10704( 1) - 05/02/05 10:46 - [ 1] PROPOSAL FOR HUBBLE SPACE TELESCOPE OBSERVATIONS ST ScI Use Only ID: 10704 Version: 1 Check-in Date: 02-May-2005 14:45:08 1.Proposal Title: Astrometric Masses of Extrasolar Planets and Brown Dwarfs ------------------------------------------------------------------------------------ 2. Proposal For 3. Cycle 4. Parallel Pointing Tolerance GO 14 ------------------------------------------------------------------------------------ 5. Investigators Contact? PI: Dr. George Fritz Benedict University of Texas at Austin CoI: Ms. Barbara McArthur University of Texas at Austin N CoI: Dr. Edmund Nelan Space Telescope Science Institute N CoI: Dr. Geoff Marcy University of California - Berkeley N CoI: Dr. Debra Fischer San Francisco State University N CoI: Dr. Paul Butler Carnegie Institution of Washington N CoI: Dr. Artie Hatzes Thuringer Landessternwarte Tautenburg N (TLS) CoI: Dr. Thomas Harrison New Mexico State University N CoI: Dr. Richard J. Patterson The University of Virginia N ------------------------------------------------------------------------------------ 6. Abstract We propose observations with HST/FGS to estimate the astrometric elements (perturbation orbit semi-major axis and inclination) of extra-solar planets orbiting six stars. These companions were originally detected by radial velocity techniques. We have demonstrated that FGS astrometry of even a short segment of reflex motion, when combined with extensive radial velocity information, can yield useful inclination information (McArthur et al. 2004), allowing us to determine companion masses. Extrasolar planet masses assist in two ongoing research frontiers. First, they provide useful boundary conditions for models of planetary formation and evolution of planetary systems. Second, knowing that a star in fact has a plantary mass companion, increases the value of that system to future extrasolar planet observation missions such as SIM PlanetQuest, TPF, and GAIA. ------------------------------------------------------------------------------------ 10704( 1) - 05/02/05 10:46 - [ 2] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 2 HD47536 J2000 V = 5.26+/-0.01 3 HD136118 J2000 V = 6.94+/-0.02 4 HD168443 J2000 V = 6.92+/-0.02 5 HD145675 J2000 V = 6.67+/-0.02 6 HD38529 J2000 V = 5.94+/-0.02 7 HD33636 J2000 V = 7.06+/-0.02 10704( 1) - 05/02/05 10:46 - [ 3] Visit: 10 Visit Priority: Visit Requirements: PCS MODE FINE; BETWEEN 16-MAR-2004:22:23:02 AND 30-MAR-2004:22:23:02 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| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 HD202206 FGS POS 1 F583W 1 50 S ------------------------------------------------------------------------------------------------------------------------------------ 10704( 1) - 05/02/05 10:46 - [ 4] Summary Form for Proposal 10704 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures 1 ------------------------------------------------------------------------------------------------------------------------------------ Configurations FGS ------------------------------------------------------------------------------------------------------------------------------------ Opmodes POS ------------------------------------------------------------------------------------------------------------------------------------ Proposal Category GO ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements PCS MODE FINE; BETWEEN 16-MAR-2004 22 23 02 AND 30-MAR-2004 22 23 02 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F583W ------------------------------------------------------------------------------------------------------------------------------------ Target Names HD202206 ------------------------------------------------------------------------------------------------------------------------------------