0Assigned ID: 1265
----- Attempting Submission 1 (Sun Jan 31 21:33:24 GMT 2016) -----
HST Phase I Proposal 1265 (protostars_midcycle23b.aptx.apt) successfully submitted.
Receipt: # 1265-1
----- Attempting Submission 2 (Sun Jan 31 22:19:10 GMT 2016) -----
----- Attempting Submission 3 (Mon Feb 01 19:05:38 GMT 2016) -----0----- Attempting Submission 1 (Thu Apr 14 00:57:44 GMT 2016) -----
----- Attempting Submission 2 (Tue May 03 20:39:22 GMT 2016) -----Peering to the Heart of Massive Star Birth. II. Completion of the Eight-Source Pilot SurveyWe propose to complete a survey of 8 massive and intermediate-mass protostars with WFC3/IR to probe the J and H band continuum and Pa-beta and [FeII] emission lines. The protostar sample is already the subject of approved SOFIA-FORCAST observations from 10-40 microns, and an awarded ALMA Cycle 3 time at 0.14 arcsecond resolution. Combined with sophisticated radiative transfer models, these observations are providing the most detailed constraints on the nature, luminosities, outflow cavity structures and distribution of surrounding dense core gas and dust of massive protostars. In the first round of Mid-Cycle 23, we were awarded time to observe 5 of the sources with HST, limited by the maximum orbits of Mid-Cycle programs. Here we propose to complete the survey of the remaining 3 sources.
The proposed HST observations have 3 main goals: (1) Detect and characterize J and H band continuum emission, arising from jet and outflow knot features and from emerging scattered light; (2) Detect and characterize Pa-beta and [FeII] line emission tracing ionized and FUV-illuminated regions, important diagnostics of the protostellar source and its outflow structure; (3) Search for lower-mass protostars clustered around the forming massive protostar. All of these objectives will help test massive star formation theories. The high sensitivity and resolution of WFC3/IR enables these observations to be carried out very efficiently. Mid-Cycle observations are important to have near contemporaneous observation with ALMA, and at similar resolution, since jet/outflow knots may have large proper motions, and to maximize the potential time baseline for a future HST study of jet/outflow motions.This is very straight forward program.
3 visits, each of them of one orbit, each of them on one of 3 independent targets (massive protostars).
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