Catastrophic events in protoplanetary disks and their ...
Transcript of Catastrophic events in protoplanetary disks and their ...
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Catastrophic events in protoplanetary
disks and their observational
manifestations
Tatiana Demidova
Crimean astrophysical observatory of RAS Vladimir Grinin
Central Astronomical Observatory of RAS
St Petersburg University
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HD 135344B, Cazzoletti et al., 2018 HD 143006, Perez et al., 2018
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RXJ 1615, Avenhaus et al., 2018 HD 163296, Huang et al., 2018
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HD 169142 HD 97048 RU Lup
Elias 24 AS 209 GW Lup
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Model
0.48 AU
10 µm, 100 µm, 1 mm
Mw = 4 · 1025 g, Ve = 50±50 m s-1
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Jackson & Wyatt 2012; Genda et al. 2015
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Protoplanetary disk
(Dutrey et al. 1994; Chiang & Goldreich 1997; Dullemond & Dominik 2004).
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Main equations for gas and dust
g
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Method SPH (Lucy,1977; Gingold & Monaghan, 1977)
Smoothed value Interpolation sum
Derivative
Kernel properties
h — smoothing lenght
Interpolation kernel
q = r/h Laibe & Price (2014)
Dust simulation
Gas simulation
GADGET-2 (Springel, 2010)
http://www.mpa-garching.mpg.de/gadget/
modified by Demidova (2016)
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Results of simulation
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Disk images at wavelength 1.3 mm (RADMC-3D http://www.ita.uni-heidelberg.de/~dullemond/software/radmc-3d/)
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Collision of planetesimals is a natural process for protoplanetary disks (Meng et al., 2014;
Genda et al., 2015);
The planet may contribute to the ejection of planetesimals to the periphery of the disk
(Batygin & Morbidelli, 2013; Morrison & Malhotra, 2015);
The initial mass of the colliding bodies can be 10 times less than the mass of the clump;
Events in the Solar system: the formation of the Moon (Cameron & Ward, 1976),
formation of the Pluto-Charon system (Canup 2005, Stern et al., 2006), inclination of the
axis of Uranus (Slattery et al. 1992) could be the consequences of a catastrophic
collision;
Large emission of dust in the protoplanetary disk is possible with the destruction of the
planet (Nayakshin et al. 2020).
Justification of the model