14713( 4) - 13-Sep-2016 17:57:17 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 14713 Version: 4 Check-in Time: 13-Sep-2016 17:57:17 STScI Edit Number: 0 Title Binarity and Accretion Activity in AGB Stars with Variable UV and X-Ray Emission ------------------------------------------------------------------------------------ Type Cycle GO 24 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. Raghvendra Sahai Jet Propulsion Laboratory Y CoI: Dr. Carmen Sanchez Contreras Centro de Astrobiologia (CSIC/INTA) Inst. N Nac. de Tec. Aero. CoI: Dr. Mark Claussen Associated Universities, Inc. N CoI: Prof. Chinnathambi Muthumariappan Indian Institute of Astrophysics N CoI: Dr. Jorge Sanz-Forcada Centro de Astrobiologia (CSIC/INTA) Inst. N Nac. de Tec. Aero. ------------------------------------------------------------------------------------ Abstract The dramatic changes in the geometry and dynamics of the mass-ejection during the AGB-to-PN transformation are widely believed to be due to binarity and associated accretion processes, but observational probes are lacking. We propose to obtain multi-epoch UV spectra of two late-spectral-type AGB stars, Y Gem and EY Hya, that belong to a newly-discovered class of AGB stars showing strong and variable FUV fluxes ("fuvAGB" stars) and hard X-ray emission -- suggestive of variable accretion of matter onto an accretion disk in a binary system. The companions are either low-mass main-sequence stars or cold white dwarfs. The proposed study will provide robust confirmation of, and constraints on, our accretion-activity model for these objects. Y Gem and EY Hya represent the two main observational paths taken during post-AGB (pAGB) evolution: one leading to preplanetary nebulae (PPN) and the other to disk-prominent pAGB objects (dpAGB). Both dpAGBs and PPNe possess dusty circumstellar disks/torii, but, unlike dpAGBs, PPNs also show prominent extended nebulosities. We will fit the continuum to derive the temperature and size of the accretion hot-spot, and using CLOUDY modelling, fit the emission lines to provide constraints on the physical parameters of the accreting flow. The line profiles, if resolved, will reveal the nature of the companion stars. Our study will probe the early formation phase of bound disks in binary AGB stars, and provide valuable insights into the binary-induced accretion processes that make such disks, which have long been theorized to drive collimated outflows that produce aspherical morphologies in post-AGB objects. ------------------------------------------------------------------------------------ Observations Description ------------------------ imaging survey of protoplanetary nebulae ------------------------------------------------------------------------------------ 14713( 4) - 13-Sep-2016 17:57:17 - [ 2] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 Y-GEM STAR, AGB STAR, DISK, RA=07H41M8.5227S +/- 0.01", J2000 V = 9.09 +/- 0.5 B=10.23, GALEX AB EMISSION LINE STAR, DEC=+20D25'44.34" +/- 0.01" (FUV=14-16, NUV=14-15.9) LONG PERIOD VARIABLE Reference Frame: ICRS Epoch of Position RA proper motion (seconds of time/yr) DEC Proper Motion (arcsec/yr) Annual Parallax (arcsec) 2000.0 -3.2653739202439E-4 -0.0083 0 ------------------------------------------------------------------------------------------------------------------------------------ 2 EY-HYA ISM, REFLECTION NEBULA RA=08H46M21.2085S +/- 0.01", J2000 V = 9.37 +/- 0.5 B=10.73, GALEX AB DEC=+01D37'56.03" +/- 0.01" (FUV=19.0, NUV=18.6) Reference Frame: ICRS Epoch of Position RA proper motion (seconds of time/yr) DEC Proper Motion (arcsec/yr) Annual Parallax (arcsec) 2000.0 -4.635214070779821E-4 -0.00621 0 ------------------------------------------------------------------------------------------------------------------------------------ 14713( 4) - 13-Sep-2016 17:57:17 - [ 3] Patterns ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 1 Primary_Pattern Secondary_Pattern Pattern_Type STIS-ALONG-SLIT Pattern_Purpose DITHER Number_Of_Points 2 Point_Spacing 0.0861 Line_Spacing Coordinate_Frame POS-TARG Pattern_Orient 90.0 Angle_Between_Sides Center_Pattern NO ------------------------------------------------------------------------------------------------------------------------------------ 14713( 4) - 13-Sep-2016 17:57:17 - [ 4] Visit: 01 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 Y-GEM STIS/CCD ACQ F25ND3 MIRROR 1 1 S (1 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 Y-GEM STIS/FUV TIME-TA 52X0.2 G140L 1425 