LEADER 03466nam 2200457 450 001 996472059803316 005 20231110232231.0 010 $a9789811917653$b(electronic bk.) 010 $z9789811917646 035 $a(MiAaPQ)EBC6962833 035 $a(Au-PeEL)EBL6962833 035 $a(CKB)21639815300041 035 $a(PPN)262168847 035 $a(EXLCZ)9921639815300041 100 $a20221121d2022 uy 0 101 0 $aeng 135 $aurcnu|||||||| 181 $ctxt$2rdacontent 182 $cc$2rdamedia 183 $acr$2rdacarrier 200 10$aDust-gas instabilities in protoplanetary disks $etoward understanding planetesimal formation /$fRyosuke Tominaga 210 1$aSingapore :$cSpringer,$d[2022] 210 4$dİ2022 215 $a1 online resource (125 pages) 225 1 $aSpringer Theses 311 08$aPrint version: Tominaga, Ryosuke Dust-Gas Instabilities in Protoplanetary Disks Singapore : Springer,c2022 9789811917646 327 $aIntro -- Supervisor's Foreword -- Acknowledgements -- Contents -- 1 Introduction -- 1.1 From Molecular Cloud Cores to Protoplanetary Disks -- 1.2 Dust Dynamics in Protoplanetary Disks -- 1.2.1 Radial Drift and Vertical Sedimentation -- 1.2.2 The Effects of Turbulence on Dust Grains -- 1.2.3 Gravitational Instability of a Dust Layer -- 1.2.4 Secular Gravitational Instability -- 1.3 ALMA Observations of Annular Substructures -- 1.4 Purposes of This Thesis -- References -- 2 Revision of Macroscopic Equations for Dust Diffusion -- 2.1 Short Introduction: Unphysical Momentum Transport Due to the Diffusion Term -- 2.2 Reformulation of Basic Equations from the Mean-Field Approximation -- 2.3 Linear Analyses -- 2.3.1 Basic Equations -- 2.3.2 Linearized Equations -- 2.3.3 Results -- 2.4 Discussion: Effects of Disk Thickness -- 2.5 Summary -- References -- 3 Numerical Simulations of Secular Instabilities -- 3.1 Short Introduction -- 3.2 Numerical Methods -- 3.2.1 Lagrangian-Cell Method -- 3.2.2 The Piecewise Exact Solution for Friction -- 3.2.3 Methods for Turbulent Diffusion and Viscosity -- 3.3 Simulations of Radially Extended Disks -- 3.3.1 Formation of Transient Low-Contrast Dust Rings -- 3.4 Discussion -- 3.4.1 Linear Analyses with Dust Drift -- 3.4.2 Condition for the Thin Dense Ring Formation -- 3.4.3 Fate of Dense Dusty Rings -- 3.4.4 Observational Justification -- 3.4.5 Effects on Dust-to-Gas Ratio Dependence on the Dust Coefficient -- 3.5 Summary -- References -- 4 Coagulation Instability: Self-induced Dust Concentration -- 4.1 Short Introduction -- 4.2 Basic Equations for Linear Analyses with Dust Growth -- 4.3 Linear Analyses and Results -- 4.4 Discussion -- 4.4.1 Impact of Dust Diffusion -- 4.4.2 Effects of Other Collision Velocities. 327 $a4.4.3 Coevolution with Other Dust-Gas Instabilities: Bridging a Gap Between First Dust Growth and Hydrodynamical Clumping Toward Planetesimal Formation -- 4.5 Summary -- References -- 5 Summary and Future Prospects -- 5.1 Summary of This Thesis -- 5.2 Future Prospects -- References. 410 0$aSpringer Theses 606 $aPlanets$xOrigin 606 $aProtoplanetary disks 615 0$aPlanets$xOrigin. 615 0$aProtoplanetary disks. 676 $a523.4 700 $aTominaga$b Ryosuke$01223121 801 0$bMiAaPQ 801 1$bMiAaPQ 801 2$bMiAaPQ 912 $a996472059803316 996 $aDust-Gas Instabilities in Protoplanetary Disks$92837449 997 $aUNISA