扩展Groth带II中Spitzer/IRAC源的UV到FIR分析：光度学红移、恒星质量和恒星形成率
UV-to-FIR analysis of Spitzer/IRAC sources in the Extended Groth Strip II: Photometric redshifts, Stellar masses and Star formation rates
摘要：
基于已经编译并在配套论文（Barro et al. 2011 a，Paper I）中提出的紫外到远红外测光，我们对扩展Groth带中近80，000个IRAC 3.6+4.5微米选定星系进行了详细的SED分析。我们估计光度红移，恒星质量和恒星形成率分别为每个星系在这个大样本。该目录包括76，936个[3.6] < 23.75的源（IRAC调查的85%完整性水平）超过0.48平方度。典型的测光红移精度是Δ z/（1+z）=0.034，灾难性的异常值分数仅为2%。在恒星质量的计算中，我们量化了使用不同的恒星星族合成库和IMF所引入的系统学。我们发现系统的偏移范围从0.1到0.4德克斯，与一个典型的分散0.3德克斯。我们还提供了所有样本星系的紫外线和红外线为基础的SFR，基于几套尘埃排放模板和SFR指标。我们使用EGS中提供的深FIDEL 70微米数据评估不同SFR估计的系统差异和良好性。基于IR的SFR的典型随机不确定性为2倍，当仅MIPS 24微米数据可用时，在z $\gtrsim$ 1.5处观察到不可忽略的系统效应。本论文和配套论文中描述的所有数据产品（SED，成像数据的邮票，以及对每个星系的光度红移，恒星质量和SFR的不同估计）都是公开的，并且可以通过我们的网络界面实用程序Rainbow-navigator访问
英文摘要：
Based on the ultraviolet to far-infrared photometry already compiled and presented in a companion paper (Barro et al. 2011a, Paper I), we present a detailed SED analysis of nearly 80,000 IRAC 3.6+4.5 micron selected galaxies in the Extended Groth Strip. We estimate photometric redshifts, stellar masses, and star formation rates separately for each galaxy in this large sample. The catalog includes 76,936 sources with [3.6] < 23.75 (85% completeness level of the IRAC survey) over 0.48 square degrees. The typical photometric redshift accuracy is Delta z/(1+z)=0.034, with a catastrophic outlier fraction of just 2%. We quantify the systematics introduced by the use of different stellar population synthesis libraries and IMFs in the calculation of stellar masses. We find systematic offsets ranging from 0.1 to 0.4 dex, with a typical scatter of 0.3 dex. We also provide UV- and IR-based SFRs for all sample galaxies, based on several sets of dust emission templates and SFR indicators. We evaluate the systematic differences and goodness of the different SFR estimations using the deep FIDEL 70 micron data available in the EGS. Typical random uncertainties of the IR-bases SFRs are a factor of two, with non-negligible systematic effects at z$\gtrsim$1.5 observed when only MIPS 24 micron data is available. All data products (SEDs, postage stamps from imaging data, and different estimations of the photometric redshifts, stellar masses, and SFRs of each galaxy) described in this and the companion paper are publicly available, and they can be accessed through our the web-interface utility Rainbow-navigator
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