9125( 3) - 06/20/01 09:20 - [ 1] PROPOSAL FOR HUBBLE SPACE TELESCOPE OBSERVATIONS ST ScI Use Only ID: 9125 Version: 3 Check-in Date: 20-Jun-2001 09:19:35 1.Proposal Title: Are there Large Dust Grains in Orion's Proto-Planetary Disks? ------------------------------------------------------------------------------------ 2. Proposal For 3. Cycle GO 10 ------------------------------------------------------------------------------------ 4. Investigators Contact? PI: John Bally University of Colorado at Boulder CoI: Dr. Henry Throop University of Colorado N CoI: Dr. Bo Reipurth University of Colorado N CoI: Dr. Mark McCaughrean Astrophysikalisches Institut Potsdam N ------------------------------------------------------------------------------------ 5. Abstract We propose to acquire dithered PC images of six of the largest circumstellar disks in the Orion nebula to study the unique properties of dust within these systems. Previous observations of these disks indicate the dust has begun to coagulate to sizes much larger than ISM particles in the first steps toward planetary formation - - even as the disks are rapidly photoevaporated by luminous O and B stars in the nearby Trapezium cluster. By extending the wavelength range and improving the the spatial resolution of existing observations, we will be able to make definitive tests for the existence of large grains within Orion's proplyds, and explore the dynamics of these grains as the disks are being photoevaporated away. Our observations will provide insight into key scientific questions of fundamental importance: Under what conditions can planets form? Must planets form rapidly? How can we detect the earliest stages of planetary formation? ------------------------------------------------------------------------------------ 9125( 3) - 06/20/01 09:20 - [ 2] Observations Description ------------------------ We will acquire a full set of dithered exposures of the largest silhouette disks in Orion in several narrow and broad band filters in the PC. The primary goal is to obtain deep and sensitive images that can be used to determine the colors and amount of reddening produced by dust in the translucent outer parts of the disks. The orientations are chosen to maximize the secondary science from objects that fall within the WF apertures. By using a variety of roll angles, we will be able to obtain good coverage of the interior of the Orion Nebula and can use the new data for measurements of proper motions of jets, outflows, and other features by comparing the data with older HST data sets. Real Time Justification ----------------------- Calibration Justification ------------------------- Additional Comments ------------------- ------------------------------------------------------------------------------------ 9125( 3) - 06/20/01 09:20 - [ 3] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 ORION-183- ISM, HII REGION, STAR, RA=05H 35M 18.27S +/- 0.01S, 2000 V = +18.0 405 T TAURI STAR DEC=-05D 24' 09.1" +/- 0.1" F-LINE(6563)=5+/-1e-13 Coordinate Source: HST_IMAGE Epoch of Position RA proper motion (seconds of time/yr) DEC Proper Motion (arcsec/yr) Annual Parallax (arcsec) 2000 0.0 0.0 0.0 2 ORION-114- ISM, HII REGION, STAR, RA=05H 35M 11.35S +/- 1.0", DEC= 2000 V = +18.0 426 T TAURI STAR -05D 24' 26.4" +/- 1.0" F-LINE(6563)=5+/-1e-13 Coordinate Source: HST_IMAGE Epoch of Position RA proper motion (seconds of time/yr) DEC Proper Motion (arcsec/yr) Annual Parallax (arcsec) 2000 0.0 0.0 0.0 3 ORION-218- ISM, HII REGION, STAR, RA=05H 35M 21.79S +/- 0.01S, 2000 V = +18.0 354 T TAURI STAR DEC=-05D 23' 53.9" +/- 0.1" F-LINE(6563)=5+/-1e-13 Coordinate Source: HST_IMAGE Epoch of Position RA proper motion (seconds of time/yr) DEC Proper Motion (arcsec/yr) Annual Parallax (arcsec) 2000 0.0 0.0 0.0 4 ORION-132- ISM, HII REGION, STAR, RA=05H 35M 13.21S +/- 0.01S, 2000 V = +18.0 1832 T TAURI STAR DEC=-05D 18' 32.3" +/- 0.1" F-LINE(6563)=5+/-1e-13 Coordinate Source: HST_IMAGE Epoch of Position RA proper motion (seconds of time/yr) DEC Proper Motion (arcsec/yr) Annual Parallax (arcsec) 2000 0.0 0.0 0.0 5 ORION-294- ISM, HII REGION, STAR, RA=05H 35M 29.38S +/- 0.01S, 2000 V = +18.0 606 T TAURI STAR DEC=-05D 26' 06.3" +/- 