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: <none>
Additional Comments: <none>
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: <none>
Additional Comments: <none>
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: <none>
On Hold Comments: <none>
Additional Comments: <none>
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
------------------------------------------------------------------------------------------------------------------------------------