15234( 13) - 09-May-2019 19:40:17 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 15234 Version: 13 Check-in Time: 09-May-2019 19:40:17 STScI Edit Number: 11 Title Collecting the Missing Piece of the Puzzle: The Wind Temperatures of Arcturus (K2 III) and Aldeberan (K5 III) ------------------------------------------------------------------------------------ Type Cycle GO 25 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. Graham M. Harper University of Colorado at Boulder Y CoI: Dr. Thomas R. Ayres University of Colorado at Boulder N ------------------------------------------------------------------------------------ Abstract Unravelling the poorly understood processes that drive mass loss from red giant stars requires that we empirically constrain the intimately coupled momentum and energy balance. Hubble high spectral resolution observations of wind scattered line profiles, from neutral and singly ionized species, have provided measures of wind acceleration, turbulence, terminal speeds, and mass-loss rates. These wind properties inform us about the force-momentum balance, however, the spectra have not yielded measures of the much needed wind temperatures, which constrain the energy balance. We proposed to remedy this omission with STIS E140H observations of the Si III 1206 Ang. resonance emission line for two of the best studied red giants: Arcturus (alpha Boo: K2 III) and Aldebaran (alpha Tau: K5 III), both of which have detailed semi-empirical wind velocity models. The relative optical depths of wind scattered absorption in Si III 1206 Ang., O I 1303 Ang. triplet., C II 1335 Ang., and existing Mg II h & k and Fe II profiles give the wind temperatures through the thermally controlled ionization balance. The new temperature constraints will be used to test existing semi-empirical models by comparision with multi-frequency JVLA radio fluxes, and also to constrain the flux-tube geometry and wave energy spectrum of magnetic wave-driven winds. ------------------------------------------------------------------------------------ Observations Description ------------------------ General: We have been awarded 10 orbits to observe 2 bright K giants at the Si III 1206 Angstrom emission line with the E140H setting. Additional emission line diagnostics lie shortward (C III 1175) and longward(O I 1303, C II 1335, and Si IV 1402) of this region. Both stars have been observed with HST and IUE in this region, and these spectra are used for the SCIENCE ETC calculations. Alpha Boo has 4 orbits allocated and alpha Tau, which is slightly fainter in the FUV, has 6 orbits. We schedule a single 4-orbit Visiit for alpha Boo (to avoid being too wasteful), and two 3-orbit Visits foir alpha Tau to aid scheduling. 15234( 13) - 09-May-2019 19:40:17 - [ 2] We are using 2 E140H settings: i1271 and i1307 to place the Si III 1206 line at different positions on the detector, and to capture as much additional spectra shortward and longward as possible. We request GO WAVE observations of 50 sec (for both setting) that are deeper than the default exposures. We use the 0.2x0.2 arcsec aperture for SCIENCE and WAVE observations. Details: ACQ: we acquire the target using the STIS/CCD woth the F25ND5 aperture as these stars are very bright in the optical: alpha Boo V=-0.05, alpha Tau=0.86. We use the Pickles K3 III (alpha Boo) and K5 III (alpha Tau) synthetic spectra for the ETC ACQ/PEAK: For both stars we use the STIS/CCD with the G430M at 3680 Ang. (alpha Boo) and 3960 Ang. (alpha Tau) with the 0.2x0.05ND apertture. SCIENCE: all science observations use the 0.2x0.2 arcsec aperture. We use 2 settings: i1271 and i1307 splitting the observing time approximately equally between the two. WAVE: we specify 50 sec exposures (with the 0.2x0.2 arcsec aperture). These are deeper than the defaults. Each Visit contains 2 WAVE exposures: one at the beginning of the Visit and one inserted during occultation before a following science observation. This occurs during the GS Reacq. ------------------------------------------------------------------------------------ 15234( 13) - 09-May-2019 19:40:17 - [ 3] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 3 HD124897 STAR, K III-I RA=14H15M39.6721S, J2000 V = -5.2 V = -0.05 +/- 0.1 DEC=+19D10'56.67" Reference Frame: ICRS Extended: NO Comments: This object was generated by the targetselector and retrieved from the SIMBAD database. Epoch of Position RA proper motion (seconds of time/yr) DEC Proper Motion (arcsec/yr) Annual Parallax (arcsec) 2000 -0.0771777858340191 -2.0 0.0888 ------------------------------------------------------------------------------------------------------------------------------------ 4 HD29139 STAR, K III-I RA=04H35M55.2391S, J2000 V = 54.3 V = 0.86 +/- 0.1 DEC=+16D30'33.49" Reference Frame: ICRS Extended: NO Comments: This object was generated by the targetselector and retrieved from the SIMBAD database. Epoch of Position RA proper motion (seconds of time/yr) DEC Proper Motion (arcsec/yr) Annual Parallax (arcsec) 2000 0.004411886146252058 -0.18894 0.0489 ------------------------------------------------------------------------------------------------------------------------------------ 15234( 13) - 09-May-2019 19:40:17 - [ 4] Visit: 01 (Alpha Boo (K2 III) 4-orbit Single Vist) Visit Requirements: On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 HD124897 STIS/CCD ACQ F25ND5 MIRROR 1 0.1 S (0.1 S) Comments: Pickles K3 III Model Global Count Rates Source only 445, 758.088 Time to Saturation = 1.57 sec ------------------------------------------------------------------------------------------------------------------------------------ 2 HD124897 STIS/CCD ACQ/PEA 0.2X0.05N G430M 3680 1 0.1 S (0.1 K D S) Comments: Pickles K3 III model Global Count Rates Source only 375, 515.122 s-1 ------------------------------------------------------------------------------------------------------------------------------------ 3 WAVE STIS/FUV ACCUM 0.2X0.2 E140H 1271 1 50 S (50 -MAMA S) Comments: deeper exposure for optimum wavcal solution ------------------------------------------------------------------------------------------------------------------------------------ 4 HD124897 STIS/FUV TIME-TA 0.2X0.2 E140H 1271 WAVECAL=NO, BUFFER-TIME=689.0 1 1600.0 S -MAMA G see below (1656 S) Comments: Exp approx Using the 4/5 buffer time rule. ------------------------------------------------------------------------------------------------------------------------------------ 5 WAVE STIS/FUV ACCUM 0.2X0.2 E140H 1271 1 50 S (50 -MAMA S) Comments: deeper than default exposure for optimum wavecl ------------------------------------------------------------------------------------------------------------------------------------ 6 HD124897 STIS/FUV TIME-TA 0.2X0.2 E140H 1271 BUFFER-TIME=690.0, WAVECAL=NO 1 2700.0 S -MAMA G see below (2964 S) Comments: using the 4/5 Buffer time rule ------------------------------------------------------------------------------------------------------------------------------------ 7 WAVE STIS/FUV ACCUM 0.2X0.2 E140H 1307 1 50 S (50 -MAMA S) Comments: deeper than default exposure for optimum wavecl ------------------------------------------------------------------------------------------------------------------------------------ 15234( 13) - 09-May-2019 19:40:17 - [ 5] Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 8 HD124897 STIS/FUV TIME-TA 0.2X0.2 E140H 1307 WAVECAL=NO, BUFFER-TIME=647.0 1 2800.0 S -MAMA G see below (2897 S) Comments: Using 4/5 buffer-time rule ------------------------------------------------------------------------------------------------------------------------------------ 9 HD124897 STIS/FUV TIME-TA 0.2X0.2 E140H 1307 WAVECAL=NO, BUFFER-TIME=647.0 1 2800. S -MAMA G see below (2964 S) ------------------------------------------------------------------------------------------------------------------------------------ 10 WAVE STIS/FUV ACCUM 0.2X0.2 E140H 1307 1 50 S (50 -MAMA S) Comments: Final wavecal during occultation ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ HD124897 1 STIS/CCD ACQ F25ND5 MIRROR none none none none 1 N/A HD124897 2 STIS/CCD ACQ/PEA 0.2X0.05 G430M 3680 none none none none 1 N/A K ND WAVE 3 STIS/FUV ACCUM 0.2X0.2 E140H 1271 none none none none 1 N/A -MAMA HD124897 4 STIS/FUV