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
复制标题
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:
影响因子:
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通讯作者:
P. Wizinowich
中科院分区:
文献类型:
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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
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.
影响因子:
4.9
作者:
Charlot, S;Fall, SM
通讯作者:
Fall, SM
DOI:
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发表时间:
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