0 Assigned ID: 377 ----- Attempting Submission 1 (Fri Apr 08 04:06:21 GMT 2016) ----- 0 ----- Attempting Submission 1 (Fri Jul 15 02:10:59 GMT 2016) ----- Correlating proper motion kinematics with stellar properties in a very young protocluster We recently obtained the first epoch of a multi-cycle HST program (GO13742) aimed at the study of massive star cluster formation through proper motion-based analysis of kinematics. This program targeted the young, gas-dominated, still-forming protocluster G286 with WFC3/IR J, H and narrow band F167N, reaching down to the H-burning limit at A_V=20, and well into the substellar regime for the less-embedded parts of the system. With the second epoch (cycle 24) we will derive proper motions, kinematic subclustering, runaway objects and determine the overall expansion/contraction of the system. Here we propose to complement these observations with additional photometric bands, which will allow us to derive the stellar parameters of the low-mass members. We plan to use the H2O Teff band at 1.4micron, with a continuum at 1.3micron, to disentangle Teff and A_V for all low-mass young stars down to the H-burning limit at A_V=20, matching our previous data. This will enable us to construct the HRD, assign ages, look for spatial age gradients, and compare kinematic properties with age. Specifically, the identification of systematic variations in the proper motions with age will enable us to trace the initial morphology of the system at its formation, and determine the kinematic association of older stars with younger. Last, we plan to obtain accurate fluxes in Paschen beta, whose excess is indicative of accretion (allowing us to measure Mdot) and is an independent indicator of membership. Accretion properties, with ages, masses, and dynamics will enable a comprehensive picture of this young, massive protocluster in formation, testing theories of massive star cluster formation. This is a manually defined 3x3 mosaic with WFC3/IR Each tile/visit covers one orbit. For each tile 3 exposures are taken in F128N and F130N, and 2 in F139M, all dithered. We impose two small ranges of orient angles (with 180 rotation between them), so that the final coverage will closely match that of the 3x3 mosaic of our previous program GO13742. This is needed since the data of both programs will have to be analyzed together. Visit 3 is rotated 90 degrees, as it ended up being reobserved in program GO13742 after with its original orientation no guide star could be used by the telescope. Stellar Populations 12 false false false false false false SUPPORTED STELLAR CLUSTER OB ASSOCIATION OPEN CLUSTER STAR FORMING REGION YOUNG ASSOCIATION J2000 J2000 STELLAR CLUSTER OB ASSOCIATION OPEN CLUSTER STAR FORMING REGION YOUNG ASSOCIATION J2000 J2000 STELLAR CLUSTER OB ASSOCIATION OPEN CLUSTER STAR FORMING REGION YOUNG ASSOCIATION J2000 J2000 STELLAR CLUSTER OB ASSOCIATION OPEN CLUSTER STAR FORMING REGION YOUNG ASSOCIATION J2000 J2000 STELLAR CLUSTER OB ASSOCIATION OPEN CLUSTER STAR FORMING REGION YOUNG ASSOCIATION J2000 J2000 STELLAR CLUSTER OB ASSOCIATION OPEN CLUSTER STAR FORMING REGION YOUNG ASSOCIATION J2000 J2000 STELLAR CLUSTER OB ASSOCIATION OPEN CLUSTER STAR FORMING REGION YOUNG ASSOCIATION J2000 J2000 STELLAR CLUSTER OB ASSOCIATION OPEN CLUSTER STAR FORMING REGION YOUNG ASSOCIATION J2000 J2000 STELLAR CLUSTER OB ASSOCIATION OPEN CLUSTER STAR FORMING REGION YOUNG ASSOCIATION J2000 J2000 WFC3/IR Imaging No No F128N WFC3/IR Imaging No No F130N WFC3/IR Imaging No No F139M C:\SCIENCE\HST_proposals_2016\GO286\phaseII\OP-cache\phaseII-v01.xml The scheduling data was generated by CASM 24.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 14595 :visit-id "01" :proposal-version -1 :trans-version "20160601" :date "14-Jul-2016 21:19:02.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "30" :si-bright-earth-limb-angle 20.0 :data-volume 1897584 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 14595 :visit-id "01" :obset-id "01" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 14595 :visit-id "01" :orbit-number 1 :pcs-time 333 :si-vis-utilization 3102 :al-overhead-at-end 0 :internal-dur-at-end 576 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3456 :pcs-gap 0 ) true 1 0 C:\SCIENCE\HST_proposals_2016\GO286\phaseII\OP-cache\phaseII-v02.xml The scheduling data was generated by CASM 24.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 14595 :visit-id "02" :proposal-version -1 :trans-version "20160601" :date "14-Jul-2016 21:24:39.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "30" :si-bright-earth-limb-angle 20.0 :data-volume 1897584 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 14595 :visit-id "02" :obset-id "02" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 14595 :visit-id "02" :orbit-number 1 :pcs-time 333 :si-vis-utilization 3102 :al-overhead-at-end 0 :internal-dur-at-end 576 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3456 :pcs-gap 0 ) true 1 0 C:\SCIENCE\HST_proposals_2016\GO286\phaseII\OP-cache\phaseII-v03.xml The scheduling data was generated by CASM 24.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 14595 :visit-id "03" :proposal-version -1 :trans-version "20160601" :date "14-Jul-2016 22:03:24.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "30" :si-bright-earth-limb-angle 20.0 :data-volume 1897584 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 14595 :visit-id "03" :obset-id "03" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 14595 :visit-id "03" :orbit-number 1 :pcs-time 333 :si-vis-utilization 3102 :al-overhead-at-end 0 :internal-dur-at-end 576 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3456 :pcs-gap 0 ) true 1 0 C:\SCIENCE\HST_proposals_2016\GO286\phaseII\OP-cache\phaseII-v04.xml The scheduling data was generated by CASM 24.2. CASM was run in Phase II mode. 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