Multicolor Active Galactic Nuclei Monitoring

多色活动星系核监测

基本信息

  • 批准号:
    10304014
  • 负责人:
  • 金额:
    $ 23.73万
  • 依托单位:
  • 依托单位国家:
    日本
  • 项目类别:
    Grant-in-Aid for Scientific Research (A)
  • 财政年份:
    1998
  • 资助国家:
    日本
  • 起止时间:
    1998 至 2001
  • 项目状态:
    已结题

项目摘要

It is difficult to determine the cosmological parameters by the classical methods based on the optical-infrared observation of distant galaxies, because the effect of the cosmic expansion and the galaxy evolution is mixed and difficult to distinguish. We proposed a new method to measure the luminosity distance of remote galaxies, which is independent of and overcomes the galaxy evolution effect. The proposed method is as follows:At first, a lag from the optical variability to the infrared variability of an active galactic nucleous (AGN) is measured (the dust reverberation method). Then, the UV/optical absolute magnitude can be estimated from the measured lag because a luminous AGN have a large dust torus and therefore have a large lag. At last comparing the absolute and apparant magnitude of the AGN, we can measure the luminosity distance. In order to establish and apply the method, we prepared a 2 m telescope dedicated to monitoring AGNs at the Haleakala observatories at Maui island, and started the observation from fiscal 2000. The lags between the optical variability and infrared variability of NGC 4151 and some other nearby AGNs was measured accurately than ever from the pilot observation, therefore the method we proposed can be concluded promising. We are going to start the frequent monitor of lots of AGNs to be continued several years, and will construct the largest optical and infrared variability database of AGNs.1. A new galaxy evolution model was constructed with the recent observational results of galaxies, and determine the cosmological parameters using the classical methods (m-z, theta-z, number count) concerning with the evolution effect estimated by the new model.2. We argued that the extremely red objects found in SDF is dust enshrouded forming elliptical galaxies, and compared the observation with the theoretical galaxy formation processes.
由于宇宙膨胀和星系演化的影响是混合的,很难区分,因此基于远距离星系的光红外观测的经典方法很难确定宇宙学参数。提出了一种测量遥远星系光度距离的新方法,该方法不受星系演化效应的影响,并且克服了星系演化效应。提出的方法如下:首先,测量活动星系核(AGN)的光学变率到红外变率的滞后(尘埃混响法)。然后,紫外/光学绝对星等可以估计从测量的滞后,因为一个发光的活动星系核有一个大的尘埃环,因此有一个大的滞后。最后通过比较活动星系核的绝对星等和视星等,来测量活动星系核的光度距离。为了建立和应用该方法,我们准备了一个2米的望远镜,专门用于监测活动星系核在毛伊岛的哈雷阿卡拉天文台,并开始从2000财政年度的观测。通过对NGC 4151等活动星系核的初步观测,较精确地测量了其光学和红外光变之间的滞后,表明该方法是可行的。我们将开始对大量活动星系核进行连续几年的频繁监测,并将建立最大的活动星系核光学和红外变率数据库。利用星系的最新观测结果,构建了一个新的星系演化模型,并利用经典方法(m-z,theta-z,计数)确定了新模型估计的演化效应的宇宙学参数.我们认为,在SDF中发现的极端红色物体是尘埃笼罩形成椭圆星系,并与理论星系形成过程的观察进行了比较。

项目成果

期刊论文数量(21)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Chiba, M.: "New limits on a cosmological constant from statistics of gravitational lensing"Astrophysical Journal. v.510. 42-53 (1999)
Chiba, M.:“引力透镜统计对宇宙常数的新限制”《天体物理学杂志》。
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    0
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  • 通讯作者:
Minezaki, T.: "K-Band Galaxy Counts in the South Galactic Pole Region" Astrophysical Journal. v.494. 111-117 (1998)
Minezaki, T.:“南银河极地区的 K 波段星系计数”天体物理学杂志。
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    0
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Yahagi, H.: "N-Body Code with Adaptive Mesh Refinement"The Astrophysical Journal. v.558. 463-475 (2001)
Yahagi, H.:“具有自适应网格细化的 N 体代码”《天体物理学杂志》。
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    0
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Totani,T.: "Unavoidable Selection Effects in the Analysis of Faint Galaxies in the Hubble Deep Field : Probing the Cosmology and Merger History of Galaxies"Astrophysical Journal. v.540. 81-98 (2000)
Totani,T.:“哈勃深场微弱星系分析中不可避免的选择效应:探索宇宙学和星系合并历史”天体物理学杂志。
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  • 影响因子:
    0
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Suzuki,T.K.: "Primordial Lithium Abundance as a Stringent Constraint on the Baryonic Content of the Universe"Astrophysical Journal. v.540. 99-103 (2000)
铃木,T.K.:“原始锂丰度对宇宙重子含量的严格约束”天体物理学杂志。
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    0
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YOSHII Yuzuru其他文献

