A Bridge from Optical to Infrared Galaxies: Explaining Local Properties and Predicting Galaxy Counts and the Cosmic Background Radiation
A Bridge from Optical to Infrared Galaxies: Explaining Local Properties and Predicting Galaxy Counts and the Cosmic Background Radiation
复制标题
从光学星系到红外星系的桥梁：解释局部特性并预测星系计数和宇宙背景辐射
DOI：
10.1086/339628
复制
发表时间：
2002
期刊：
影响因子：
--
通讯作者：
T. Takeuchi
中科院分区：
文献类型：
--
作者：
T. Totani;T. Takeuchi
我们给出了一个解释的起源在本地红外星系观察到的各种属性和预测星系计数和宇宙背景辐射（CBR）使用一个新的模型扩展从光学/近红外星系。本研究的重要新特点是：（1）基于光学星系的大小-光度关系，引入了尘埃消光的质量尺度依赖性;（2）基于能量平衡的物理考虑，而不是利用在本地星系中发现的Tdust与总红外光度LIR之间的经验关系，计算了大颗粒尘埃温度Tdust，这在以前的大多数作品中已经被采用。因此，红外星系的局部性质，即，光学/红外光度比，LIR-Tdust相关性和红外光度函数是模型预测的输出，而这些都是以前模型的输入。我们的模型确实相当好地再现了这些局部属性。然后，我们预测微弱的红外计数（在15，60，90，170，450和850 μm）和CBR使用该模型。我们发现，结果与大多数以前的作品的经验LIR-Tdust关系的基础上有很大的不同，特别是，它表明，星爆原始椭圆星系的尘埃温度预计是非常高的（40-80 K），经常看到在星暴星系或超亮红外星系在本地和高Z宇宙。这表明椭圆星系形成过程中的强烈星暴应该发生在z ~ 2-3处，而不是以前的结果，即z ~ 1以上的显著星暴往往会过度产生COBE/FIRAS探测到的远红外（FIR）CBR。另一方面，我们的模型预测，中红外（MIR）通量从温暖/非平衡尘埃是相对较弱的，在这样的星系，使FIR CBR，这种效果调和的初步冲突之间的上限从TeV伽马射线观测和COBE检测FIR CBR的MIR CBR。根据我们的模型还提出了TeV γ射线的星系际光学厚度。
We give an explanation for the origin of various properties observed in local infrared galaxies and make predictions for galaxy counts and cosmic background radiation (CBR) using a new model extended from that for optical/near-infrared galaxies. Important new characteristics of this study are that (1) mass scale dependence of dust extinction is introduced based on the size-luminosity relation of optical galaxies and that (2) the large-grain dust temperature Tdust is calculated based on a physical consideration for energy balance rather than by using the empirical relation between Tdust and total infrared luminosity LIR found in local galaxies, which has been employed in most previous works. Consequently, the local properties of infrared galaxies, i.e., optical/infrared luminosity ratios, LIR-Tdust correlation, and infrared luminosity function are outputs predicted by the model, while these have been inputs in a number of previous models. Our model indeed reproduces these local properties reasonably well. Then we make predictions for faint infrared counts (in 15, 60, 90, 170, 450, and 850 μm) and CBR using this model. We found results considerably different from those of most previous works based on the empirical LIR-Tdust relation; especially, it is shown that the dust temperature of starbursting primordial elliptical galaxies is expected to be very high (40-80 K), as often seen in starburst galaxies or ultraluminous infrared galaxies in the local and high-z universe. This indicates that intense starbursts of forming elliptical galaxies should have occurred at z ~ 2-3, in contrast to the previous results that significant starbursts beyond z ~ 1 tend to overproduce the far-infrared (FIR) CBR detected by COBE/FIRAS. On the other hand, our model predicts that the mid-infrared (MIR) flux from warm/nonequilibrium dust is relatively weak in such galaxies making FIR CBR, and this effect reconciles the prima facie conflict between the upper limit on MIR CBR from TeV gamma-ray observations and the COBE detections of FIR CBR. The intergalactic optical depth of TeV gamma rays based on our model is also presented.
DOI：
10.1086/305331
发表时间：
1997-09
期刊：
The Astrophysical Journal
影响因子：
--
作者：
L. Tresse;S. Maddox
通讯作者：
L. Tresse;S. Maddox
T.Totani 等人：“弥散河外背景光与斯巴鲁深场中的深部星系计数：宇宙中缺失的光？”Astrop.J.Letters (2001)
DOI：
--
发表时间：
--
期刊：
影响因子：
--
作者：
通讯作者：
--