A Deep K-Band Photometric Survey of Merger Remnants
A Deep K-Band Photometric Survey of Merger Remnants
复制标题
合并残余物的深度 K 波段光度测量
DOI：
10.1086/425049
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发表时间：
2004
期刊：
影响因子：
--
通讯作者：
R. Joseph
中科院分区：
文献类型：
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作者：
Barry Rothberg;R. Joseph
我们目前的K波段测光的51个候选合并残余物，以评估是否螺旋螺旋合并可以产生真正的椭圆星系的可行性。使用de Vaucouleurs r1/4和Sérsic r1/n拟合定律，发现样本中大多数星系的恒星成分都经历了剧烈的弛豫。然而，样品显示出不完全相混合的证据。分析还表明，在近三分之一的合并残留物的表面亮度轮廓中存在“多余的光”。间接证据表明，这是由于气体耗散坍缩引起的星爆效应。星系的积分光也表明合并可以形成L* 椭圆星系，与早期的红外研究相反。等照度线的形状和相关的结构参数进行了讨论，包括70%的样品显示盘状等照度线的证据。所提供的数据和结果是一个更大的光度和光谱运动的一部分，以彻底调查当地宇宙中的大样本合并。
We present K-band photometry for 51 candidate merger remnants to assess the viability of whether spiral-spiral mergers can produce bona fide elliptical galaxies. Using both the de Vaucouleurs r1/4 and Sérsic r1/n fitting laws, it is found that the stellar component in a majority of the galaxies in the sample has undergone violent relaxation. However, the sample shows evidence for incomplete phase mixing. The analysis also indicates the presence of "excess light" in the surface brightness profiles of nearly one-third of the merger remnants. Circumstantial evidence suggests that this is due to the effects of a starburst induced by the dissipative collapse of the gas. The integrated light of the galaxies also shows that mergers can make L* elliptical galaxies, in contrast to earlier infrared studies. The isophotal shapes and related structural parameters are also discussed, including the fact that 70% of the sample show evidence for disky isophotes. The data and results presented are part of a larger photometric and spectroscopic campaign to thoroughly investigate a large sample of mergers in the local universe.