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Development of the Hubble Sequence of Galaxies at High Redshift

高红移星系哈勃序列的发展

基本信息

批准号：
14540234
负责人：
YAMADA Toru
金额：
$ 2.11万
依托单位：
National Astronomical Observatory of Japan
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2002
资助国家：
日本
起止时间：
2002 至 2004
项目状态：
已结题

项目摘要

In order to study the formation of galaxies and the origins of the Hubble sequence, (i) we investigated the evolution of the color and magnitude distribution of the galaxies at redshift larger than one by the deep and wide-field optical and near-infrared imaging observation with the Subaru telescope, and (ii) we also conducted the study of large extended emission-line nebulae at z=3-5 which are likely to be the massive galaxies in their forming phase by the deep narrow-band imaging also using the Subaru Telescope.Based on the deep near-infrared data of the Hubble Deep Field, we revealed the stellar-mass dependence of the star-formation history of the galaxies and showed that the bimodal color distribution is clearly seen at intermediate and high redshift galaxies and the low-mass objects have relatively homogeneous color which evolves systematically along the redshift. Using the wide-field multi-color data obtained at the Subaru XMM/Newton Deep Survey field, we also studied the color and morphology distribution of high-redshift galaxies to investigate when and how the progenitors of the local Hubble sequence galaxies appear in the history of structure formation. In pararell, we are also conducting the further wide-area survey to compare with the results recently obtained by the Spitzer space telescopes. On the other hand, we proceeded the deep and wide-field narrow-band imaging survey with the Subaru telescope to delineate the regions of massive galaxy formation. We detected a significant number of the giant extended emission-line nebulae which are likely to be the massive forming galaxies.These results are reported in the four journal papers as well as a number of domestic and international conferences and workshop. We have submitted two more papers and are preparing three further more papers to be submitted soon.

为了研究星系的形成和哈勃序列的起源，（i）利用斯巴鲁望远镜的深宽视场光学和近红外成像观测，研究了红移大于1的星系的颜色和星等分布的演化，（ii）我们还对z=3-5的大扩展发射线星云进行了研究，这些星云很可能是深窄-波段成像也使用斯巴鲁望远镜。基于哈勃深场的深层近红外数据，我们揭示了星系恒星形成历史的恒星质量依赖性，并表明双峰色分布在中高红移星系和低红移星系中清晰可见。质量大的物体具有相对均匀的颜色，其沿着红移系统地演化。利用斯巴鲁XMM/Newton深空巡天观测场获得的宽视场多色数据，我们还研究了高红移星系的颜色和形态分布，以探讨局域哈勃序列星系的祖先在结构形成历史中何时以及如何出现。与此同时，我们还在进行进一步的广域观测，以与斯皮策太空望远镜最近获得的结果进行比较。另一方面，我们用斯巴鲁望远镜进行了深视场和宽视场的窄带成像巡天，以描绘大质量星系形成的区域。我们探测到了相当数量的巨大扩展发射线星云，这些星云很可能是大质量的形成星系，这些结果在四篇期刊论文以及一些国内外会议和研讨会上报道。我们已经提交了另外两份文件，并正在准备另外三份文件，不久将提交。