银河系以外宇宙深处的大尺度结构；(4)星系相对于大尺度结构运动的检验。该项目是2微米全天巡天（2MASS）的一部分，该巡天产生近红外波长的整个天空图像。2MASS巡天中微弱和低表面亮度的星系是这次合作的焦点。该项目利用了美国和法国研究人员的互补专业知识，结合了2MASS和南凯21cm无线电观测产生的数据。该奖项代表了美国方面向美国国家科学基金会和法国国家科学研究中心（CNRS）提出的联合提案。美国国家科学基金会将支付美国研究员和本科生的旅费和生活费。法国科学研究中心将支持法国研究人员访问美国。这项合作将促进对正常星系和低表面亮度星系中恒星形成机制的基本理解。

0089703SchneiderThis three-year award for U.S.-France cooperative research in astronomy involves Stephen E. Schneider of the University of Massachusetts at Amherst and Chantal Balkowski of the Observatoire de Paris. The investigators will conduct joint observations using the Nancay and Arecibo radiotelescopes. The complementarity of these instruments will allow for: (1) new measures of the combined stellar and gaseous baryonic content of galaxies; (2) searches for gas-rich galaxies dominated by old, red populations of stars; (3) detection of large-scale structures into deep regions of the universe beyond our Galaxy; and (4) examination of motions of galaxies relative to large-scale structure. The project is part of the 2-Micron All Sky Survey (2MASS) which generates images of the entire sky at near-infrared wavelengths. Faint and low surface brightness galaxies in the 2MASS survey are the foci of this collaboration. The project takes advantage of complementary expertise of the US and French investigators, combines data generated by the 2MASS and the 21 cm radio observations at Nancay.This award represents the US side of a joint proposal to the NSF and the French National Center for Scientific Research (CNRS). NSF will cover travel funds and living expenses for the US investigator and undergraduate student. CNRS will support the visits of French researchers to the United States. The collaboration will advance fundamental understanding of the mechanisms of star formation in normal galaxies and low surface brightness galaxies.