Compilation of wide-field images

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Table of contents

i introduction
1 introduction 
1.1 Star formation in the solar neighbourhood
1.1.1 The star formation process
1.1.2 Formation of substellar objects
1.1.3 The initial mass function as a proxy for star formation
1.2 Astrometric and photometric surveys
1.2.1 The Gaia mission
1.2.2 The COSMIC-DANCe project
1.3 Motivation and goals of the thesis
1.4 Thesis outline
ii origin of the initial mass function
2 strategy 
2.1 The DANCe catalogue
2.1.1 Compilation of wide-field images
2.1.2 Astrometric solution
2.1.3 Photometric solution
2.2 Membership analysis
2.2.1 Field model
2.2.2 Cluster model
2.2.3 Probability threshold from synthetic data
2.3 Towards the mass function
2.3.1 From apparent to absolute magnitudes
2.3.2 From absolute magnitudes to luminosity and mass .
2.3.3 From individual masses to a mass distribution
3 imf at 30 myr: ic 4665 
3.1 Context
3.2 Data
3.2.1 The Gaia catalogue
3.2.2 The DANCe catalogue
3.3 Membership analysis
3.3.1 Parameters of the membership algorithm
3.3.2 Internal validation
3.3.3 External validation
3.4 Results
3.4.1 Isochrones
3.4.2 Apparent magnitude distribution
3.4.3 Present-day system mass function
3.4.4 Spatial distribution
3.5 Conclusions
4 imf at 1–10 myr: upper scorpius and r ophiuchus 
4.1 Context
4.2 Data
4.2.1 The Hipparcos catalogue
4.2.2 The Gaia catalogue
4.2.3 The DANCe catalogue
4.3 Membership analysis
4.3.1 Parameters of the membership algorithm
4.3.2 Internal validation
4.3.3 External validation
4.4 Results
4.4.1 Structure in the 6D phase space
4.4.2 Isochrones
4.4.3 Apparent magnitude distribution
4.4.4 Luminosity and present-day system mass function
4.4.5 Constrains on the formation of free-floating planets
4.5 Conclusions
iii properties of stellar groups
5 dynamical ages 
5.1 Context
5.2 Data and sample selection
5.2.1 Proper motions and parallaxes
5.2.2 Radial velocities
5.2.3 Kinematic sample selection
5.2.4 Bona fide b Pic sample
5.3 Traceback analysis
5.3.1 Towards a dynamical age estimate
5.3.2 Signs of substructure at birth time
5.3.3 Effect of the Galactic potential
5.4 Discussion
5.5 Conclusions
6 debris discs 
6.1 Context
6.2 Data
6.2.1 Photometric database
6.2.2 Photometry filtering
6.2.3 Completeness
6.3 Infrared excess detection
6.3.1 MIPS 24 mm data
6.3.2 IRAC 3.6 􀀀 8.0 mm data
6.3.3 WISE 3.4 􀀀 22 mm data
6.4 Spectral energy distribution
6.5 Candidates of hosting a debris disc
6.6 Discussion
6.7 Conclusions
iv conclusions and perspectives
7 summary, conclusions, and perspectives 
7.1 Summary and conclusions
7.2 Future perspectives
v appendix
a dynamical age of b pic 
a.1 Cross-match with Gaia DR2
a.2 Kinematically discarded sources
b queries 
b.1 IC 4665
b.2 USC and r Oph
c additional tables 
d résumé substantiel 
bibliography