5855( 0) - 07/18/95 18:19 - [ 1] PROPOSAL FOR HUBBLE SPACE TELESCOPE OBSERVATIONS ST ScI Use Only ID: 5855 Version: ********** Check-in Date: ********** 1.Proposal Title: Boron in Li- And Be- Deficient F Stars, A Key Discriminator of Stellar Evolution Scenarios ------------------------------------------------------------------------------------ 2. Scientific Category 3. Proposal For 4. Cycle Cool Stars GO 5 ------------------------------------------------------------------------------------ 5. Investigators Contact? PI: Ann Boesgaard University of Hawaii CoI: David Lambert University of Texas N CoI: Constantine Deliyannis Yale University N ------------------------------------------------------------------------------------ 6. Abstract The surprising discovery that F stars in a narrow T_ eff range of only a few hundred degrees can be severely depleted in their surface Li abundance (a Li "dip") signals a fundamental failure of standard stellar evolution theory. Numerous physical mechanisms have been proposed to explain this dip, including microscopic diffusion, mass loss, meridional circulation, and rotationally-induced mixing driven by angular momentum loss. Identifying which of these (if any) might really be at work is not only of vital interest to stellar evolution theory, but also to cosmology. (For example, diffusion may lower age estimates for globular clusters, and rotationally-induced mixing suggests that the standard model of big bang nucleosynthesis may be incomplete.) B thus joins Li and Be as a crucial probe of stellar structure and discriminator of viable physical mechanisms, as the most powerful constraints are obtained when all three elements are considered simultaneously. B will be observed in ten stars, both solar metallicity and old disk (since depletion is metallicity dependent), five that are extremely deficient in Li and Be, four that are moderately so, and one that is Li- and Be- normal. We have extensive observational and theoretical experience using Li and Be (and have had CYCLE2 time to use B) as probes of stellar structure; supporting ground based observations of Li and Be have been (and continue to be) obtained, including from Keck/HIRES. ------------------------------------------------------------------------------------ 5855( 0) - 07/18/95 18:19 - [ 2] Observations Description ------------------------ In determining the B abundance four options are available : ECH-B or G270M at 2497 A, and ECH-B or G200M at 2090 A. For the typical F dwarf the relative count rates per pixel of the four options are ECH-B at 2497 A = 1.0 ECH-B at 2090 A = 1.1 G270M at 2497 A = 13.0 G200M at 2090 A = 2.4 Our experience with spectra at 2497 A shows that a S/N = 60 - 100 is needed. While ECH-B is always desired, G270M (or G200M) is useful (Figure 2). In estimating the count rates, we have taken fluxes from the IUE Spectral Atlas for a program star or estimated the flux from a star of the same spectral type taking account of the differences in the V magnitudes. The recipe was checked against our GTO observations of Procyon, Theta UMa, and Iota Peg. A single GHRS observation will be made of each star (below); all long exposures will be broken into subexposures as is recommended. ONE OF OUR TARGETS IS IN THE CONTINUOUS VIEWING ZONE. We can thus observe it in one orbit rather than two. We will observe the following sharp-lined stars (in one orbit each): 1. Zeta Her A with ECH-B at 2497 A, Theta Cyg and Sigma Boo (metal poor) with G270M at 2497 A, for B in stars with only upper limits to Be (and thus extremely deficient Be). 2. HR 244 with ECH-B at 2497 A, and HR 962 with G270M at 2497 A, for B in stars with barely detected (and significantly deficient) Be at two different abundance levels. 