0.1" F-LINE(6563)=5+/-1e-13 Coordinate Source: HST_IMAGE Epoch of Position RA proper motion (seconds of time/yr) DEC Proper Motion (arcsec/yr) Annual Parallax (arcsec) 2000 0.0 0.0 0.0 6 ORION-121- ISM, HII REGION, STAR, RA=05H 35M 12.10S +/- 0.01S, 2000 V = +18.0 1925 T TAURI STAR DEC=-05D 19' 25.0" +/- 0.1" F-LINE(6563)=5+/-1e-13 Coordinate Source: HST_IMAGE Epoch of Position RA proper motion (seconds of time/yr) DEC Proper Motion (arcsec/yr) Annual Parallax (arcsec) 2000 0.0 0.0 0.0 9125( 3) - 06/20/01 09:20 - [ 4] Patterns ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 1 Primary_Pattern Secondary_Pattern Pattern_Type WFPC2-BOX Pattern_Purpose DITHER Number_Of_Points 4 Point_Spacing 0.559017 Coordinate_Frame POS-TARG Pattern_Orient 26.565051 Center_Pattern NO ------------------------------------------------------------------------------------------------------------------------------------ 9125( 3) - 06/20/01 09:20 - [ 5] Visit: 01 Visit Priority: Visit Requirements: ORIENT 90D TO 90D On Hold Comments: Additional Comments: U3PA=90 Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 ORION-183-4 WFPC2 IMAGE PC1 F502N 5007 1 400 S PATTERN 1 1-2 ; PAR 2 05 WITH 1 ------------------------------------------------------------------------------------------------------------------------------------ 2 ANY STIS/C ACCUM F28X50O MIRROR 1 500 S CD III Comments: PAR WITH 1 ------------------------------------------------------------------------------------------------------------------------------------ 3 ORION-183-4 WFPC2 IMAGE PC1 F487N 4861 2 500 S PATTERN 1 3-4; PAR 4 WITH 05 3 ------------------------------------------------------------------------------------------------------------------------------------ 4 ANY STIS/C ACCUM F28X50O MIRROR 1 1200 S CD III Comments: PAR WITH 3 ------------------------------------------------------------------------------------------------------------------------------------ 9125( 3) - 06/20/01 09:20 - [ 6] Visit: 02 Visit Priority: Visit Requirements: ORIENT 45D TO 45D On Hold Comments: Additional Comments: U3PA=45 Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 5 ORION-114-4 WFPC2 IMAGE PC1 F502N 5007 1 400 S PATTERN 1 5-6; PAR 6 WITH 26 5 ------------------------------------------------------------------------------------------------------------------------------------ 6 ANY STIS/C ACCUM F28X50O MIRROR 1 500 S CD III Comments: PAR WITH 5 ------------------------------------------------------------------------------------------------------------------------------------ 7 ORION-114-4 WFPC2 IMAGE PC1 F487N 4861 2 500 S PATTERN 1 7-8; PAR 8 WITH 26 7 ------------------------------------------------------------------------------------------------------------------------------------ 8 ANY STIS/C ACCUM F28X50O MIRROR 1 1200 S CD III Comments: PAR WITH 7 ------------------------------------------------------------------------------------------------------------------------------------ 9125( 3) - 06/20/01 09:20 - [ 7] Visit: 03 Visit Priority: Visit Requirements: ORIENT 280D TO 280D On Hold Comments: Additional Comments: U3PA=280 Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 9 ORION-218-3 WFPC2 IMAGE PC1 F656N 6563 1 400 S PATTERN 1 9-10; PAR 10 54 WITH 9 ------------------------------------------------------------------------------------------------------------------------------------ 10 ANY STIS/C ACCUM F28X50O MIRROR 1 500 S CD III Comments: PAR WITH 9 ------------------------------------------------------------------------------------------------------------------------------------ 9125( 3) - 06/20/01 09:20 - [ 8] Visit: 04 Visit Priority: Visit Requirements: ORIENT 260D TO 260D On Hold Comments: Additional Comments: U3PA=260 Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 11 ORION-132-1 WFPC2 IMAGE PC1 F502N 5007 1 400 S PATTERN 1 11-12; PAR 12 832 WITH 11 ------------------------------------------------------------------------------------------------------------------------------------ 12 ANY STIS/C ACCUM F28X50O MIRROR 1 500 S CD III Comments: PAR WITH 11 ------------------------------------------------------------------------------------------------------------------------------------ 13 