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MOST PLANETS ARE IN BINARY STAR SYSTEMS AND THUS UNDERSTANDING PLANET FORMATION IN BINARIES IS ESSENTIAL FOR EXPLAINING OBSERVED EXOPLANET PROPERTIES. PLANETS FORM IN AND AROUND THE BINARY IN CIRCUMSTELLAR AND CIRCUMBINARY DISKS RESPECTIVELY. OBSERVATIONS INDICATE THAT SUCH DISKS MAY FORM MISALIGNED WITH RESPECT TO THE ORBITAL PLANE OF THE BINARY. A MISALIGNED CIRCUMBINARY PROTOPLANETARY DISK AROUND AN ECCENTRIC BINARY EVOLVES EITHER TOWARDS COPLANAR OR TOWARDS AN ORIENTATION THAT IS PERPENDICULAR TO THE ORBITAL PLANE OF THE BINARY (POLAR ALIGNMENT) DEPENDING ON THE DISK AND BINARY PARAMETERS. WE PROPOSE TO FORM A COMPLETE UNDERSTANDING OF CIRCUMBINARY DISK EVOLUTION AND HENCE THE INITIAL INCLINATION DISTRIBUTION FOR CIRCUMBINARY PLANETS. WE WILL INVESTIGATE HOW THE EVOLUTION OF A GAS DISK AFFECTS THE DUST WITHIN IT AND IMPLICATIONS FOR PLANET FORMATION IN MISALIGNED CIRCUMBINARY DISKS. WE WILL EXPLORE THE STABILITY OF MISALIGNED CIRCUMBINARY PLANETARY SYSTEMS. A CIRCUMSTELLAR DISK AROUND ONE COMPONENT OF A BINARY EVOLVES TOWARDS COPLANAR ALIGNMENT IN THE ABSENCE OF ACCRETION ON TO THE DISK. HOWEVER CIRCUMBINARY DISKS MAY FEED THE FORMATION OF CIRCUMSTELLAR DISKS AROUND EACH BINARY COMPONENT. THE ACCRETION OF HIGH INCLINATION MATERIAL AFFECTS THE DYNAMICS OF THE CIRCUMSTELLAR DISK THAT MAY LEAD TO LONG LIVED KOZAI-LIDOV OSCILLATIONS OF THE DISK ECCENTRICITY AND INCLINATION. WE PROPOSE TO INVESTIGATE THE FORMATION AND EVOLUTION OF CIRCUMSTELLAR DISKS FROM A MISALIGNED CIRCUMBINARY DISK. FINALLY WE WILL CONSIDER THE EVOLUTION OF DUST IN A DISK UNDERGOING KOZAI-LIDOV OSCILLATIONS AND IMPLICATIONS FOR PLANET FORMATION IN HIGHLY MISALIGNED CIRCUMSTELLAR DISKS. WE PROPOSE TO STUDY THESE PROCESSES BY MEANS OF ANALYTIC ONE-DIMENSIONAL AND THREE-DIMENSIONAL SIMULATIONS. THE RESULTS WILL PROVIDE INSIGHTS INTO THE ORIGIN AND CURRENT STATE OF CIRCUMBINARY PLANETS AND HIGHLY INCLINED AND ECCENTRIC PLANETS IN BINARIES.

$541,460FY2021National Aeronautics and Space AdministrationNASA

Board Of Regents Of Nevada System Of Higher Education

Investigators

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