COSMOS场中高红移星系的远红外至毫米波段的观测研究
发布时间：2021-04-27 16:45
远红外至亚毫米波段的观测数据集中了星系中大部分的尘埃辐射,是研究星系中恒星形成活动和搜寻高红移星系的有力工具。COSMOS场有着丰富的多波段和高质量的观测数据,为高红移星系的大样本统计性研究提供了良好的实验场所。为了克服远红外至亚毫米波段的数据的低分辨率对测光的限制,我们利用Super-deblending技术对COSMOS场中的星系进行了退混合测光。我们首先选取了一个高度完备的星系样本,这个样本包含了约8.8万个有射电或24微米探测的星系和约10万个以恒星质量为标准选取的星系。在退混合测光过程中,我们利用谱能量分布拟合来预估这些星系在远红外和亚毫米波段的流量,然后把暗源从图像中扣除并对剩余的星系进行点扩散函数测光。我们对图像的拟合过程进行了蒙特卡洛仿真模拟,并利用模拟的结果对点扩散函数测光进行校准和修正,得到了类高斯的误差分布。对于低灵敏度图像,相比于前人类似的工作,我们引入了更仔细的方法来扣除暗源和计算测光误差,进一步提高了测光质量。基于这些工作,我们获得的主要研究成果如下:（1）我们建立了一个红外和亚毫米测光目录,这个目录包含了约19万个星系在24微米至射电共11个波段的测光数据...
【文章来源】：南京大学江苏省 211工程院校 985工程院校 教育部直属院校
【文章页数】：138 页
【学位级别】：博士
【文章目录】：
摘要
Abstract
1 Introduction
1.1 Dust emission in the COSMOS field
4"> 1.2 Dusty star forming galaxies at z>4
1.3 Massive galaxy cluster at high redshift
2 "Super-deblended" Far-IR to (sub)mm photometry in the full COSMOS field
2.1 Initial catalogs and multi-wavelength data sets
2.1.1 Initial catalogs and spectroscopic redshifts
2.1.2 Mid-infrared and radio images
2.1.3 Far-infrared and (sub-)millimeter images
2.2 Setting up the prior catalogs
2.2.1 K_s(+radio) priors for 24 μm and radio images
2.2.2 Photometry at MIPS 24 μm on K_s selected priors
2.2.3 Photometry at VLA 1.4 and 3 GHz on K_s-selected priors
2.2.4 The effective depth of our 24 μm+radio prior catalog
2.2.5 Completing the prior catalog with stellar mass-selected galaxies
2.3 "Super-deblended" photometry in the FIR/(sub)mm images
2.3.1 SED fitting algorithm
2.3.2 Differences in deblending work from L18
2.3.3 SED fitting algorithm and parameters
2.3.4 Faint sources subtraction in COSMOS
2.3.5 Flux bias and uncertainties calibration via improved Monte Carlosimulation
2.3.6 Selecting additional sources in the residual images
3 The COSMOS "Super-deblended" photometry catalog
3.1 General properties of the "Super-deblended" photometry catalog
3.2 Comparison to catalogs from the literature
3.2.1 PEP catalogs
3.2.2 SPIRE XID~+ catalogs
3.2.3 SCUBA2 catalogs
3.2.4 Comparison to ALMA archival photometry
4 Exploring high redshift galaxies using "super-deblended" photometry and mmlines
4.1 High redshift dusty star forming galaxies candidates
4"> 4.1.1 Candidates selection at z>4
4.1.2 Redshift-dust temperature degeneracy
4.1.3 An interesting case of possible lensing
4"> 4.1.4 AGN components at z>4
4.1.5 Counterparts for candidates found in residual images
4.1.6 General sample and final considerations on redshift estimates
4.2 Redshift confirmation via ALMA/NOEMA line scans
5 Radio selection of high redshift galaxy cluster
5.1 Radio continuum emission from galaxies in a z=2.5 cluster
5.2 Radio selection of the z=2.5 W16 cluster
5.3 Two candidates of galaxy clusters at z～3
5.4 Discussion
6 Summary
References
AppendixA MIPS 24μm calibration factor
AppendixB "Super-deblending" Images Products and Simulation Correction Analyses
B.1 Photometry Image Products
B.2 Simulation Correction Analyses
AppendixC High redshift candidates
Shuowen JlN—Curriculum Vitae
致谢
本文编号：3163813
【文章来源】：南京大学江苏省 211工程院校 985工程院校 教育部直属院校
【文章页数】：138 页
【学位级别】：博士
【文章目录】：
摘要
Abstract
1 Introduction
1.1 Dust emission in the COSMOS field
4"> 1.2 Dusty star forming galaxies at z>4
1.3 Massive galaxy cluster at high redshift
2 "Super-deblended" Far-IR to (sub)mm photometry in the full COSMOS field
2.1 Initial catalogs and multi-wavelength data sets
2.1.1 Initial catalogs and spectroscopic redshifts
2.1.2 Mid-infrared and radio images
2.1.3 Far-infrared and (sub-)millimeter images
2.2 Setting up the prior catalogs
2.2.1 K_s(+radio) priors for 24 μm and radio images
2.2.2 Photometry at MIPS 24 μm on K_s selected priors
2.2.3 Photometry at VLA 1.4 and 3 GHz on K_s-selected priors
2.2.4 The effective depth of our 24 μm+radio prior catalog
2.2.5 Completing the prior catalog with stellar mass-selected galaxies
2.3 "Super-deblended" photometry in the FIR/(sub)mm images
2.3.1 SED fitting algorithm
2.3.2 Differences in deblending work from L18
2.3.3 SED fitting algorithm and parameters
2.3.4 Faint sources subtraction in COSMOS
2.3.5 Flux bias and uncertainties calibration via improved Monte Carlosimulation
2.3.6 Selecting additional sources in the residual images
3 The COSMOS "Super-deblended" photometry catalog
3.1 General properties of the "Super-deblended" photometry catalog
3.2 Comparison to catalogs from the literature
3.2.1 PEP catalogs
3.2.2 SPIRE XID~+ catalogs
3.2.3 SCUBA2 catalogs
3.2.4 Comparison to ALMA archival photometry
4 Exploring high redshift galaxies using "super-deblended" photometry and mmlines
4.1 High redshift dusty star forming galaxies candidates
4"> 4.1.1 Candidates selection at z>4
4.1.2 Redshift-dust temperature degeneracy
4.1.3 An interesting case of possible lensing
4"> 4.1.4 AGN components at z>4
4.1.5 Counterparts for candidates found in residual images
4.1.6 General sample and final considerations on redshift estimates
4.2 Redshift confirmation via ALMA/NOEMA line scans
5 Radio selection of high redshift galaxy cluster
5.1 Radio continuum emission from galaxies in a z=2.5 cluster
5.2 Radio selection of the z=2.5 W16 cluster
5.3 Two candidates of galaxy clusters at z～3
5.4 Discussion
6 Summary
References
AppendixA MIPS 24μm calibration factor
AppendixB "Super-deblending" Images Products and Simulation Correction Analyses
B.1 Photometry Image Products
B.2 Simulation Correction Analyses
AppendixC High redshift candidates
Shuowen JlN—Curriculum Vitae
致谢
本文编号：3163813
本文链接：https://www.wllwen.com/kejilunwen/tianwen/3163813.html
