Page 1 PROPOSAL FOR HUBBLE SPACE TELESCOPE OBSERVATIONS ST ScI Use Only ID 4046c Report Date: 09-May-96:19:07 Version: ********** Check-in Date: ********** 1.Proposal Title: HIGHLY EVOLVED STARS OF LOW MASS - CYCLE 1 ------------------------------------------------------------------------------------ 2. Scientific Category 3. Proposal For 4. Proposal Type 5. Continuation ID STELLAR ASTROPHYSICS GTO/HRS 1212 Sub Category ------------------------------------------------------------------------------------ 6. Principal Investigator Institution Country Telephone Sara R. Heap NASA, GODDARD SPACE FLIGHT C USA 301-286-5359 ------------------------------------------------------------------------------------ 7. Abstract I propose to use the HRS to study highly evolved stars, particularly the central stars of planetary nebulae. The study includes (1) an attempt to detect and measure the flux from extremely hot stars (T>150,000 K), (2) an investigation of hydrogen and carbon-rich central stars and their recent ejecta, (3) an investigation of the interaction of the wind from a central star with the surrounding nebula, and (4) follow-up spectroscopic studies of uv-bright stars discovered in globular clusters. ------------------------------------------------------------------------------------ 8. Scientific Key Words: PLANETARY NEBULAE, PLANETARY NUCLEI ------------------------------------------------------------------------------------ 9. Est obs time (hours) pri: 0.65 par: 0 10. Num targs pri: 1 par: 0 ------------------------------------------------------------------------------------ 11. Instruments requested: HRS ------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------ Page 2 I. GENERAL FORM Proposal 4046c PI: Sara R. Heap Proposal Title: HIGHLY EVOLVED STARS OF LOW MASS - CYCLE 1 ------------------------------------------------------------------------------------ 1. Proposers: Proposers Institution Country ESA ------------------------------------------------------------------------------------ J. P. Harrington MARYLAND, UNIVERSITY OF USA Sara R. Heap NASA, GODDARD SPACE FLIGHT USA CENTER ------------------------------------------------------------------------------------ 3. Description of proposed observations. Cycle 0: PC images of NGC 2440 continuum and nebula (He II and H-beta). Lines 94.000-94.002. Cycle 1: NGC 7027 and NGC2392 (central star and bipolar jet). Lines 200-214. ------------------------------------------------------------------------------------ 4. Justification of need for HST observations. The resonance lines of the most abundant ions in the stellar atmosphere and in the nebula are in the ultraviolet. High-dispersion spectra of these lines help to define the physical properties, abundances, kinematics, etc. For some programs, pictures at high spatial resolution are also necessary to determine the nebular radius or to detect clots of nebular material. ------------------------------------------------------------------------------------ 5. Description of special scheduling requirements. No special scheduling requirements are expected. ------------------------------------------------------------------------------------ 6. Description of special calibration exposures. Target 1 is very faint. Observations of this objects should be carried out only in low-dark periods. ------------------------------------------------------------------------------------ 7. Data reduction and analysis plans. HOT-STAR: Extract stellar contribution to the total flux. Determine stellar far- uv flux below Lyman alpha. Deduce stellar temperature and lower limit to stellar mass. C-RICH: Measure velocity and column density of each component of a nebular spectral line. Derive nebular abundances and physical properties. WIND-NEB: Measure velocity and column density of each component of a nebular line. Deduce physical picture of the region where the wind interacts with the nebula. NPN-GC: Determine stellar contribution to observed flux. Estimate continuum temperature of star. Use spectral features to deduce stellar properties. ------------------------------------------------------------------------------------ 13. We propose to study central stars of planetary nebulae, particularly (1) the extremely hot stars, (2) the carbon-rich stars and