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Table of Contents
Supervisor's Foreword; Publications Related to This Thesis; First-author publications; Other publications related to this thesis; Acknowledgements; Contents; Abbreviations; Symbols; 1 Introduction; 1.1 Studying Star Formation in Galaxies: A Problem of Scales; 1.2 The Main Questions; 1.2.1 Are Star Formation Histories Smooth or Irregular?; 1.2.2 Why Are Some Galaxies Forming Much More Stars than Others?; 1.2.3 Does the Interstellar Dust Hide a Significant Portion of the Star Formation Activity in the Universe?; 1.2.4 Why Do Galaxies Stop Forming Stars?; References.
2 The Main Sequence of Star-Forming Galaxies as Seen by Herschel2.1 Introduction; 2.2 Sample and Observations; 2.2.1 GOODS
North; 2.2.2 GOODS
South, UDS, and COSMOS CANDELS; 2.2.3 COSMOS UltraVISTA; 2.2.4 Photometric Redshifts and Stellar Masses; 2.2.5 Rest-Frame Luminosities and Star Formation Rates; 2.2.6 A Mass-Complete Sample of Star-Forming Galaxies; 2.2.7 Completeness and Mass Functions; 2.3 Deriving Statistical Properties of Star-Forming Galaxies; 2.3.1 Simulated Images; 2.3.2 The Stacking Procedure; 2.3.3 Measuring Flux Dispersion with Scatter Stacking.
2.3.4 SFR Dispersion from Scatter Stacking2.4 Results; 2.4.1 The SFR of Main-Sequence Galaxies; 2.4.2 Redshift Evolution of the sSFR: The Importance of Sample Selection and Dust Correction; 2.4.3 Mass Evolution of the SFR and Varying Slope of the Main Sequence; 2.4.4 Mass Evolution of the SFR Dispersion Around the Main Sequence; 2.4.5 Contribution of the Main Sequence to the Cosmic SFR Density; 2.4.6 Quantification of the Role of Starburst Galaxies and the Surprising Absence of Evolution of the Population; 2.5 Discussion.
2.5.1 Connection of the Main-Sequence Dispersion with Feedback Processes2.5.2 Connection Between Starbursts and Mergers; 2.6 Conclusions; 2.7 Appendix: The UVJ Selection; 2.8 Appendix: Tests of Our Methods on Simulated Images; 2.8.1 Mean and Median Stacked Fluxes; 2.8.2 Clustering Correction; 2.8.3 Error Estimates; References; 3 Modelling the Integrated IR Photometry of Star-Forming Galaxies; 3.1 Introduction; 3.2 A New Far Infrared Template Library; 3.2.1 Calibration on Stacked Photometry; 3.2.2 Calibration on Individual Detections; 3.3 On the Redshift and Stellar-Mass Dependence of fPAH.
3.4 Appendix: Recipe for Optimal FIR SED FittingReferences; 4 EGG: An Empirical Simulation of the Observable Universe; 4.1 Introduction; 4.2 Sample Description; 4.2.1 Multi-wavelength Photometry; 4.2.2 Redshifts and Stellar Masses; 4.3 Stellar Properties; 4.3.1 Redshift and Stellar Mass; 4.3.2 Star Formation Rate and Obscuration; 4.3.3 Optical Morphology; 4.3.4 Optical Spectral Energy Distribution; 4.3.5 Sky Position; 4.4 Dust Properties; 4.5 Generating a Light Cone; 4.6 Results; 4.6.1 Comparison to the Observed GOODS
South Field; 4.6.2 Comparison to the Measured Cosmic Backgrounds.
2 The Main Sequence of Star-Forming Galaxies as Seen by Herschel2.1 Introduction; 2.2 Sample and Observations; 2.2.1 GOODS
North; 2.2.2 GOODS
South, UDS, and COSMOS CANDELS; 2.2.3 COSMOS UltraVISTA; 2.2.4 Photometric Redshifts and Stellar Masses; 2.2.5 Rest-Frame Luminosities and Star Formation Rates; 2.2.6 A Mass-Complete Sample of Star-Forming Galaxies; 2.2.7 Completeness and Mass Functions; 2.3 Deriving Statistical Properties of Star-Forming Galaxies; 2.3.1 Simulated Images; 2.3.2 The Stacking Procedure; 2.3.3 Measuring Flux Dispersion with Scatter Stacking.
2.3.4 SFR Dispersion from Scatter Stacking2.4 Results; 2.4.1 The SFR of Main-Sequence Galaxies; 2.4.2 Redshift Evolution of the sSFR: The Importance of Sample Selection and Dust Correction; 2.4.3 Mass Evolution of the SFR and Varying Slope of the Main Sequence; 2.4.4 Mass Evolution of the SFR Dispersion Around the Main Sequence; 2.4.5 Contribution of the Main Sequence to the Cosmic SFR Density; 2.4.6 Quantification of the Role of Starburst Galaxies and the Surprising Absence of Evolution of the Population; 2.5 Discussion.
2.5.1 Connection of the Main-Sequence Dispersion with Feedback Processes2.5.2 Connection Between Starbursts and Mergers; 2.6 Conclusions; 2.7 Appendix: The UVJ Selection; 2.8 Appendix: Tests of Our Methods on Simulated Images; 2.8.1 Mean and Median Stacked Fluxes; 2.8.2 Clustering Correction; 2.8.3 Error Estimates; References; 3 Modelling the Integrated IR Photometry of Star-Forming Galaxies; 3.1 Introduction; 3.2 A New Far Infrared Template Library; 3.2.1 Calibration on Stacked Photometry; 3.2.2 Calibration on Individual Detections; 3.3 On the Redshift and Stellar-Mass Dependence of fPAH.
3.4 Appendix: Recipe for Optimal FIR SED FittingReferences; 4 EGG: An Empirical Simulation of the Observable Universe; 4.1 Introduction; 4.2 Sample Description; 4.2.1 Multi-wavelength Photometry; 4.2.2 Redshifts and Stellar Masses; 4.3 Stellar Properties; 4.3.1 Redshift and Stellar Mass; 4.3.2 Star Formation Rate and Obscuration; 4.3.3 Optical Morphology; 4.3.4 Optical Spectral Energy Distribution; 4.3.5 Sky Position; 4.4 Dust Properties; 4.5 Generating a Light Cone; 4.6 Results; 4.6.1 Comparison to the Observed GOODS
South Field; 4.6.2 Comparison to the Measured Cosmic Backgrounds.