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MANY ULTRAVIOLET SPECTRA OF CATACLYSMIC VARIABLES (CVS) WITH A WHITE DWARF (WD) ACCRETING AT A HIGH RATE HAVE BEEN DIFFICULT EVEN IMPOSSIBLE TO MODEL WITH STANDARD DISK MODELS. THE STANDARD DISK MODELS APPEAR TO BE TOO BLUE IN COMPARISON TO THE OBSERVED SPECTRA. WE PROPOSE TO CARRY OUT A SYSTEMATIC AND CONSISTENT ANALYSIS OF ARCHIVAL ULTRAVIOLET SPECTRA OF 90 CVS USING A TRUNCATED INNERDISK MODEL (BASED AND BACKED BY OBSERVATIONAL DATA AND THEORETICAL RESULTS). WE USE THE SYNTHETIC STELLAR SPECTRA CODES TLUSTY AND SYNSPEC TO GENERATE THESE SYNTHETIC SPECTRA. DERIVING MASS ACCRETION RATES FOR CVS WILL ADVANCE THE THEORIES OF EVOLUTION OF CVS AS WELL AS SHED LIGHT ON THE PHYSICS OF ACCRETION DISKS. AS A BY PRODUCT WE WILL MAKE OUR THEORETICAL SPECTRA PUBLICLY AVAILABLE ONLINE.THIS WILL BE OF INVALUABLE IMPORTANCE TO FUTURE NASA UV MISSIONS. THE WD IS THE MOST COMMON END-PRODUCT OF STELLAR EVOLUTION AND THE ACCRETION DISK IS THE MOST COMMON UNIVERSAL STRUCTURE RESULTING FROM MASS TRANSFER WITH ANGULAR MOMENTUM AND BOTH CAN BE OBSERVED IN CVS IN THE UV. AS A CONSEQUENCE AN UNDERSTANDING OF ACCRETION IN CV SYSTEMS IS THE FIRST STEP TOWARD A GLOBAL UNDERSTANDING OF ACCRETION IN OTHER SYSTEMS THROUGHOUT THE UNIVERSE RANGING FROM YOUNG STELLAR OBJECTS GALACTIC BINARIES TO AGN.THIS ADP PROPOSAL ADDRESS THE NASA STRATEGIC GOALS AND SCIENCE OUTCOMES 3D: DISCOVER THE ORIGIN STRUCTURE EVOLUTION AND DESTINY OF THE UNIVERSE AND SEARCH FOR EARTH-LIKE PLANETS.

$266,611FY2017National Aeronautics and Space AdministrationNASA

Villanova University In The State Of Pennsylvania

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