6754( 7) - 07/14/97 13:00 - [ 1] PROPOSAL FOR HUBBLE SPACE TELESCOPE OBSERVATIONS ST ScI Use Only ID: 6754 Version: 7 Check-in Date: 14-Jul-1997 12:59:48 1.Proposal Title: Imaging of the HH 30 Circumstellar Disk and Jets ------------------------------------------------------------------------------------ 2. Scientific Category 3. Proposal For 4. Cycle BINARIES AND STAR FOR GO 6 ------------------------------------------------------------------------------------ 5. Investigators Contact? PI: Karl Stapelfeldt JET PROPULSION LABORATORY CoI: Christopher Burrows Space Telescope Science Institute N CoI: John Krist Space Telescope Science Institute N CoI: Alan Watson UNAM-Morelia Mexico N ------------------------------------------------------------------------------------ 6. Abstract Recent Hubble Space Telescope images have revealed HH 30 to be a prototype young stellar object (YSO) system possessing an optically thick circumstellar absorption disk extended perpendicular to highly collimated bipolar jets. The visible disk is 450 AU (3.2") in diameter and shows a resolved flaring profile consistent with accretion disk theory. This system is the first YSO disk ever observed at 14 AU resolution, and the first viewed close enough to edge-on that the vertical structure of the disk is clearly visible. We propose to build upon our initial results with Cycle 6 observations that address the following goals: 1) Further resolve the system by observing with the Planetary Camera, to better constrain the disk flaring profile; 2) measure the polarization structure of the nebulosity for comparison with multiple scattering models; 3) produce a much better map of the nebular colors via deeper imaging at short wavelengths; and 4) define the time history of the jet flow and the outer extent of the disk nebulosity via deep R band imaging. These studies of HH 30 offer a unique opportunity to expand understanding of accretion disk structure, and thereby constrain the disk evolution processes which profoundly affect theories of the origin of the solar system. ------------------------------------------------------------------------------------ 6754( 7) - 07/14/97 13:00 - [ 2] Observations Description ------------------------ Visits 02, 03, and 04 are polarization imaging on the PC. We allow changes in the telescope roll angle to provide us with the needed polarization coverage. Since HH 30 is a variable source, these visits should execute as close together in time as possible. This means an "opposition campaign". Experience with program 5845 is very relevant to this program, as its target and HH 30 are only 90 arcsec apart. 5845 was able to achieve exactly 60 degree roll angle spacings between its three visits and take observations on Nov. 28, Dec. 02, and Dec. 13 1995. We ask that visits 02, 03, and 04 be implemented in exactly the same way in fall 1997. Visit 01 consists of 4 orbits of direct imaging, plus 1 orbit of polarization imaging on the WFs. The latter is insurance against the possibility that HH 30 varies in brightness during the course of visits 02, 03, and 04. ORIENTs and POS TARGs for this visit are very tightly constrained in order that useful information can be obtained on HL Tau and XZ Tau simultaneously with HH 30. Real Time Justification ----------------------- Not Applicable. Calibration Justification ------------------------- No calibration requests. Additional Comments ------------------- None. ------------------------------------------------------------------------------------ Data Distribution Media: 8MM Blocking Factor: 10 Ship To: PI_Address Ship Via: UPS Email: ------------------------------------------------------------------------------------ 6754( 7) - 07/14/97 13:00 - [ 3] TARGET LIST a) Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 HH-30 ISM, Herbig-Haro Object RA=04H 28M 43.60S +/- 0.1S, DEC= B1950 V = 19.5 18D 06' 03.0" +/- 1.0" 6754( 7) - 07/14/97 13:00 - [ 4] Visit: 01 Visit Requirements: ORIENT 75D TO 75D On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 10 HH-30 WFPC2 IMAGE PC1 F814W CLOCKS=YES,ATD-GAIN=7, 1 2500 S CR-SPLIT=0.52,CR-TOLERANCE=0.0 ------------------------------------------------------------------------------------------------------------------------------------ 11 HH-30 WFPC2 IMAGE PC1 F675W CLOCKS=YES,ATD-GAIN=7, 1 600 S CR-SPLIT=0.5,CR-TOLERANCE=0.0 ------------------------------------------------------------------------------------------------------------------------------------ 12 HH-30 WFPC2 IMAGE WF3 F675W CLOCKS=YES,ATD-GAIN=7,CR-SPLIT=NO 1 1200 S POS TARG 0.0,15.0 ------------------------------------------------------------------------------------------------------------------------------------ 