ORION-132-1 WFPC2 IMAGE PC1 F656N 6563 1 400 S PATTERN 1 13-14; PAR 14 832 WITH 13 ------------------------------------------------------------------------------------------------------------------------------------ 14 ANY STIS/C ACCUM F28X50O MIRROR 1 500 S CD III Comments: PAR WITH 13 ------------------------------------------------------------------------------------------------------------------------------------ 9125( 3) - 06/20/01 09:20 - [ 9] Visit: 05 Visit Priority: Visit Requirements: ORIENT 315D TO 315D On Hold Comments: Additional Comments: U3PA=315 Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 15 ORION-294-6 WFPC2 IMAGE PC1 F502N 5007 1 400 S PATTERN 1 15-16; PAR 16 06 WITH 15 ------------------------------------------------------------------------------------------------------------------------------------ 16 ANY STIS/C ACCUM F28X50O MIRROR 1 500 S CD III Comments: PAR WITH 15 ------------------------------------------------------------------------------------------------------------------------------------ 17 ORION-294-6 WFPC2 IMAGE PC1 F656N 6563 1 400 S PATTERN 1 17-18; PAR 18 06 WITH 17 ------------------------------------------------------------------------------------------------------------------------------------ 18 ANY STIS/C ACCUM F28X50O MIRROR 1 500 S CD III Comments: PAR WITH 17 ------------------------------------------------------------------------------------------------------------------------------------ 9125( 3) - 06/20/01 09:20 - [ 10] Visit: 06 Visit Priority: Visit Requirements: ORIENT 260D TO 260D On Hold Comments: Additional Comments: U3PA=260 Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 19 ORION-121-1 WFPC2 IMAGE PC1 F502N 5007 1 400 S PATTERN 1 19-20; PAR 20 925 WITH 19 ------------------------------------------------------------------------------------------------------------------------------------ 20 ANY STIS/C ACCUM F28X50O MIRROR 1 500 S CD III Comments: PAR WITH 19 ------------------------------------------------------------------------------------------------------------------------------------ 21 ORION-121-1 WFPC2 IMAGE PC1 F656N 6563 1 400 S PATTERN 1 21-22; PAR 22 925 WITH 21 ------------------------------------------------------------------------------------------------------------------------------------ 22 ANY STIS/C ACCUM F28X50O MIRROR 1 500 S CD III Comments: PAR WITH 21 ------------------------------------------------------------------------------------------------------------------------------------ 9125( 3) - 06/20/01 09:20 - [ 11] Summary Form for Proposal 9125 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures PC1 F28X50OIII ------------------------------------------------------------------------------------------------------------------------------------ Configurations WFPC2 STIS/CCD ------------------------------------------------------------------------------------------------------------------------------------ Opmodes IMAGE ACCUM ------------------------------------------------------------------------------------------------------------------------------------ Proposal Category GO ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements ORIENT 90D TO 90D PATTERN 1 1-2 ; PAR 2 WITH 1 PATTERN 1 3-4; PAR 4 WITH 3 ORIENT 45D TO 45D PATTERN 1 5-6; PAR 6 WITH 5 PATTERN 1 7-8; PAR 8 WITH 7 ORIENT 280D TO 280D PATTERN 1 9-10; PAR 10 WITH 9 ORIENT 260D TO 260D PATTERN 1 11-12; PAR 12 WITH 11 PATTERN 1 13-14; PAR 14 WITH 13 ORIENT 315D TO 315D PATTERN 1 15-16; PAR 16 WITH 15 PATTERN 1 17-18; PAR 18 WITH 17 PATTERN 1 19-20; PAR 20 WITH 19 PATTERN 1 21-22; PAR 22 WITH 21 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F502N MIRROR F487N F656N ------------------------------------------------------------------------------------------------------------------------------------ Target Names ORION-183-405 ANY ORION-114-426 ORION-218-354 ORION-132-1832 ORION-294-606 ORION-121-1925 ------------------------------------------------------------------------------------------------------------------------------------ Wavelengths 5007 4861 6563 ------------------------------------------------------------------------------------------------------------------------------------