nebulae, (3) stars with strong winds that interact with the surrounding nebulae, and (4) uv-bright stars that will be discovered in globular clusters. ------------------------------------------------------------------------------------ 11. Address Information Name: SARA R. HEAP Category: PI Institution: NASA, GODDARD SPACE FLIGHT CENTER Address: CODE 681 City: GREENBELT State: MD Zip Code: 20771 Country: USA Telephone: 301-286-5359 Telex (or e-mail): ------------------------------------------------------------------------------------ TARGET LIST a) Fixed Targets ID = 4046c [ 3] ------------------------------------------------------------------------------------------------------------------------------------ 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial |Acqui|FLX| Flux data No | Name | Description | Position |Eqnx | Vel. |Prblm|REF| | | | | | | | | ------------------------------------------------------------------------------------------------------------------------------------ 1 BD+75D325 PHOTOMETRIC STANDARD RA = 8H 10M 49.31S +/- 0.5S, 2000 1 V = 9.54,TYPE=SD0 GSC4380-2196 DEC = +74D 57' 57.5" +/- 2 B-V=0.37 0.5", PLATE-ID=00LQ Epoch of Position RA proper motion (seconds of time/yr) DEC Proper Motion (arcsec/yr) Annual Parallax (arcsec) B 1983.80 -0.0005 +/- 0.0004 0.0120 +/- 0.0100 0.0000 +/- 0.0000 ------------------------------------------------------------------------------------------------------------------------------------ EXPOSURE LOGSHEET ID = 4046c [ 4] ------------------------------------------------------------------------------------------------------------------------------------ 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |10 | 11 | 12 |13 |14| 15 ------------------------------------------------------------------------------------------------------------------------------------ Line | Seq | Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | S/N |Flx|Pr| Special Number | Name | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| |Rel. Time|Ref| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 10 BD+75D325 HRS ACQ 2.0 MIRROR-A2 FAINT=2000 1 289S 1 1 CYCLE 1 / 10.0- MAP=END-POINT 110.0 SEARCH-SIZE=5 ONBOARD ACQ FOR LOCATE=YES 20.0 SEQ 10.0-110.0 NO GAP ------------------------------------------------------------------------------------------------------------------------------------ 20 BD+75D325 HRS ACQ/ 2.0 MIRROR-A2 1 73.6S 1 1 ONBOARD ACQ FOR PEAKUP 25.0-110.0 Comments: CENTER IN LSA AFTER NEW DEFCAL STEP-TIME=1.6SEC ------------------------------------------------------------------------------------------------------------------------------------ 25 WAVE HRS ACCUM SC2 G160M 1234 STEP-PATT=5 1 30S 1 CALIB FOR 30 DOPPLER=OFF ------------------------------------------------------------------------------------------------------------------------------------ 30 BD+75D325 HRS ACCUM 0.25 G160M 1234 STEP-PATT=5 2 4.5M 1 FP-SPLIT=NO ------------------------------------------------------------------------------------------------------------------------------------ 35 WAVE HRS ACCUM SC2 G160M 1265 STEP-PATT=5 1 30S 1 CALIB FOR 40 DOPPLER=OFF ------------------------------------------------------------------------------------------------------------------------------------ 40 BD+75D325 HRS ACCUM 0.25 G160M 1265 STEP-PATT=5 2 4.5M 1 FP-SPLIT=NO ------------------------------------------------------------------------------------------------------------------------------------ 45 WAVE HRS ACCUM SC2 G160M 1295 STEP-PATT=5 1 30S 1 CALIB FOR 50 DOPPLER=OFF ------------------------------------------------------------------------------------------------------------------------------------ 50 BD+75D325 HRS ACCUM 0.25 G160M 1295 STEP-PATT=5 2 4.5M 1 FP-SPLIT=NO ------------------------------------------------------------------------------------------------------------------------------------ 55 WAVE HRS ACCUM SC2 G160M 1330 STEP-PATT=5 1 30S 1 CALIB FOR 60 DOPPLER=OFF ------------------------------------------------------------------------------------------------------------------------------------ 60 BD+75D325 HRS ACCUM 0.25 G160M 1330 STEP-PATT=5 2 4.5M 1 FP-SPLIT=NO ------------------------------------------------------------------------------------------------------------------------------------ 