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arXiv 1202.1887astro-ph.CO
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MODS中静止星系的总中心光度比作为大小演化的指示

Total to central luminosity ratios of quiescent galaxies in MODS as an indicator of size evolution

Mohammad Akhlaghi, Takashi Ichikawa, Masaru Kajisawa

摘要:

利用MOIRCS深巡天GOODS-N极深区域的Subaru影像和HST/ACS影像,我们在一个静止坐标系中测量了z<3.5的大质量(M>10^{10.5} M_{Sun})星系在固定半径处的外中心区域的光度比(LR),作为研究星系大小演化问题的一种新方法。我们没有观察到中位LR的任何变化。如果发生了显著的尺寸增长,那么外部与中心的光度比将随着红移的减小而相应地增加。

英文摘要:

Using the very deep Subaru images of the GOODS-N region, from the MOIRCS Deep Survey and images from the HST/ACS, we have measured the Luminosity Ratio (LR) of the outer to the central regions of massive (M>10^{10.5}M_{Sun}) galaxies at fixed radii in a single rest-frame for z<3.5 as a new approach to the problem of size evolution. We didn't observe any evolution in the median LR. Had a significant size growth occurred, the outer to central luminosity ratios would have demonstrated a corresponding increase with a decrease in redshift.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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