YOSHII Yuzuru的其他文献

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{{ truncateString('YOSHII Yuzuru', 18)}}的其他基金

Study of the Global Structure of Interstellar Gas Cycle in Galaxies
星系中星际气体循环的整体结构研究
  • 批准号:
    22253002
  • 财政年份:
    2010
  • 资助金额:
    $ 23.73万
  • 项目类别:
    Grant-in-Aid for Scientific Research (A)
Multicolor Active Galactic Nuclei Monitoring
多色活动星系核监测
  • 批准号:
    14253001
  • 财政年份:
    2002
  • 资助金额:
    $ 23.73万
  • 项目类别:
    Grant-in-Aid for Scientific Research (A)
Multicolor Active Galactic Nuclei Monitoring
多色活动星系核监测
  • 批准号:
    10041110
  • 财政年份:
    1998
  • 资助金额:
    $ 23.73万
  • 项目类别:
    Grant-in-Aid for Scientific Research (B).
Evolution of Galaxies and Observational Cosmology
星系的演化和观测宇宙学
  • 批准号:
    02640207
  • 财政年份:
    1990
  • 资助金额:
    $ 23.73万
  • 项目类别:
    Grant-in-Aid for General Scientific Research (C)

相似海外基金

The Time Variability and Duty Cycle of Active Galactic Nuclei During Quenching
淬火过程中活动星系核的时间变化和占空比
  • 批准号:
    2307375
  • 财政年份:
    2023
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    $ 23.73万
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WoU-MMA: Multi-messenger Signatures of Ion Acceleration in Active Galactic Nuclei
WoU-MMA:活动星系核中离子加速的多信使特征
  • 批准号:
    2308021
  • 财政年份:
    2023
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    $ 23.73万
  • 项目类别:
    Standard Grant
Echo Mapping of Black Hole Accretion Flows in Active Galactic Nuclei
活动星系核中黑洞吸积流的回波映射
  • 批准号:
    2899330
  • 财政年份:
    2023
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    $ 23.73万
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    Studentship
high-energy gamma ray emission from active galactic nuclei
活动星系核发射的高能伽马射线
  • 批准号:
    2872989
  • 财政年份:
    2023
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Formation and Evolution of Supermassive Black Holes Probed by High-Redshift Active Galactic Nuclei
高红移活动星系核探测超大质量黑洞的形成和演化
  • 批准号:
    23KJ0589
  • 财政年份:
    2023
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    Grant-in-Aid for JSPS Fellows
Localization of very high energy gamma-ray emission regions and study of emission mechanisms in active galactic nuclei
极高能伽马射线发射区域的定位及活动星系核发射机制的研究
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    22K03663
  • 财政年份:
    2022
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    $ 23.73万
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Identifying Spatially Offset Active Galactic Nuclei from the Very Large Array Sky Survey: Tracing the Growth of Massive Black Holes in Galaxy Mergers
从甚大阵列巡天中识别空间偏移的活动星系核:追踪星系合并中大质量黑洞的增长
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    2206184
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    2022
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    $ 23.73万
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Understanding physics in the vicinity of super massive black holes by centimeter and millimeter observations of nearby active galactic nuclei
通过对附近活动星系核的厘米和毫米观测来了解超大质量黑洞附近的物理现象
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    22K14073
  • 财政年份:
    2022
  • 资助金额:
    $ 23.73万
  • 项目类别:
    Grant-in-Aid for Early-Career Scientists
Varstrometry for Off-nucleus and Dual (sub)Kpc Active Galactic Nuclei
核外和双(子)Kpc 活动星系核的变化测量
  • 批准号:
    2108162
  • 财政年份:
    2021
  • 资助金额:
    $ 23.73万
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Active Galactic Nuclei Feedback in Galaxies and Clusters of Galaxies
星系和星系团中的活跃星系核反馈
  • 批准号:
    RGPIN-2016-06030
  • 财政年份:
    2021
  • 资助金额:
    $ 23.73万
  • 项目类别:
    Discovery Grants Program - Individual
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