65 WAVE HRS ACCUM SC2 G160M 1360 STEP-PATT=5 1 30S 1 CALIB FOR 70 DOPPLER=OFF ------------------------------------------------------------------------------------------------------------------------------------ 70 BD+75D325 HRS ACCUM 0.25 G160M 1360 STEP-PATT=5 2 5.0M 1 FP-SPLIT=NO ------------------------------------------------------------------------------------------------------------------------------------ 75 WAVE HRS ACCUM SC2 G160M 1390 STEP-PATT=5 1 30S 1 CALIB FOR 80 DOPPLER=OFF ------------------------------------------------------------------------------------------------------------------------------------ 80 BD+75D325 HRS ACCUM 0.25 G160M 1390 STEP-PATT=5 3 220S 1 FP-SPLIT=NO ------------------------------------------------------------------------------------------------------------------------------------ 85 WAVE HRS ACCUM SC2 G160M 1420 STEP-PATT=5 1 30S 1 CALIB FOR 90 DOPPLER=OFF ------------------------------------------------------------------------------------------------------------------------------------ EXPOSURE LOGSHEET ID = 4046c [ 5] ------------------------------------------------------------------------------------------------------------------------------------ 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |10 | 11 | 12 |13 |14| 15 ------------------------------------------------------------------------------------------------------------------------------------ Line | Seq | Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | S/N |Flx|Pr| Special Number | Name | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| |Rel. Time|Ref| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 90 BD+75D325 HRS ACCUM 0.25 G160M 1420 STEP-PATT=5 3 4.0M 1 FP-SPLIT=NO ------------------------------------------------------------------------------------------------------------------------------------ 95 WAVE HRS ACCUM SC2 G160M 1450 STEP-PATT=5 1 30S 1 CALIB FOR 100 DOPPLER=OFF ------------------------------------------------------------------------------------------------------------------------------------ 100 BD+75D325 HRS ACCUM 0.25 G160M 1450 STEP-PATT=5 3 4.0M 1 FP-SPLIT=NO ------------------------------------------------------------------------------------------------------------------------------------ 105 WAVE HRS ACCUM SC2 G160M 1550 STEP-PATT=5 1 30S 1 CALIB FOR 110 DOPPLER=OFF ------------------------------------------------------------------------------------------------------------------------------------ 110 BD+75D325 HRS ACCUM 0.25 G160M 1550 STEP-PATT=5 3 4.0M 1 FP-SPLIT=NO ------------------------------------------------------------------------------------------------------------------------------------ Summary Form for Proposal 4046c [ 6] Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Configurations HRS ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACQ ACQ/PEAKUP ACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters FAINT=2000 MAP=END-POINT SEARCH-SIZE=5 LOCATE=YES STEP-PATT=5 DOPPLER=OFF FP-SPLIT=NO ------------------------------------------------------------------------------------------------------------------------------------ Proposal for GTO/HRS ------------------------------------------------------------------------------------------------------------------------------------ S/C Hours 0.65 ------------------------------------------------------------------------------------------------------------------------------------ Scientific Category STELLAR ASTROPHYSICS ------------------------------------------------------------------------------------------------------------------------------------ Scientific Sub-category ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements CYCLE 1 / 10.0-110.0; ONBOARD ACQ FOR 20.0; SEQ 10.0-110.0 NO GAP ONBOARD ACQ FOR 25.0-110.0 CALIB FOR 30 CALIB FOR 40 CALIB FOR 50 CALIB FOR 60 CALIB FOR 70 CALIB FOR 80 CALIB FOR 90 CALIB FOR 100 CALIB FOR 110 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements MIRROR-A2 G160M ------------------------------------------------------------------------------------------------------------------------------------ Target Names BD+75D325 GSC4380-2196 ------------------------------------------------------------------------------------------------------------------------------------