11146( 3) - 02-Jan-2008 15:41:36 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 11146 Version: 3 Check-in Time: 02-Jan-2008 15:41:36 STScI Edit Number: 1 Title The Role of Stellar Feedback in Galaxy Evolution ------------------------------------------------------------------------------------ Type Cycle Parallel Pointing Tolerance GO 16 ------------------------------------------------------------------------------------ Investigators Contact? PI: Prof. Daniela Calzetti University of Massachusetts CoI: Dr. Rupali Chandar Carnegie Institution of Washington N CoI: Prof. John S. Gallagher III University of Wisconsin - Madison N CoI: Dr. Jason Harris University of Arizona N CoI: Prof. Robert C. Kennicutt Jr. University of Cambridge N CoI: Dr. Crystal Martin University of California - Santa Barbara N CoI: Dr. Anne Pellerin Space Telescope Science Institute N CoI: Dr. David Strickland The Johns Hopkins University N ------------------------------------------------------------------------------------ Abstract Stellar feedback - the return of mass and energy from star formation to the interstellar medium - is one of the primary engines of galaxy evolution. Yet, the observational canvass of feedback is incomplete. We propose to investigate this fundamental aspect of star formation on one local actively star-forming galaxy, He2-10, selected to occupy an unexplored niche in the key parameter space of stellar mass. The WFPC2 narrow-band observations in the light of H-beta, [OIII], H-alpha, and [SII] will: (1) discriminate the feedback-induced shock fronts from the photoionized regions; (2) map, and provide a complete census of, the shocks inside and around the starburst regions; and (3) measure the energy budget of the star-formation-produced shocks. These observations, joined by our previous data and studies on starbursts, will yield: (1) the efficiency of the feedback, i.e. the fraction of the star formation's mechanical energy transported out of the starburst volume rather than radiated away, in the dual-parameter space of host's stellar mass and star formation intensity; (2) the conditions under which feedback morphs from a localized process to a galactic scale mechanism. The high angular resolution of HST is crucial for separating the spatially narrow shock fronts (~10 pc=0.2" at 10 Mpc) from the more extended photoionization fronts. This project will provide the most comprehensive quantitative foundation of stellar feedback and a gauge for determining the role of feedback in the energetics, structure and star formation history of galaxies. ------------------------------------------------------------------------------------ Observations Description ------------------------ WFPC2 F487N, F502N, F658N, and F673N narrow-band images, centered on the emission lines H-beta, [OIII], H-alpha, and [SII] doublet, together with medium/broad band images in F547M and F814W for probing the underlying stellar continuum, will be obtained for the starburst galaxy Henize 2-10. The images will be centered in the WF3 chip, which can accomodate the entire starburst region plus surrounding areas. 4 dithered images, using the WFPC2-BOX pattern, will be obtained in each filter, for cosmic ray and hot pixel removal. Total exposure times will be: 920 sec in F547M, 640 sec in F814W, 4400 sec in 11146( 3) - 02-Jan-2008 15:41:36 - [ 2] F487N, 5200 sec in F502N, 2000 sec in F658N, and 3200 sec in F673N. Real Time Justification ----------------------- Calibration Justification ------------------------- Additional Comments ------------------- ------------------------------------------------------------------------------------ 11146( 3) - 02-Jan-2008 15:41:36 - [ 3] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 HE2-10 GALAXY, SHOCK FRONT, RA=08H36M15.1800S +/- 0.1", J2000 V = V = 12.45 STARBURST DEC=-26D24'33.90" +/- 0.1" 873.0 Reference Frame: ICRS Comments: ------------------------------------------------------------------------------------------------------------------------------------ 11146( 3) - 02-Jan-2008 15:41:36 - [ 4] Patterns ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 1 Primary_Pattern Secondary_Pattern Pattern_Type WFPC2-BOX Pattern_Purpose DITHER Number_Of_Points 0.559017 Point_Spacing 4 Line_Spacing 0.559017 Coordinate_Frame POS-TARG Pattern_Orient 26.56505 Angle_Between_Sides 143.1301 Center_Pattern NO ------------------------------------------------------------------------------------------------------------------------------------ 11146( 3) - 02-Jan-2008 15:41:36 - [ 5] Visit: 01 Visit Priority: Visit Requirements: On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 HE2-10 WFPC2 IMAGE WF3-FIX F487N CR-SPLIT=NO 1 1100.0 S PATTERN 1 1-3 ------------------------------------------------------------------------------------------------------------------------------------ 2 HE2-10 WFPC2 IMAGE WF3-FIX F673N CR-SPLIT=NO 1 800.0 S ------------------------------------------------------------------------------------------------------------------------------------ 3 HE2-10 WFPC2 IMAGE WF3-FIX F814W CR-SPLIT=NO 1 160.0 S ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ HE2-10 1 WFPC2 IMAGE WF3-FIX F487N 1 none none none 1 N/A HE2-10 1 WFPC2 IMAGE WF3-FIX F487N 2 none none none 2 N/A HE2-10 1 WFPC2 IMAGE WF3-FIX F487N 3 none none none 3 N/A HE2-10 1 WFPC2 IMAGE WF3-FIX F487N 4 none none none 4 N/A HE2-10 2 WFPC2 IMAGE WF3-FIX F673N 1 none none none 1 N/A HE2-10 2 WFPC2 IMAGE WF3-FIX F673N 2 none none none 2 N/A HE2-10 2 WFPC2 IMAGE WF3-FIX F673N 3 none none none 3 N/A HE2-10 2 WFPC2 IMAGE WF3-FIX F673N 4 none none none 4 N/A HE2-10 3 WFPC2 IMAGE WF3-FIX F814W 1 none none none 1 N/A HE2-10 3 WFPC2 IMAGE WF3-FIX F814W 2 none none none 2 N/A HE2-10 3 WFPC2 IMAGE WF3-FIX F814W 3 none none none 3 N/A HE2-10 3 WFPC2 IMAGE WF3-FIX F814W 4 none none none 4 N/A 11146( 3) - 02-Jan-2008 15:41:36 - [ 6] Visit: 02 Visit Priority: Visit Requirements: On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 HE2-10 WFPC2 IMAGE WF3-FIX F502N CR-SPLIT=NO 1 1300.0 S PATTERN 1 1-3 see below ------------------------------------------------------------------------------------------------------------------------------------ 2 HE2-10 WFPC2 IMAGE WF3-FIX F658N CR-SPLIT=NO 1 500.0 S see below ------------------------------------------------------------------------------------------------------------------------------------ 3 HE2-10 WFPC2 IMAGE WF3-FIX F547M CR-SPLIT=NO 1 230.0 S see below ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ HE2-10 1 WFPC2 IMAGE WF3-FIX F502N 1 none none none 1 1300.0 S HE2-10 1 WFPC2 IMAGE WF3-FIX F502N 2 none none none 2 1300.0 S HE2-10 1 WFPC2 IMAGE WF3-FIX F502N 3 none none none 3 1300.0 S HE2-10 1 WFPC2 IMAGE WF3-FIX F502N 4 none none none 4 1300.0 S HE2-10 2 WFPC2 IMAGE WF3-FIX F658N 1 none none none 1 500.0 S HE2-10 2 WFPC2 IMAGE WF3-FIX F658N 2 none none none 2 500.0 S HE2-10 2 WFPC2 IMAGE WF3-FIX F658N 3 none none none 3 500.0 S HE2-10 2 WFPC2 IMAGE WF3-FIX F658N 4 none none none 4 500.0 S HE2-10 3 WFPC2 IMAGE WF3-FIX F547M 1 none none none 1 260.0 S HE2-10 3 WFPC2 IMAGE WF3-FIX F547M 2 none none none 2 260.0 S HE2-10 3 WFPC2 IMAGE WF3-FIX F547M 3 none none none 3 260.0 S HE2-10 3 WFPC2 IMAGE WF3-FIX F547M 4 none none none 4 260.0 S 11146( 3) - 02-Jan-2008 15:41:36 - [ 7] Visit: A2 Visit Priority: Visit Requirements: On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 HE2-10 WFPC2 IMAGE WF3-FIX F502N CR-SPLIT=NO 1 1300.0 S POS TARG 0.498, 0.249 see below ------------------------------------------------------------------------------------------------------------------------------------ 2 HE2-10 WFPC2 IMAGE WF3-FIX F658N CR-SPLIT=NO 1 500.0 S POS TARG 0.498, 0.249 see below ------------------------------------------------------------------------------------------------------------------------------------ 3 HE2-10 WFPC2 IMAGE WF3-FIX F547M CR-SPLIT=NO 1 230.0 S POS TARG 0.498, 0.249 see below ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ HE2-10 1 WFPC2 IMAGE WF3-FIX F502N none none none none 1 1300.0 S HE2-10 2 WFPC2 IMAGE WF3-FIX F658N none none none none 1 500.0 S HE2-10 3 WFPC2 IMAGE WF3-FIX F547M none none none none 1 260.0 S 11146( 3) - 02-Jan-2008 15:41:36 - [ 8] Summary Form for Proposal 11146 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures WF3-FIX ------------------------------------------------------------------------------------------------------------------------------------ Configurations WFPC2 ------------------------------------------------------------------------------------------------------------------------------------ Opmodes IMAGE ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters CR-SPLIT=NO ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements PATTERN 1 1-3, POS TARG 0.498, 0.249 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F487N, F502N, F547M, F658N, F673N, F814W ------------------------------------------------------------------------------------------------------------------------------------ Target Names HE2-10 ------------------------------------------------------------------------------------------------------------------------------------