3. HR 235 with G270M at 2497 A, for B in a Li- and Be- normal star, as a standard. Real Time Justification ----------------------- none Calibration Justification ------------------------- Additional Comments ------------------- We were awarded only 6 out of 13 orbits requested during Phase I, and the original submission of the Phase II proposal was for 6 orbits. However, Lambert wished to donate some orbits out of his GTO time to this project so we could observe our complete target list. This was approved by Melissa McGrath in her email dated 16-Marc-1995. This final Phase II proposal is for a total of 11 orbits, so 5 orbits have been taken from Lambert's GTO time. ------------------------------------------------------------------------------------ Data Distribution Media: 8MM Blocking Factor: 10 Ship To: PI_Address Ship Via: UPS Email: , ------------------------------------------------------------------------------------ 5855( 0) - 07/18/95 18:19 - [ 3] TARGET LIST a) Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 HD4813 STAR, F3-F9 RA = 00H 50M 07.60S +/- 0.02", J2000 V = +8 V = 5.19 +/- 0.01 DEC = -10D 38' 39.5" +/- 0.02" TYPE = F7IV-V B-V = 0.50 +/- 0.01 E(B-V) = 0.0 +/- 0.02 U-B = -0.02 +/- 0.01 Epoch of Position RA proper motion (seconds of time/yr) DEC Proper Motion (arcsec/yr) Annual Parallax (arcsec) J2000 -0.0153 -0.229 0.065 2 HD5015 STAR, F3-F9 RA = 00H 53M 04.200S +/- 0.09", J2000 V = +21 V = 4.82 +/- 0.01 DEC = +61D 07' 26.47" +/- 0.1" TYPE = F8V B-V = 0.53 +/- 0.01 E(B-V) = 0.0 +/- 0.02 U-B = 0.12 +/- 0.01 Epoch of Position RA proper motion (seconds of time/yr) DEC Proper Motion (arcsec/yr) Annual Parallax (arcsec) J2000 -0.0087 0.174 0.066 3 HD19994 STAR, F3-F9 RA = 03H 12M 46.439S +/- 0.01S, J2000 V = +18 V = 5.06 +/- 0.01 DEC = -01D 11' 45.88" +/- 0.02" TYPE = F8V B-V = 0.57 +/- 0.01 E(B-V) = 0.0 +/- 0.02 U-B = 0.12 +/- 0.01 Epoch of Position RA proper motion (seconds of time/yr) DEC Proper Motion (arcsec/yr) Annual Parallax (arcsec) J2000 0.0131 -0.067 0.057 4 HD128167 STAR, F0-F2 RA = 14H 34M 40.82S +/- 0.1S, J2000 V = +0 V = 4.46 +/- 0.01 DEC = 29D 44' 42.46" +/- 0.02" TYPE = F2V B-V = 0.36 +/- 0.01 E(B-V) = 0.0 +/- 0.02 U-B = -0.08 +/- 0.01 Epoch of Position RA proper motion (seconds of time/yr) DEC Proper Motion (arcsec/yr) Annual Parallax (arcsec) J2000 0.0145 0.132 0.068 5 HD150680 STAR, F3-F9 RA = 16H 41M 17.071S +/- 0.13", J2000 V = -70 V = 2.81 +/- 0.01 DEC = +31D 36' 10.14" +/- 0.13" TYPE = G0IV B-V = 0.65 +/- 0.01 E(B-V) = 0.0 +/- 0.02 U-B = +0.21 +/- 0.01 Epoch of Position RA proper motion (seconds of time/yr) DEC Proper Motion (arcsec/yr) Annual Parallax (arcsec) J2000 -0.0396 0.382 0.102 6 HD185395 STAR, F3-F9 RA = 19H 36M 26.496S +/- 0.1S, J2000 V = -28 V = 4.48 +/- 0.01 DEC = +50D 13' 15.8" +/- 0.02" TYPE = F4V B-V = 0.38 +/- 0.01 E(B-V) = 0.0 +/- 0.02 U-B = -0.03 +/- 0.01 Epoch of Position RA proper motion (seconds of time/yr) DEC Proper Motion (arcsec/yr) Annual Parallax (arcsec) J2000 -0.0018 0.257 0.056 7 HD61421 STAR, F3-F9 RA = 07H 39M 18.11S +/- 0.01S, J2000 V = -3 V = 0.38 +/- 0.01 DEC = +5D 13' 30.1" +/- 0.05" TYPE = F5IV B-V = 0.42 +/- 0.01 E(B-V) = 0.0 +/- 0.02 U-B = 0.02 +/- 0.01 5855( 0) - 07/18/95 18:19 - [ 4] TARGET LIST a) Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ Epoch of Position RA proper motion (seconds of time/yr) DEC Proper Motion (arcsec/yr) Annual Parallax (arcsec) J2000 -0.0475 -1.023 0.292 8 HD101606 STAR, F3-F9 RA = 11H 41M 34.26S +/- 0.09", J2000 V = +32 V = 5.73 +/- 0.01 DEC = +31D 44' 45.5" +/- 0.09" TYPE = F4V B-V = 0.43 +/- 0.01 E(B-V) = 0.0 +/- 0.02 U-B = -0.07 +/- 0.01 Epoch of Position RA proper motion (seconds of time/yr) DEC Proper Motion (arcsec/yr) Annual Parallax (arcsec) J2000 -0.0274 0.021 0.026 9 HD159332 STAR, F3-F9 RA = 17H 33M 22.82S +/- 0.03", J2000 V = -59 V = 5.64 +/- 0.01 DEC = +19D 15' 24.0" +/- 0.04" TYPE = F6V B-V = 0.48 +/- 0.01 E(B-V) = 0.0 +/- 0.02 U-B = -0.02 +/- 0.01 Epoch of Position RA proper motion (seconds of time/yr) DEC