THE OBJECTIVE OF THIS PROPOSAL IS TO INVESTIGATE SEVERAL ASPECTS OF THE INSIDE-OUT PLANET FORMATION MODEL RECENTLY PROPOSED BY CHATTERJEE&TAN (2014). THIS MODEL INVOLVES SEQUENTIAL FORMATION OF PLANETS FROM PEBBLE (I.E. ~CENTIMETER TO ~METER-SIZED PARTICLE)- RICH RINGS IN THE INNER REGIONS OF PROTOPLANETARY DISKS. PEBBLES FORMED FROM DUST COAGULATION MIGRATE TO THE INNER DISK BECAUSE OF GAS DRAG AND COLLECT AT A LOCAL PRESSURE MAXIMUM ASSOCIATED WITH THE INNER BOUNDARY OF THE DEAD ZONE WITH A MAGNETO-ROTATIONAL INSTABILITY (MRI)-ACTIVE REGION. ONCE THE FIRST PLANET FORMS FROM THE PEBBLE RING IT MAY EITHER GROW TO OPEN A GAP LEADING TO DEAD ZONE RETREAT OR MIGRATE INWARDS INTO THE MRI-ACTIVE REGION. IN EITHER CASE A NEW PEBBLE RING STARTS TO FORM EXTERIOR TO THE PLANET AND THE PROCESS REPEATS. THIS MODEL MAY HELP EXPLAIN THE SYSTEMS OF TIGHTLY-PACKED INNER PLANETS (STIPS) RECENTLY DISCOVERED BY KEPLER
$214,329FY2020National Aeronautics and Space AdministrationNASA
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