Compaction in Action: Blue, Green, and Red Nuggets at Redshift Zero

该项目将利用现有的调查数据沿着新的观测结果，研究致密星系演化的不同阶段。当气体云碰撞时，它们被认为会产生紧凑的蓝色星系（称为“蓝块”），这些星系正在经历快速的星星形成。随着蓝块继续吸积气体，它们的星星形成将减少，留下紧凑的红色星系（称为“红块”），最终通过吸积卫星星系形成椭圆星系。这个项目将研究附近的蓝块、红块和过渡中的块（所谓的“绿色块”）的数量。该项目将能够观察金块演化的所有阶段，并更好地理解星星的形成和碰撞气流如何产生这些物体并影响它们的结构。该项目还将向天文学界提供数据，并提供工具，使数据可用于教育。该项目将支持为期两周的计算天文物理靴子营的本科生和学士后谁可能没有资源参与整个夏天的研究。该项目将执行一个系统的研究蓝色，红色和绿色金块在z=0 RESOLVE（本地卷的解析光谱）调查。这项研究将着眼于理解蓝块如何以及何时熄灭，碰撞流压缩是否仍然发生在红移为零，以及当蓝块通过绿色再到红色时，蓝块在结构上如何演变。该项目将使用RESOLVE的环境度量、多波长光度测定、光谱学和21厘米高氢气体观测。这些数据将得到其他观测数据的补充，以寻找碰撞流，合并，潮汐剥离和磁盘重建的运动学特征。该项目将通过创建一个新的数据科学门户网站来扩展RESOLVE可搜索在线数据库的实用性，该门户网站提供计算方法教程，示例数据分析项目和建议的教程序列。该项目将举办为期两周的计算天文物理学靴子营，每年将为五名本科生和学士后学生提供服务。该奖项反映了NSF的法定使命，并被认为值得通过使用基金会的智力价值和更广泛的影响审查标准进行评估来支持。

This project will use existing survey data along with new observations to study compact galaxies across different stages of their evolution. As gas clouds collide, they are thought to produce compact blue galaxies (called "blue nuggets") that are undergoing rapid star formation. As the blue nuggets continue to accrete gas, their star formation will decrease, leaving behind compact red galaxies (called "red nuggets") that eventually form elliptical galaxies through accretion of satellite galaxies. This project will study the nearby population of blue nuggets, red nuggets, and nuggets in transition (so-called "green nuggets"). The project will be able to look at all phases of nugget evolution and better understand how star formation and colliding streams of gas produce these objects and influence their structure. The project will also make the data available for the astronomical community and provide tools so that the data can be used in education. The project will support a two-week Computational Astronomy & Physics Boot Camp for undergraduates and post-baccalaureates who may not have the resources to participate in research over the entire summer.This project will perform a systematic study of blue, red, and green nuggets in the z=0 RESOLVE (REsolved Spectroscopy Of a Local VolumE) survey. The research will look at understanding how and when blue nuggets quench, whether colliding-stream compaction still occurs at redshift zero, and how nuggets evolve structurally as the pass from blue through green and on to red. The project will use RESOLVE's environment metrics, multi-wavelength photometry, optical spectroscopy, and 21 cm HI gas observations. This data will be supplemented by data from other observations to look for kinematic signatures of colliding streams, mergers, tidal stripping, and disk rebuilding. The project will expand the utility of RESOLVE's searchable online database by creating a new Data Science Portal providing computational methods tutorials, example data analysis projects, and suggested tutorial sequences. The project will conduct a two-week Computational Astronomy & Physics Boot Camp, which will serve five undergraduate and post-baccalaureate students per year.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.