Proper Motion (arcsec/yr) Annual Parallax (arcsec) J2000 -0.0021 -0.090 0.032 10 HD216385 STAR, F3-F9 RA = 22H 52M 24.08S +/- 0.03", J2000 V = +12 V = 5.16 +/- 0.01 DEC = +9D 50' 08.4" +/- 0.03" TYPE = F7IV B-V = 0.48 +/- 0.01 E(B-V) = 0.0 +/- 0.02 U-B = -0.01 +/- 0.01 Epoch of Position RA proper motion (seconds of time/yr) DEC Proper Motion (arcsec/yr) Annual Parallax (arcsec) J2000 0.0353 0.044 0.043 5855( 0) - 07/18/95 18:19 - [ 5] Visit: 01 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 ------------------------------------------------------------------------------------------------------------------------------------ 10 HD4813 HRS ACQ 2.0 MIRROR-N2 BRIGHT=RETURN, 1 1.8S ONBOARD ACQ FOR 11 SEARCH-SIZE=3 Comments: STEP-TIME=0.2S ------------------------------------------------------------------------------------------------------------------------------------ 11 HD4813 HRS ACQ/PEA 0.25 MIRROR-N2 1 5S ONBOARD ACQ FOR 12 KUP Comments: STEP-TIME=0.2S ------------------------------------------------------------------------------------------------------------------------------------ 12 HD4813 HRS ACCUM 0.25 G270M 2497.0 STEP-PATT=DEF, 1 870S FP-SPLIT=STD, COMB=FOUR, DOPPLER=DEF ------------------------------------------------------------------------------------------------------------------------------------ 5855( 0) - 07/18/95 18:19 - [ 6] 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 ------------------------------------------------------------------------------------------------------------------------------------ 20 HD5015 HRS ACQ 2.0 MIRROR-N2 BRIGHT=RETURN, 1 1.8S ONBOARD ACQ FOR 21 SEARCH-SIZE=3 Comments: STEP-TIME=0.2S ------------------------------------------------------------------------------------------------------------------------------------ 21 HD5015 HRS ACQ/PEA 0.25 MIRROR-N2 1 5S ONBOARD ACQ FOR 22 KUP Comments: STEP-TIME=0.2S ------------------------------------------------------------------------------------------------------------------------------------ 22 HD5015 HRS ACCUM 0.25 ECH-B 2497.0 STEP-PATT=DEF, 2 1716S FP-SPLIT=STD, COMB=FOUR, DOPPLER=DEF ------------------------------------------------------------------------------------------------------------------------------------ 5855( 0) - 07/18/95 18:19 - [ 7] 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 ------------------------------------------------------------------------------------------------------------------------------------ 30 HD19994 HRS ACQ 2.0 MIRROR-N2 BRIGHT=RETURN, 1 1.8S ONBOARD ACQ FOR 31 SEARCH-SIZE=3 Comments: STEP-TIME=0.2S ------------------------------------------------------------------------------------------------------------------------------------ 31 HD19994 HRS ACQ/PEA 0.25 MIRROR-N2 1 5S ONBOARD ACQ FOR 32 KUP Comments: STEP-TIME=0.2S ------------------------------------------------------------------------------------------------------------------------------------ 32 HD19994 HRS ACCUM 0.25 G270M 2497.0 STEP-PATT=DEF, 1 870S FP-SPLIT=STD, COMB=FOUR, DOPPLER=DEF ------------------------------------------------------------------------------------------------------------------------------------ 5855( 0) - 07/18/95 18:19 - [ 8] Visit: 04 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 ------------------------------------------------------------------------------------------------------------------------------------ 40 HD128167 HRS ACQ 2.0 MIRROR-N2 BRIGHT=RETURN, 1 1.8S ONBOARD ACQ FOR 41 SEARCH-SIZE=3 Comments: STEP-TIME=0.2S ------------------------------------------------------------------------------------------------------------------------------------ 41 HD128167 HRS ACQ/PEA 0.25 MIRROR-N2 1 5S ONBOARD ACQ FOR 42 KUP Comments: STEP-TIME=0.2S ------------------------------------------------------------------------------------------------------------------------------------ 