6816( 5) - 01/23/97 17:22 - [ 0] PROPOSAL FOR HUBBLE SPACE TELESCOPE OBSERVATIONS ST ScI Use Only ID: 6816 Version: 5 Check-in Date: 23-Jan-1997 17:12:38 1.Proposal Title: The Small Scale Structure and Symmetries in Proto-Planetary and Young Planetary Nebulae ------------------------------------------------------------------------------------ 2. Scientific Category 3. Proposal For 4. Cycle INTERSTELLAR MEDIUM GO 6 ------------------------------------------------------------------------------------ 5. Investigators Contact? PI: RAGHVENDRA SAHAI Jet Propulsion Laboratory CoI: John Trauger Jet Propulsion Laboratory/ Caltech N CoI: Valentin Bujarrabal Centro Astronomico de Yebes N CoI: J. Alcolea Centro Astronomico de Yebes N CoI: A. Zijlstra European Southern Observatory N ------------------------------------------------------------------------------------ 6. Abstract Proto-planetary (PPNe) and young planetary nebulae (PNe) show a dazzling variety of non-spherical morphologies, whereas the circumstellar envelopes of the AGB red giant stars from which they evolve are mostly round. Although a number of theoretical models have been proposed to explain this paradox, no consensus has emerged so far. A major reason for this is that in ground-based observations, the seeing merges together small -scale structural details which provide valuable clues to the mass- ejection processes mediating the AGB-to-PN transformation. However, using WFPC-2/HST it is now possible to sensitively image small-scale structures such as jets, disks, arcs, knots etc. and characterise their symmetry, enabling more definitive testing of various evolutionary models. A dramatic illustration of this statement is provided by our recent imaging of the PPNe CRL2688 and the young PNe MyCn18. We will image three PPNe similar to CRL2688, and two young PNe with striking bipolar structural symmetries (like MyCn18). The PPNe, seen in scattered stellar light will be imaged through a wide-band continuum filter (F606W), and the polariser quad (POLQ) will be used to measure the polarisation structure. The PNe will be imaged using narrow-band filters covering the H Alpha(F656N), OI(F631N), OIII(F502N), and SII(F673N) lines. These data will allow us to search for clues to the formation and evolution of PPNe & PNe, and enable the construction of detailed models of their 3- dimensional structure. ------------------------------------------------------------------------------------ Data Distribution Media: 8MM Blocking Factor: 10 Ship To: PI_Address Ship Via: UPS Email: , ------------------------------------------------------------------------------------ 6816( 5) - 01/23/97 17:22 - [ 1] TARGET LIST a) Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 HEN401 ISM, Reflection Nebula RA = 10H 19M 32.6S +/- 1.0S, J2000 SURF(V) = 19+/-1 DEC =-60D 13' 29" +/- 1.0" 2 ROBERTS22 ISM, Reflection Nebula RA = 10H 21M 33.4S +/- 1.0S, J2000 SURF(V) = 19+/-1 DEC =-58D 05' 50" +/- 1.0" 3 FROSTYLEO ISM, Reflection Nebula RA = 09H 37M 11.8S +/- 0.5S, B1950 SURF(V) = 18+/-1 DEC = 12D 12' 31" +/- 5.0" 6816( 5) - 01/23/97 17:22 - [ 2] Visit: 01 Visit Requirements: CVZ 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 ------------------------------------------------------------------------------------------------------------------------------------ 100 HEN401 WFPC2 IMAGE PC1 F656N CLOCKS=YES,CR-TOLERANCE=0.0, 1 400 S CR-SPLIT=0.5,ATD-GAIN=7 ------------------------------------------------------------------------------------------------------------------------------------ 107 HEN401 WFPC2 IMAGE PC1 F673N CLOCKS=YES,CR-TOLERANCE=0.0, 1 1200 S CR-SPLIT=0.5,ATD-GAIN=7 ------------------------------------------------------------------------------------------------------------------------------------ 110 HEN401 WFPC2 IMAGE PC1 F606W CLOCKS=YES,CR-TOLERANCE=0.0, 1 400 S CR-SPLIT=0.5,ATD-GAIN=7 ------------------------------------------------------------------------------------------------------------------------------------ 115 HEN401 WFPC2 IMAGE PC1 F606W CLOCKS=YES,CR-TOLERANCE=0.0, 1 800 S CR-SPLIT=0.5,ATD-GAIN=7 ------------------------------------------------------------------------------------------------------------------------------------ 120 HEN401 WFPC2 IMAGE WF3 F606W CLOCKS=YES,CR-TOLERANCE=0.0, 1 400 S CR-SPLIT=0.5,ATD-GAIN=7 ------------------------------------------------------------------------------------------------------------------------------------ 125 HEN401 WFPC2 IMAGE WF3 F606W CLOCKS=YES,CR-TOLERANCE=0.0, 1 800 S CR-SPLIT=0.5,ATD-GAIN=7 ------------------------------------------------------------------------------------------------------------------------------------ 130 HEN401 WFPC2 IMAGE WF3 F606W, CLOCKS=YES,CR-TOLERANCE=0.0, 1 400 S POLQ CR-SPLIT=0.5,ATD-GAIN=7 ------------------------------------------------------------------------------------------------------------------------------------ 135 HEN401 WFPC2 IMAGE WF3 F606W, CLOCKS=YES,CR-TOLERANCE=0.0, 1 800 S POLQ CR-SPLIT=0.5,ATD-GAIN=7 ------------------------------------------------------------------------------------------------------------------------------------ 140 HEN401 WFPC2 IMAGE WF2 F606W, CLOCKS=YES,CR-TOLERANCE=0.0, 1 400 S POLQ CR-SPLIT=0.5,ATD-GAIN=7 ------------------------------------------------------------------------------------------------------------------------------------ 145 HEN401 WFPC2 IMAGE WF2 F606W, CLOCKS=YES,CR-TOLERANCE=0.0, 1 800 S POLQ CR-SPLIT=0.5,ATD-GAIN=7 ------------------------------------------------------------------------------------------------------------------------------------ 150 HEN401 WFPC2 IMAGE WF4 F606W, CLOCKS=YES,CR-TOLERANCE=0.0, 1 400 S POLQ CR-SPLIT=0.5,ATD-GAIN=7 ------------------------------------------------------------------------------------------------------------------------------------ 155 HEN401 WFPC2 IMAGE WF4 F606W, CLOCKS=YES,CR-TOLERANCE=0.0, 1 800 S POLQ CR-SPLIT=0.5,ATD-GAIN=7 ------------------------------------------------------------------------------------------------------------------------------------ 6816( 5) - 01/23/97 17:22 - [ 3] Visit: 02 Visit Requirements: CVZ 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 ------------------------------------------------------------------------------------------------------------------------------------ 200 ROBERTS22 WFPC2 IMAGE PC1 F656N CLOCKS=YES,ATD-GAIN=7 1 200 S ------------------------------------------------------------------------------------------------------------------------------------ 205 ROBERTS22 WFPC2 IMAGE PC1 F656N CLOCKS=YES,ATD-GAIN=7 1 200 S ------------------------------------------------------------------------------------------------------------------------------------ 207 ROBERTS22 WFPC2 IMAGE PC1 F673N CLOCKS=YES,CR-TOLERANCE=0.0, 1 1200 S CR-SPLIT=0.5,ATD-GAIN=7 ------------------------------------------------------------------------------------------------------------------------------------ 210 ROBERTS22 WFPC2 IMAGE PC1 F606W CLOCKS=YES,CR-TOLERANCE=0.0, 1 400 S CR-SPLIT=0.5,ATD-GAIN=7 ------------------------------------------------------------------------------------------------------------------------------------ 215 ROBERTS22 WFPC2 IMAGE PC1 F606W CLOCKS=YES,CR-TOLERANCE=0.0, 1 800 S CR-SPLIT=0.5,ATD-GAIN=7 ------------------------------------------------------------------------------------------------------------------------------------ 220 ROBERTS22 WFPC2 IMAGE WF3 F606W CLOCKS=YES,CR-TOLERANCE=0.0, 1 400 S CR-SPLIT=0.5,ATD-GAIN=7 ------------------------------------------------------------------------------------------------------------------------------------ 225 ROBERTS22 WFPC2 IMAGE WF3 F606W CLOCKS=YES,CR-TOLERANCE=0.0, 1 800 S CR-SPLIT=0.5,ATD-GAIN=7 ------------------------------------------------------------------------------------------------------------------------------------ 230 ROBERTS22 WFPC2 IMAGE WF3 F606W, CLOCKS=YES,CR-TOLERANCE=0.0, 1 400 S POLQ CR-SPLIT=0.5,ATD-GAIN=7 ------------------------------------------------------------------------------------------------------------------------------------ 235 ROBERTS22 WFPC2 IMAGE WF3 F606W, CLOCKS=YES,CR-TOLERANCE=0.0, 1 800 S POLQ CR-SPLIT=0.5,ATD-GAIN=7 ------------------------------------------------------------------------------------------------------------------------------------ 240 ROBERTS22 WFPC2 IMAGE WF2 F606W, CLOCKS=YES,CR-TOLERANCE=0.0, 1 400 S POLQ CR-SPLIT=0.5,ATD-GAIN=7 ------------------------------------------------------------------------------------------------------------------------------------ 245 ROBERTS22 WFPC2 IMAGE WF2 F606W, CLOCKS=YES,CR-TOLERANCE=0.0, 1 800 S POLQ CR-SPLIT=0.5,ATD-GAIN=7 ------------------------------------------------------------------------------------------------------------------------------------ 250 ROBERTS22 WFPC2 IMAGE WF4 F606W, CLOCKS=YES,CR-TOLERANCE=0.0, 1 400 S POLQ CR-SPLIT=0.5,ATD-GAIN=7 ------------------------------------------------------------------------------------------------------------------------------------ 255 ROBERTS22 WFPC2 IMAGE WF4 F606W, CLOCKS=YES,CR-TOLERANCE=0.0, 1 800 S POLQ CR-SPLIT=0.5,ATD-GAIN=7 ------------------------------------------------------------------------------------------------------------------------------------ 6816( 5) - 01/23/97 17:22 - [ 4] Visit: 03 Visit Requirements: 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 ------------------------------------------------------------------------------------------------------------------------------------ 320 FROSTYLEO WFPC2 IMAGE WF3 F606W CLOCKS=YES,ATD-GAIN=7 1 400 S ------------------------------------------------------------------------------------------------------------------------------------ 325 FROSTYLEO WFPC2 IMAGE WF3 F606W CLOCKS=YES,ATD-GAIN=7 1 500 S ------------------------------------------------------------------------------------------------------------------------------------ 330 FROSTYLEO WFPC2 IMAGE WF3 F606W, CLOCKS=YES,ATD-GAIN=7 1 400 S POLQ ------------------------------------------------------------------------------------------------------------------------------------ 335 FROSTYLEO WFPC2 IMAGE WF3 F606W, CLOCKS=YES,ATD-GAIN=7 1 500 S POLQ ------------------------------------------------------------------------------------------------------------------------------------ 340 FROSTYLEO WFPC2 IMAGE WF2 F606W, CLOCKS=YES,ATD-GAIN=7 1 500 S POLQ ------------------------------------------------------------------------------------------------------------------------------------ 345 FROSTYLEO WFPC2 IMAGE WF2 F606W, CLOCKS=YES,ATD-GAIN=7 1 500 S POLQ ------------------------------------------------------------------------------------------------------------------------------------ 350 FROSTYLEO WFPC2 IMAGE WF4 F606W, CLOCKS=YES,ATD-GAIN=7 1 500 S POLQ ------------------------------------------------------------------------------------------------------------------------------------ 355 FROSTYLEO WFPC2 IMAGE WF4 F606W, CLOCKS=YES,ATD-GAIN=7 1 400 S POLQ ------------------------------------------------------------------------------------------------------------------------------------ 6816( 5) - 01/23/97 17:22 - [ 5] Summary Form for Proposal 6816 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Configurations WFPC2 ------------------------------------------------------------------------------------------------------------------------------------ Opmodes IMAGE ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters CLOCKS=YES CR-TOLERANCE=0.0 CR-SPLIT=0.5 ATD-GAIN=7 ------------------------------------------------------------------------------------------------------------------------------------ Proposal Category GO ------------------------------------------------------------------------------------------------------------------------------------ Scientific Category INTERSTELLAR MEDIUM ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements CVZ ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F656N F673N F606W F606W,POLQ ------------------------------------------------------------------------------------------------------------------------------------ Target Names HEN401 ROBERTS22 FROSTYLEO ------------------------------------------------------------------------------------------------------------------------------------