TIME-TA 0.2X0.2 E140H 1271 none none none none 1 1656.0 S -MAMA G WAVE 5 STIS/FUV ACCUM 0.2X0.2 E140H 1271 none none none none 2 N/A -MAMA HD124897 6 STIS/FUV TIME-TA 0.2X0.2 E140H 1271 none none none none 2 2964.0 S -MAMA G WAVE 7 STIS/FUV ACCUM 0.2X0.2 E140H 1307 none none none none 3 N/A -MAMA HD124897 8 STIS/FUV TIME-TA 0.2X0.2 E140H 1307 none none none none 3 2897.0 S -MAMA G HD124897 9 STIS/FUV TIME-TA 0.2X0.2 E140H 1307 none none none none 4 2964.0 S -MAMA G WAVE 10 STIS/FUV ACCUM 0.2X0.2 E140H 1307 none none none none 4 N/A -MAMA 15234( 13) - 09-May-2019 19:40:17 - [ 6] Visit: 02 (Alpha Tau (K5 III) First Visit) Visit Requirements: On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 HD29139 STIS/CCD ACQ F25ND5 MIRROR 1 0.1 S (0.1 S) Comments: Pickles K5 III model Global Count Rates Source only 257, 844.378 ------------------------------------------------------------------------------------------------------------------------------------ 2 WAVE STIS/FUV ACCUM 0.2X0.2 E140H 1307 1 50.0 S (50 -MAMA S) Comments: Deeper than defaul expsosure for optimum wavecal ------------------------------------------------------------------------------------------------------------------------------------ 3 HD29139 STIS/FUV TIME-TA 0.2X0.2 E140H 1307 WAVECAL=NO, BUFFER-TIME=1188.0 1 1500.0 S -MAMA G (1500 S) Comments: 4/5 buffer-time rule used ------------------------------------------------------------------------------------------------------------------------------------ 4 WAVE STIS/FUV ACCUM 0.2X0.2 E140H 1307 1 50.0 S (50 -MAMA S) ------------------------------------------------------------------------------------------------------------------------------------ 5 HD29139 STIS/FUV TIME-TA 0.2X0.2 E140H 1307 WAVECAL=NO, BUFFER-TIME=1188.0 1 2800.0 S -MAMA G (2800 S) Comments: Using 4/5 buffer-time rule ------------------------------------------------------------------------------------------------------------------------------------ 6 WAVE STIS/FUV ACCUM 0.2X0.2 E140H 1271 1 50.0 S (50 -MAMA S) Comments: Deeper than default exposure for optimum wavecal ------------------------------------------------------------------------------------------------------------------------------------ 7 HD29139 STIS/FUV TIME-TA 0.2X0.2 E140H 1271 WAVECAL=NO, BUFFER-TIME=1263.0 1 2500.0 S -MAMA G (2500 S) Comments: 4/5 buffer time rule applied ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ HD29139 1 STIS/CCD ACQ F25ND5 MIRROR none none none none 1 N/A WAVE 2 STIS/FUV ACCUM 0.2X0.2 E140H 1307 none none none none 1 N/A -MAMA 15234( 13) - 09-May-2019 19:40:17 - [ 7] Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ HD29139 3 STIS/FUV TIME-TA 0.2X0.2 E140H 1307 none none none none 1 N/A -MAMA G WAVE 4 STIS/FUV ACCUM 0.2X0.2 E140H 1307 none none none none 1 N/A -MAMA HD29139 5 STIS/FUV TIME-TA 0.2X0.2 E140H 1307 none none none none 2 N/A -MAMA G WAVE 6 STIS/FUV ACCUM 0.2X0.2 E140H 1271 none none none none 2 N/A -MAMA HD29139 7 STIS/FUV TIME-TA 0.2X0.2 E140H 1271 none none none none 3 N/A -MAMA G 15234( 13) - 09-May-2019 19:40:17 - [ 8] Visit: 03 (Alpha Tau (K5 III) Second Visit) Visit Requirements: On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 HD29139 STIS/CCD ACQ F25ND5 MIRROR 1 0.1 S (0.1 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 WAVE STIS/FUV ACCUM 0.2X0.2 E140H 1271 1 50.0 S (50 -MAMA S) Comments: Deeper than default exposure for optimum wavecal ------------------------------------------------------------------------------------------------------------------------------------ 3 HD29139 STIS/FUV TIME-TA 0.2X0.2 E140H 1271 WAVECAL=NO, BUFFER-TIME=1263.0 1 1500.0 S -MAMA G (1500 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 WAVE STIS/FUV ACCUM 0.2X0.2 E140H 1271 1 50.0 S (50 -MAMA S) Comments: Deeper than default exposure for optimum wavecal ------------------------------------------------------------------------------------------------------------------------------------ 5 HD29139 STIS/FUV TIME-TA 0.2X0.2 E140H 1271 WAVECAL=NO, BUFFER-TIME=1263.0 1 2824.0 S -MAMA G (2824 S) ------------------------------------------------------------------------------------------------------------------------------------ 