42 HD128167 HRS ACCUM 0.25 G270M 2497.0 STEP-PATT=DEF, 1 894S FP-SPLIT=STD, COMB=FOUR, DOPPLER=DEF ------------------------------------------------------------------------------------------------------------------------------------ 5855( 0) - 07/18/95 18:19 - [ 9] Visit: 05 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 ------------------------------------------------------------------------------------------------------------------------------------ 50 HD150680 HRS ACQ 2.0 MIRROR-N2 BRIGHT=RETURN, 1 1.8S ONBOARD ACQ FOR 51 SEARCH-SIZE=3 Comments: STEP-TIME=0.2S ------------------------------------------------------------------------------------------------------------------------------------ 51 HD150680 HRS ACQ/PEA 0.25 MIRROR-N2 1 5S ONBOARD ACQ FOR 52 KUP Comments: STEP-TIME=0.2S ------------------------------------------------------------------------------------------------------------------------------------ 52 HD150680 HRS ACCUM 0.25 ECH-B 2497.0 STEP-PATT=DEF, 1 835.8S FP-SPLIT=STD, COMB=FOUR, DOPPLER=DEF ------------------------------------------------------------------------------------------------------------------------------------ 5855( 0) - 07/18/95 18:19 - [ 10] Visit: 06 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 ------------------------------------------------------------------------------------------------------------------------------------ 60 HD185395 HRS ACQ 2.0 MIRROR-N2 BRIGHT=RETURN, 1 1.8S ONBOARD ACQ FOR 61 SEARCH-SIZE=3 Comments: STEP-TIME=0.2S ------------------------------------------------------------------------------------------------------------------------------------ 61 HD185395 HRS ACQ/PEA 0.25 MIRROR-N2 1 5S ONBOARD ACQ FOR 62 KUP Comments: STEP-TIME=0.2S ------------------------------------------------------------------------------------------------------------------------------------ 62 HD185395 HRS ACCUM 0.25 G270M 2497.0 STEP-PATT=DEF, 1 1081.8S FP-SPLIT=STD, COMB=FOUR, DOPPLER=DEF ------------------------------------------------------------------------------------------------------------------------------------ 5855( 0) - 07/18/95 18:19 - [ 11] Visit: 07 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 ------------------------------------------------------------------------------------------------------------------------------------ 70 HD61421 HRS ACQ 2.0 MIRROR-A2 BRIGHT=RETURN, 1 1.8S ONBOARD ACQ FOR 71 SEARCH-SIZE=3 Comments: STEP-TIME=0.2S ------------------------------------------------------------------------------------------------------------------------------------ 71 HD61421 HRS ACQ/PEA 0.25 MIRROR-A2 1 5S END ORBIT; ONBOARD ACQ FOR 72-73 KUP Comments: STEP-TIME=0.2S ------------------------------------------------------------------------------------------------------------------------------------ 72 WAVE HRS ACCUM SC2 ECH-B 2089.3 SPYBAL=YES 1 27.2S SEQ 72-73 NON-INT Comments: STEP-TIME=0.2S,SPYBAL should be done before this WAVE ------------------------------------------------------------------------------------------------------------------------------------ 73 HD61421 HRS ACCUM 0.25 ECH-B 2089.3 SPYBAL=NO, STEP 4 552S -PATT=DEF, FP- SPLIT=STD, COMB=FOUR, DOPPLER=DEF ------------------------------------------------------------------------------------------------------------------------------------ 5855( 0) - 07/18/95 18:19 - [ 12] Visit: 08 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 ------------------------------------------------------------------------------------------------------------------------------------ 80 HD101606 HRS ACQ 2.0 MIRROR-N2 BRIGHT=RETURN, 1 1.8S ONBOARD ACQ FOR 81 SEARCH-SIZE=3 Comments: STEP-TIME=0.2S ------------------------------------------------------------------------------------------------------------------------------------ 81 HD101606 HRS ACQ/PEA 0.25 MIRROR-N2 1 5S ONBOARD ACQ FOR 82 KUP