Galactic History- Old Stellar Populations in Edge-on Disk Galaxies

银河历史-边缘盘星系中的古老恒星群

基本信息

  • 批准号:
    9624542
  • 负责人:
  • 金额:
    $ 53.24万
  • 依托单位:
  • 依托单位国家:
    美国
  • 项目类别:
    Continuing Grant
  • 财政年份:
    1996
  • 资助国家:
    美国
  • 起止时间:
    1996-08-01 至 2003-07-31
  • 项目状态:
    已结题

项目摘要

9624542 Morrison The ability to study old stellar populations in galaxies, the results of which may be used to trace the formation and evolution of galaxies, has benefited in several ways from the advent of large-format Charge-Coupled-Devices (CCDs) and increased computing power. A major advance has been the development of techniques of using deep CCD imaging of galaxies, which allows one to study the old stellar populations of nearby galaxies in unprecedented detail. The observations to be carried out will reach more than 2 magnitudes fainter than previous observations. The results of the research will serve to delineate the older stellar populations of a representative sample of nearby disk galaxies, using recently developed techniques. A systematic investigation of the properties of 10 nearby edge-on disk galaxies with Hubble types ranging from Sc though Sa to S0 will be carried out. Of particular interest in this work are the properties of thick disks and stellar halos of these galaxies, when they exist. The study of the thick disks observed in the sample will able one to test the currently popular models of thick disk galaxy formation by satellite accretion. If the models predict successfully the thick disk properties of this sample, there is the possibility of using thick disks as tracers of the accretion history of galaxies. The characterization of thick disks and halos in this sample will allow us to test for the first time whether the Milky Way's old stellar populations are typical of nearby disk galaxies. Most of the observations will be taken on Case Western Reserve University's (CWRU) Burrell Schmidt telescope at Kitt Peak Natal Observatory (KPNO), to which CWRU has special access. An improved CCD system for the Schmidt, with a factor of 5 improvement in quantum efficiency, will be purchased. This upgrade of the CCD system will enable surface photometry observations in the blue region of the spectrum, and thus provide color (and hence a ge and metallicity) information on the thick disk and halo stellar populations. Teaching development activities will include involvement of undergraduate students in research and in course development of the "Introduction to Astronomy for Majors" course. This will closely tie what is taught to current research, using a thematic approach. Two major areas of current astronomical research, how the solar system was formed and the determination of the value of cosmic distance scale problem, will be used as recurring themes in the two-semester course. Other teaching-related activities will include several innovative ways of improving teaching, organized through CWRU's new teaching center (including active learning techniques and a strong use of the World Wide Web). A program to allow undergraduates to accompany the PI on observing trips to KPNO will be carried out. ***
9624542莫里森 研究星系中古老恒星群的能力,其结果可用于追踪星系的形成和演化,这在几个方面得益于大尺寸电荷耦合器件(CCD)的出现和计算能力的提高。 一个主要的进展是发展了使用深CCD成像的星系技术,这使得人们能够以前所未有的细节研究附近星系的旧恒星种群。即将进行的观测将比以前的观测暗2等以上。 研究结果将有助于利用最近开发的技术描绘附近盘状星系代表性样本的较老恒星群。 系统地研究了10个邻近的边缘盘星系的性质,它们的哈勃类型从Sc到Sa到S0不等。 在这项工作中特别感兴趣的是这些星系的厚盘和恒星晕的性质,当它们存在时。 对样品中观察到的厚盘的研究将能够测试目前流行的厚盘星系通过卫星吸积形成的模型。如果模型成功地预测厚盘的性质,这个样本,有可能使用厚盘作为示踪剂的吸积历史的星系。 这个样本中厚盘和晕的特征将使我们能够首次测试银河系的古老恒星群是否是附近盘星系的典型。 大部分观测将在凯斯西储大学(CWRU)位于基特峰纳塔尔天文台(KPNO)的伯勒尔施密特望远镜上进行,CWRU拥有特别访问权。 将为施密特购买一个改进的CCD系统,量子效率提高5倍。 CCD系统的这一升级将使在光谱的蓝色区域进行表面测光观测成为可能,从而提供关于厚盘和晕恒星种群的颜色(以及因此的ge和金属丰度)信息。 教学发展活动将包括本科生参与研究和“专业天文学导论”课程的课程开发。 这将紧密结合什么是教当前的研究,使用主题的方法。 当前天文学研究的两个主要领域,太阳系是如何形成的,以及宇宙距离尺度问题的值的确定,将被用作两个学期课程中反复出现的主题。其他与教学有关的活动将包括通过CWRU的新教学中心组织的几种改进教学的创新方法(包括积极的学习技巧和对万维网的大力利用)。 将实施一项允许本科生陪同PI前往KPNO观察的计划。 ***

项目成果

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Heather Morrison其他文献

An evaluation of antecedent exercise on behavior maintained by automatic reinforcement using a three-component multiple schedule.
使用三部分多重计划对通过自动强化维持的行为进行先前练习的评估。
Argatroban and ultrasound-facilitated thrombolysis with alteplase in a patient with bilateral pulmonary embolism and history of heparin-induced thrombocytopenia: A case report
阿加曲班联合阿替普酶超声辅助溶栓治疗双侧肺栓塞且有肝素诱导血小板减少病史的患者:病例报告
Multimodal Analgesia’s Impact on Opioid Use and Adverse Drug Effects in a Multihospital Health System
多模式镇痛对多医院卫生系统中阿片类药物使用和药物不良反应的影响
  • DOI:
  • 发表时间:
    2022
  • 期刊:
  • 影响因子:
    0.7
  • 作者:
    Allison C. Cone;Michael Sanchez;Heather Morrison;Adam Fier
  • 通讯作者:
    Adam Fier

Heather Morrison的其他文献

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{{ truncateString('Heather Morrison', 18)}}的其他基金

Collaborative Research: Towards the Edge of the Milky Way. The First Contiguous Spectroscopic Survey of the True Outer Halo.
合作研究:走向银河系边缘。
  • 批准号:
    1211989
  • 财政年份:
    2012
  • 资助金额:
    $ 53.24万
  • 项目类别:
    Standard Grant
Mapping the Milky Way Outer Halo with SEGUE and BOSS
使用 SEGUE 和 BOSS 绘制银河系外光环
  • 批准号:
    1009886
  • 财政年份:
    2010
  • 资助金额:
    $ 53.24万
  • 项目类别:
    Standard Grant
The Four-Dimensional Galaxy
四维星系
  • 批准号:
    0607518
  • 财政年份:
    2006
  • 资助金额:
    $ 53.24万
  • 项目类别:
    Continuing Grant
Collaborative Research: The Structure and Origin of the Galactic Halo
合作研究:银河晕的结构和起源
  • 批准号:
    0098435
  • 财政年份:
    2001
  • 资助金额:
    $ 53.24万
  • 项目类别:
    Continuing Grant
Collaborative Project: The Structure and Origin of the Galactic Halo
合作项目:银河晕的结构和起源
  • 批准号:
    9619490
  • 财政年份:
    1997
  • 资助金额:
    $ 53.24万
  • 项目类别:
    Standard Grant

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