13 HH-30 WFPC2 IMAGE WF3 F555W CLOCKS=YES,ATD-GAIN=7,CR-SPLIT=NO 1 230 S POS TARG 0.0,15.0 ------------------------------------------------------------------------------------------------------------------------------------ 14 HH-30 WFPC2 IMAGE WF3 F555W CLOCKS=YES,ATD-GAIN=7,CR-SPLIT=NO 1 230 S POS TARG 0.0,15.0 ------------------------------------------------------------------------------------------------------------------------------------ 15 HH-30 WFPC2 IMAGE WF3 F439W CLOCKS=YES,ATD-GAIN=7, 1 2200 S POS TARG 0.0,15.0 CR-SPLIT=0.5,CR-TOLERANCE=0.0 ------------------------------------------------------------------------------------------------------------------------------------ 16 HH-30 WFPC2 IMAGE WF3 F675W CLOCKS=YES,ATD-GAIN=7, 1 2600 S POS TARG 0.0,15.0 CR-SPLIT=0.50,CR-TOLERANCE=0.0 ------------------------------------------------------------------------------------------------------------------------------------ 17 HH-30 WFPC2 IMAGE WF3 F555W, CLOCKS=YES,ATD-GAIN=7, 1 460 S POLQ CR-SPLIT=0.5,CR-TOLERANCE=0.0 ------------------------------------------------------------------------------------------------------------------------------------ 18 HH-30 WFPC2 IMAGE WF2 F555W, CLOCKS=YES,ATD-GAIN=7, 1 460 S POLQ CR-SPLIT=0.5,CR-TOLERANCE=0.0 ------------------------------------------------------------------------------------------------------------------------------------ 19 HH-30 WFPC2 IMAGE POLQN33 F555W, CLOCKS=YES,ATD-GAIN=7, 1 460 S POLQN33 CR-SPLIT=0.5,CR-TOLERANCE=0.0 ------------------------------------------------------------------------------------------------------------------------------------ 6754( 7) - 07/14/97 13:00 - [ 5] Visit: 02 Visit Requirements: GROUP 2-4 WITHIN 20D On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 21 HH-30 WFPC2 IMAGE PC1 F555W CLOCKS=YES,ATD-GAIN=7,CR-SPLIT=NO 1 260 S ------------------------------------------------------------------------------------------------------------------------------------ 22 HH-30 WFPC2 IMAGE PC1 F555W, CLOCKS=YES,ATD-GAIN=7, 1 1800 S POLQ CR-SPLIT=0.5,CR-TOLERANCE=0.0 ------------------------------------------------------------------------------------------------------------------------------------ 6754( 7) - 07/14/97 13:00 - [ 6] Visit: 03 Visit Requirements: ORIENT 57D TO 63D FROM 02 On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 31 HH-30 WFPC2 IMAGE PC1 F555W CLOCKS=YES,ATD-GAIN=7,CR-SPLIT=NO 1 260 S ------------------------------------------------------------------------------------------------------------------------------------ 32 HH-30 WFPC2 IMAGE PC1 F555W, CLOCKS=YES,ATD-GAIN=7, 1 1800 S POLQ CR-SPLIT=0.5,CR-TOLERANCE=0.0 ------------------------------------------------------------------------------------------------------------------------------------ 6754( 7) - 07/14/97 13:00 - [ 7] Visit: 04 Visit Requirements: ORIENT 117D TO 123D FROM 02 On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 41 HH-30 WFPC2 IMAGE PC1 F555W CLOCKS=YES,ATD-GAIN=7,CR-SPLIT=NO 1 350 S ------------------------------------------------------------------------------------------------------------------------------------ 42 HH-30 WFPC2 IMAGE PC1 F555W, CLOCKS=YES,ATD-GAIN=7, 1 1800 S POLQ CR-SPLIT=0.5,CR-TOLERANCE=0.0 ------------------------------------------------------------------------------------------------------------------------------------ 6754( 7) - 07/14/97 13:00 - [ 8] Summary Form for Proposal 6754 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Configurations WFPC2 ------------------------------------------------------------------------------------------------------------------------------------ Opmodes IMAGE ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters CLOCKS=YES ATD-GAIN=7 CR-SPLIT=0.52 CR-TOLERANCE=0.0 CR-SPLIT=0.5 CR-SPLIT=NO CR-SPLIT=0.50 ------------------------------------------------------------------------------------------------------------------------------------ Proposal Category GO ------------------------------------------------------------------------------------------------------------------------------------ Scientific Category BINARIES AND STAR FORMATION ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements ORIENT 75D TO 75D POS TARG 0.0,15.0 GROUP 2-4 WITHIN 20D ORIENT 57D TO 63D FROM 02 ORIENT 117D TO 123D FROM 02 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F814W F675W F555W F439W F555W,POLQ F555W,POLQN33 ------------------------------------------------------------------------------------------------------------------------------------ Target Names HH-30 ------------------------------------------------------------------------------------------------------------------------------------