Making Hay with ALFALFA: Optical Properties of an HI-selected Galaxy Sample

用苜蓿干草:HI 选择的星系样本的光学特性

基本信息

  • 批准号:
    0823801
  • 负责人:
  • 金额:
    $ 46.25万
  • 依托单位:
  • 依托单位国家:
    美国
  • 项目类别:
    Standard Grant
  • 财政年份:
    2008
  • 资助国家:
    美国
  • 起止时间:
    2008-02-01 至 2011-07-31
  • 项目状态:
    已结题

项目摘要

AST-0708230SalzerThe Arecibo Legacy Fast ALFA (ALFALFA) project at the 305m Arecibo radio telescope in Puerto Rico is a cutting-edge neutral hydrogen (HI) survey using the new seven-beam detector, the Arecibo L-band Feed Array (ALFA), which will map approximately 17% of the entire sky. The current project will obtain images in ionized hydrogen (H-alpha) light, as well as follow-up spectroscopy, to exploit the unprecedented samples of gas-rich dwarf galaxies and low-surface-brightness galaxies which will be found by the ALFALFA survey. These samples are expected to be significantly more complete and less biased than those produced by more traditional surveys. This research will determine the star formation rate density in the local universe, and obtain accurate nebular abundances in order to investigate how chemical evolution proceeds in galaxies of different types. The spectroscopic study includes a search for possibly young galaxies with no old stellar population.The data produced by ALFALFA and the follow-up optical observations will be made available to all members of the astronomical community on a short timescale, thus maximizing the potential scientific return. The project will also serve as the centerpiece of the Principal Investigator's active and successful program of involving students, particularly from under-represented groups, in meaningful research.
位于波多黎各的305米阿雷西博射电望远镜的阿雷西博传统快速阿尔法(紫花苜蓿)项目是一项尖端的中性氢(HI)探测,使用了新的七光束探测器--阿雷西博L波段馈电阵列(ALFA),它将绘制大约17%的整个天空的地图。目前的项目将获得电离氢(H-α)光的图像,以及后续的光谱,以利用紫花苜蓿调查将发现的前所未有的富含气体的矮小星系和低表面亮度星系的样本。预计这些样本将比更传统的调查产生的样本更完整,偏差更小。这项研究将确定局部宇宙中的恒星形成速率密度,并获得准确的星云丰度,以便研究不同类型星系中的化学演化过程。光谱研究包括寻找可能没有古老恒星群的年轻星系。紫花苜蓿产生的数据和后续的光学观测将在短时间内提供给天文学社区的所有成员,从而使潜在的科学回报最大化。该项目还将作为首席调查员积极和成功的方案的核心,让学生,特别是来自代表不足的群体的学生,参与有意义的研究。

项目成果

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John Salzer其他文献

John Salzer的其他文献

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{{ truncateString('John Salzer', 18)}}的其他基金

Making Hay with ALFALFA: Optical Properties of an HI-selected Galaxy Sample
用苜蓿干草:HI 选择的星系样本的光学特性
  • 批准号:
    0708230
  • 财政年份:
    2007
  • 资助金额:
    $ 46.25万
  • 项目类别:
    Standard Grant
KISS - KPNO International Spectroscopic Survey
KISS - KPNO 国际光谱调查
  • 批准号:
    0307766
  • 财政年份:
    2003
  • 资助金额:
    $ 46.25万
  • 项目类别:
    Continuing Grant
KISS - KPNO International Spectroscopic Survey
KISS - KPNO 国际光谱调查
  • 批准号:
    0071114
  • 财政年份:
    2000
  • 资助金额:
    $ 46.25万
  • 项目类别:
    Continuing Grant
Presidential Faculty Fellows Award - Observational Cosmology and Active Star-Forming Galaxies
总统教员奖 - 观测宇宙学和活跃恒星形成星系
  • 批准号:
    9553020
  • 财政年份:
    1995
  • 资助金额:
    $ 46.25万
  • 项目类别:
    Continuing Grant

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