Comments: STEP-TIME=0.2S ------------------------------------------------------------------------------------------------------------------------------------ 82 HD101606 HRS ACCUM 0.25 G270M 2497.0 STEP-PATT=DEF, 1 915S FP-SPLIT=STD, COMB=FOUR, DOPPLER=DEF ------------------------------------------------------------------------------------------------------------------------------------ 5855( 0) - 07/18/95 18:19 - [ 13] Visit: 09 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 ------------------------------------------------------------------------------------------------------------------------------------ 90 HD159332 HRS ACQ 2.0 MIRROR-N2 BRIGHT=RETURN, 1 1.8S ONBOARD ACQ FOR 91 SEARCH-SIZE=3 Comments: STEP-TIME=0.2S ------------------------------------------------------------------------------------------------------------------------------------ 91 HD159332 HRS ACQ/PEA 0.25 MIRROR-N2 1 5S ONBOARD ACQ FOR 92 KUP Comments: STEP-TIME=0.2S ------------------------------------------------------------------------------------------------------------------------------------ 92 HD159332 HRS ACCUM 0.25 G270M 2497.0 STEP-PATT=DEF, 1 868.2S FP-SPLIT=STD, COMB=FOUR, DOPPLER=DEF ------------------------------------------------------------------------------------------------------------------------------------ 5855( 0) - 07/18/95 18:19 - [ 14] Visit: 10 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 ------------------------------------------------------------------------------------------------------------------------------------ 100 HD216385 HRS ACQ 2.0 MIRROR-N2 BRIGHT=RETURN, 1 1.8S ONBOARD ACQ FOR 101 SEARCH-SIZE=3 Comments: STEP-TIME=0.2S ------------------------------------------------------------------------------------------------------------------------------------ 101 HD216385 HRS ACQ/PEA 0.25 MIRROR-N2 1 5S ONBOARD ACQ FOR 102 KUP Comments: STEP-TIME=0.2S ------------------------------------------------------------------------------------------------------------------------------------ 102 HD216385 HRS ACCUM 0.25 G270M 2497.0 STEP-PATT=DEF, 1 870S FP-SPLIT=STD, COMB=FOUR, DOPPLER=DEF ------------------------------------------------------------------------------------------------------------------------------------ 5855( 0) - 07/18/95 18:19 - [ 15] Summary Form for Proposal 5855 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Configurations HRS ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACQ ACQ/PEAKUP ACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters BRIGHT=RETURN SEARCH-SIZE=3 DOPPLER=DEF COMB=FOUR FP-SPLIT=STD STEP-PATT=DEF SPYBAL=YES SPYBAL=NO ------------------------------------------------------------------------------------------------------------------------------------ Proposal Category GO ------------------------------------------------------------------------------------------------------------------------------------ Scientific Category Cool Stars ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements ONBOARD ACQ FOR 11 ONBOARD ACQ FOR 12 CVZ ONBOARD ACQ FOR 21 ONBOARD ACQ FOR 22 ONBOARD ACQ FOR 31 ONBOARD ACQ FOR 32 ONBOARD ACQ FOR 41 ONBOARD ACQ FOR 42 ONBOARD ACQ FOR 51 ONBOARD ACQ FOR 52 ONBOARD ACQ FOR 61 ONBOARD ACQ FOR 62 ONBOARD ACQ FOR 71 END ORBIT; ONBOARD ACQ FOR 72-73 SEQ 72-73 NON-INT ONBOARD ACQ FOR 81 ONBOARD ACQ FOR 82 ONBOARD ACQ FOR 91 ONBOARD ACQ FOR 92 ONBOARD ACQ FOR 101 ONBOARD ACQ FOR 102 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements MIRROR-N2 G270M ECH-B MIRROR-A2 ------------------------------------------------------------------------------------------------------------------------------------ Target Names HD4813 HD5015 HD19994 HD128167 HD150680 HD185395 HD61421 WAVE HD101606 HD159332 HD216385 ------------------------------------------------------------------------------------------------------------------------------------