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   Phase1ID="1985"
   Phase2ID="13273"
   Phase="Phase I"
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   <!--Date: Sat Mar 02 00:04:51 GMT 2013-->
   
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            NotificationAddress="evesperi@indiana.edu"
            AssignedID="1985">
            
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            <SubmissionLog>Assigned ID: 1985

----- Attempting Submission 1 (Sat Mar 02 00:04:51 GMT 2013) -----</SubmissionLog>
            
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   <ProposalInformation
      Category="AR"
      PureParallelProposal="false"
      Cycle="21"
      STScIEditNumber="0"
      ProposalSize="SMALL">
      
      <Title>Effects of dynamical evolution on the stellar mass function of multiple population globular clusters</Title>
      
      <Abstract>Many observational studies have shown that globular clusters (GCs) host multiple stellar populations, challenging the standard view of GC formation, in which GCs are simple stellar populations composed of stars of uniform age and chemical composition.
Theoretical models of multiple-population GC formation predict that second-generation (SG) stars form in a compact subsystem embedded in a more extended first-generation (FG) cluster. Observational studies have found that in several GCs SG stars are indeed more concentrated in the cluster inner regions and still retain memory of the initial segregation predicted by theoretical models. We propose to study the effects of dynamical evolution on the stellar mass function (MF) in multiple-population GCs. No study has previously addressed this problem in this context, taking into account the structural properties predicted by models of formation and evolution of multiple-population GCs and exploring the evolution of the SG and FG MFs. We will study the evolution of the total MF of the cluster as well as the individual MFs of the FG and SG populations. We will address a series of questions concerning the evolution of both the global MF and the local MF (measured at different distances from the cluster center), and the relation between the present-day MF and the initial MF. We will determine how the evolution of the combined MF, and the differences between the FG and the SG MFs, can be used to explore the formation and dynamics of multiple-population GCs. As observational studies of these clusters continue to improve, our work will provide the tools needed to interpret existing data and guide future observational projects.</Abstract>
      
      <PrincipalInvestigator
         Honorific="Dr."
         FirstName="Enrico"
         LastName="Vesperini"
         ESAMember="false"
         UniqueID="4779"
         Institution="Indiana University System"
         Country="USA"
         State="IN"
         Contact="true" />
      
      <CoInvestigator
         Honorific="Dr."
         FirstName="Steve"
         LastName="McMillan"
         ESAMember="false"
         UniqueID="7285"
         Institution="Drexel University"
         Country="USA"
         State="PA"
         Contact="false"
         AdminUSPI="false" />
      
      <CoInvestigator
         Honorific="Dr."
         FirstName="Franca"
         LastName="D'Antona"
         ESAMember="true"
         UniqueID="4955"
         Institution="INAF, Osservatorio Astronomico di Roma"
         Country="ITA"
         Contact="false"
         AdminUSPI="false" />
      
      <CoInvestigator
         Honorific="Dr."
         FirstName="Annibale"
         LastName="D'Ercole"
         ESAMember="true"
         UniqueID="5501"
         Institution="INAF, Osservatorio Astronomico di Bologna"
         Country="ITA"
         Contact="false"
         AdminUSPI="false" />
      
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      <Orbits
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         ThisCycle2GyroParallel="0"
         NextCycle2GyroPrimary="0"
         NextCycle2GyroParallel="0"
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      <Phase1ProposalInformation
         TotalTargets="1"
         Attachment="/home/vesperin/proposals/HST21/proposal.pdf">
         
         <ScientificCategory>RESOLVED STELLAR POPULATIONS</ScientificCategory>
         
         <ScientificKeyword1
            Keyword="Dynamics" />
         
         <ScientificKeyword2
            Keyword="Globular Clusters" />
         
         <ScientificKeyword3
            Keyword="Resolved Stellar Populations" />
         
         <ProprietaryPeriod>Default</ProprietaryPeriod>
         
         <Budget>Medium</Budget>
         
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         <Availability>SUPPORTED</Availability>
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