6 WAVE STIS/FUV ACCUM 0.2X0.2 E140H 1307 1 50.0 S (50 -MAMA S) Comments: Deeper than default exposure for optimum wavecal ------------------------------------------------------------------------------------------------------------------------------------ 7 HD29139 STIS/FUV TIME-TA 0.2X0.2 E140H 1307 WAVECAL=NO, BUFFER-TIME=1188.0 1 2500.0 S -MAMA G (2500 S) ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ HD29139 1 STIS/CCD ACQ F25ND5 MIRROR none none none none 1 N/A WAVE 2 STIS/FUV ACCUM 0.2X0.2 E140H 1271 none none none none 1 N/A -MAMA HD29139 3 STIS/FUV TIME-TA 0.2X0.2 E140H 1271 none none none none 1 N/A -MAMA G WAVE 4 STIS/FUV ACCUM 0.2X0.2 E140H 1271 none none none none 1 N/A -MAMA HD29139 5 STIS/FUV TIME-TA 0.2X0.2 E140H 1271 none none none none 2 N/A -MAMA G 15234( 13) - 09-May-2019 19:40:17 - [ 9] Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ WAVE 6 STIS/FUV ACCUM 0.2X0.2 E140H 1307 none none none none 2 N/A -MAMA HD29139 7 STIS/FUV TIME-TA 0.2X0.2 E140H 1307 none none none none 3 N/A -MAMA G 15234( 13) - 09-May-2019 19:40:17 - [ 10] Visit: 51 (Alpha Boo (K2 III) 4-orbit Single Vist) Visit Requirements: On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 HD124897 STIS/CCD ACQ F25ND5 MIRROR 1 0.1 S (0.1 S) Comments: Pickles K3 III Model Global Count Rates Source only 445, 758.088 Time to Saturation = 1.57 sec ------------------------------------------------------------------------------------------------------------------------------------ 2 WAVE STIS/FUV ACCUM 0.2X0.2 E140H 1307 1 50 S (50 -MAMA S) Comments: deeper than default exposure for optimum wavecl ------------------------------------------------------------------------------------------------------------------------------------ 3 HD124897 STIS/FUV TIME-TA 0.2X0.2 E140H 1307 WAVECAL=NO, BUFFER-TIME=647.0 1 2800.0 S -MAMA G see below (2137 S) Comments: Using 4/5 buffer-time rule ------------------------------------------------------------------------------------------------------------------------------------ 4 HD124897 STIS/CCD ACQ F25ND5 MIRROR 1 0.1 S (0.1 S) ------------------------------------------------------------------------------------------------------------------------------------ 5 HD124897 STIS/FUV TIME-TA 0.2X0.2 E140H 1307 WAVECAL=NO, BUFFER-TIME=647.0 1 2800. S -MAMA G see below (2277 S) ------------------------------------------------------------------------------------------------------------------------------------ 6 WAVE STIS/FUV ACCUM 0.2X0.2 E140H 1307 1 50 S (50 -MAMA S) Comments: Final wavecal during occultation ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ HD124897 1 STIS/CCD ACQ F25ND5 MIRROR none none none none 1 N/A WAVE 2 STIS/FUV ACCUM 0.2X0.2 E140H 1307 none none none none 1 N/A -MAMA HD124897 3 STIS/FUV TIME-TA 0.2X0.2 E140H 1307 none none none none 1 2137.0 S -MAMA G HD124897 4 STIS/CCD ACQ F25ND5 MIRROR none none none none 2 N/A 15234( 13) - 09-May-2019 19:40:17 - [ 11] Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ HD124897 5 STIS/FUV TIME-TA 0.2X0.2 E140H 1307 none none none none 2 2277.0 S -MAMA G WAVE 6 STIS/FUV ACCUM 0.2X0.2 E140H 1307 none none none none 2 N/A -MAMA 15234( 13) - 09-May-2019 19:40:17 - [ 12] Summary Form for Proposal 15234 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures 0.2X0.05ND, 0.2X0.2, F25ND5 ------------------------------------------------------------------------------------------------------------------------------------ Configurations STIS/CCD, STIS/FUV-MAMA ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM, ACQ, ACQ/PEAK, TIME-TAG ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters BUFFER-TIME=1188.0, BUFFER-TIME=1263.0, BUFFER-TIME=647.0, BUFFER-TIME=689.0, BUFFER-TIME=690.0, WAVECAL=NO ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements E140H, G430M, MIRROR ------------------------------------------------------------------------------------------------------------------------------------ Target Names HD124897, HD29139, WAVE ------------------------------------------------------------------------------------------------------------------------------------