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| Paper: |
Gravitational Instabilities in Disks with Radiative Cooling |
| Volume: |
294, Scientific Frontiers in Research on Extrasolar Planets |
| Page: |
287 |
| Authors: |
Mejía, A. C.; Durisen, R. H.; Pickett, B. K. |
| Abstract: |
Previous simulations of self-gravitating protoplanetary disks by our group have shown that, once developed, gravitational instabilities are enhanced by cooling the disk constantly during its evolution (Pickett et al. 2002). These earlier calculations included a very simple form of volumetric cooling which acted against the stabilizing effects of shock heating. The present work incorporates more realistic treatments of energy transport. The initial disk model extends from 2.3 to 40 AU, has a mass of 0.07 M⊙, and orbits a 0.5 M⊙ star. The models evolve for a period of over 2500 years, during which the structure of the disks is profoundly altered, transient clumps form in one case, but no permanent bound companion objects develop. |
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