Merging Galaxies in GOODS-S: First Extragalactic Results from Keck Laser Adaptive Optics

Merging Galaxies in GOODS-S: First Extragalactic Results from Keck Laser Adaptive Optics
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GOODS-S 中的合并星系:Keck 激光自适应光学器件的第一个河外结果

DOI:
10.1086/430830
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发表时间:
2005
期刊:
The Astrophysical Journal Letters
影响因子:
--
通讯作者:
P. Wizinowich
P. Wizinowich
中科院分区:
--
文献类型:
--
作者:
J. Melbourne;S. Wright;M. Barczys;A. Bouchez;J. Chin;M. V. van Dam;S. Hartman;E. Johansson;D. Koo;R. Lafon;J. Larkin;D. Le Mignant;J. Lotz;C. Max;D. Pennington;P. Stomski;D. Summers;P. Wizinowich

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自适应光学国库调查中心的目标是将联合收割机哈勃太空望远镜(HST)的光学图像与凯克自适应光学(AO)的近红外(NIR)数据相结合,以研究遥远的星系,活动星系核和超新星。我们最近取得了一个重要的新的里程碑,通过确保第一凯克激光制导星星AO图像的微弱星系。六个星系的红移范围从0.3到1.0的目标是在一个指向GOODS-S领域。两个是钱德拉深场南源,XID-56和XID-536,具有复杂的形态,暗示最近的合并活动。在光学HST图像中证实了近红外AO图像(FWHM ~0.″1)中看到的亚结构,包括XID-56中的多个紧结和XID-536中的双核。这些结构在最佳可见限(~0.″5 FWHM)的近红外图像中是无法分辨的。子结构的恒星人口合成模型表明,XID-56是一个富含气体的合并,最近爆发的星星形成和大量的尘埃。XID-536似乎是两个演化恒星群的合并。
The Center for Adaptive Optics Treasury Survey aims to combine deep Hubble Space Telescope (HST) images in the optical with deep Keck adaptive optics (AO) data in the near-infrared (NIR) to study distant galaxies, active galactic nuclei, and supernovae. We recently achieved an important new milestone by securing the first Keck laser guide star AO image of faint galaxies. Six galaxies with redshifts ranging from 0.3 to 1.0 were targeted in one pointing in the GOODS-S field. Two are Chandra Deep Field-South sources, XID-56 and XID-536, with complex morphologies suggestive of recent merger activity. Substructures seen in the NIR AO image (FWHM ~0.″1), including multiple tight knots in XID-56 and a double nucleus in XID-536, are confirmed in the optical HST images. These structures are unresolved in the best seeing-limited (~0.″5 FWHM) NIR images. Stellar population synthesis models of the substructures indicate that XID-56 is a gas-rich merger with a recent burst of star formation and significant amounts of dust. XID-536 appears to be a merger of two evolved stellar populations.
DOI: 10.1086/309250
发表时间: 2000-08-20
影响因子: 4.9
作者:
Charlot, S;Fall, SM
通讯作者: Fall, SM
C.A.诺曼:《天体物理学杂志》。
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