BUFFER-TIME=166 1 300 S PATTERN 1 2 -MAMA G see below (694 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 Y-GEM STIS/NUV TIME-TA 52X0.2 G230L 2376 BUFFER-TIME=166 1 300 S PATTERN 1 3 -MAMA G see below (694 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 Y-GEM STIS/FUV TIME-TA 52X0.2 G140L 1425 BUFFER-TIME=166 1 300 S PATTERN 1 4 -MAMA G see below (1034 S) ------------------------------------------------------------------------------------------------------------------------------------ 5 Y-GEM STIS/NUV TIME-TA 52X0.2 G230L 2376 BUFFER-TIME=166 1 300 S PATTERN 1 5 -MAMA G see below (1034 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 | ------------------------------------------------------------------------------------------------------------------------------------ Y-GEM 1 STIS/CCD ACQ F25ND3 MIRROR none none none none 1 N/A Y-GEM 2 STIS/FUV TIME-TA 52X0.2 G140L 1425 1 none none none 1 347.0 S -MAMA G Y-GEM 2 STIS/FUV TIME-TA 52X0.2 G140L 1425 2 none none none 1 347.0 S -MAMA G Y-GEM 3 STIS/NUV TIME-TA 52X0.2 G230L 2376 1 none none none 1 347.0 S -MAMA G Y-GEM 3 STIS/NUV TIME-TA 52X0.2 G230L 2376 2 none none none 1 347.0 S -MAMA G Y-GEM 4 STIS/FUV TIME-TA 52X0.2 G140L 1425 1 none none none 2 517.0 S -MAMA G Y-GEM 4 STIS/FUV TIME-TA 52X0.2 G140L 1425 2 none none none 2 517.0 S -MAMA G Y-GEM 5 STIS/NUV TIME-TA 52X0.2 G230L 2376 1 none none none 2 517.0 S -MAMA G Y-GEM 5 STIS/NUV TIME-TA 52X0.2 G230L 2376 2 none none none 2 517.0 S -MAMA G 14713( 4) - 13-Sep-2016 17:57:17 - [ 5] Visit: 02 Visit Requirements: AFTER 01 BY 160 D TO 200 D 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 Y-GEM STIS/CCD ACQ F25ND3 MIRROR 1 1 S (1 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 Y-GEM STIS/FUV TIME-TA 52X0.2 G140L 1425 BUFFER-TIME=166 1 300 S PATTERN 1 2 -MAMA G see below (694 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 Y-GEM STIS/NUV TIME-TA 52X0.2 G230L 2376 BUFFER-TIME=166 1 300 S PATTERN 1 3 -MAMA G see below (694 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 Y-GEM STIS/FUV TIME-TA 52X0.2 G140L 1425 BUFFER-TIME=166 1 300 S PATTERN 1 4 -MAMA G see below (1034 S) ------------------------------------------------------------------------------------------------------------------------------------ 5 Y-GEM STIS/NUV TIME-TA 52X0.2 G230L 2376 BUFFER-TIME=166 1 300 S PATTERN 1 5 -MAMA G see below (1034 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 | ------------------------------------------------------------------------------------------------------------------------------------ Y-GEM 1 STIS/CCD ACQ F25ND3 MIRROR none none none none 1 N/A Y-GEM 2 STIS/FUV TIME-TA 52X0.2 G140L 1425 1 none none none 1 347.0 S -MAMA G Y-GEM 2 STIS/FUV TIME-TA 52X0.2 G140L 1425 2 none none none 1 347.0 S -MAMA G Y-GEM 3 STIS/NUV TIME-TA 52X0.2 G230L 2376 1 none none none 1 347.0 S -MAMA G Y-GEM 3 STIS/NUV TIME-TA 52X0.2 G230L 2376 2 none none none 1 347.0 S -MAMA G Y-GEM 4 STIS/FUV TIME-TA 52X0.2 G140L 1425 1 none none none 2 517.0 S -MAMA G Y-GEM 4 STIS/FUV TIME-TA 52X0.2 G140L 1425 2 none none none 2 517.0 S -MAMA G Y-GEM 5 STIS/NUV TIME-TA 52X0.2 G230L 2376 1 none none none 2 517.0 S -MAMA G Y-GEM 5 STIS/NUV TIME-TA 52X0.2 G230L 2376 2 none none none 2 517.0 S -MAMA G 14713( 4) - 13-Sep-2016 17:57:17 - [ 6] Visit: 03 Visit Requirements: VISIBILITY INTERVAL 52.8 M 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 EY-HYA STIS/CCD ACQ F25ND3 MIRROR 1 1 S (1 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 EY-HYA STIS/FUV TIME-TA 52X0.2 G140L 1425 BUFFER-TIME=166 1 300 S PATTERN 1 2 -MAMA G see below (668 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 EY-HYA STIS/NUV TIME-TA 52X0.2 G230L 2376 BUFFER-TIME=166 1 300 S PATTERN 1 3 -MAMA G see below (668 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 EY-HYA STIS/FUV TIME-TA 52X0.2 G140L 1425 BUFFER-TIME=166 1 300 S PATTERN 1 4 -MAMA G see below (1008 S) ------------------------------------------------------------------------------------------------------------------------------------ 5 EY-HYA STIS/NUV TIME-TA 52X0.2 G230L 2376 BUFFER-TIME=166 1 300 S PATTERN 1 5 -MAMA G see below (1008 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 | ------------------------------------------------------------------------------------------------------------------------------------ EY-HYA 1 STIS/CCD ACQ F25ND3 MIRROR none none none none 1 N/A EY-HYA 2 STIS/FUV TIME-TA 52X0.2 G140L 1425 1 none none none 1 334.0 S -MAMA G EY-HYA 2 STIS/FUV TIME-TA 52X0.2 G140L 1425 2 none none none 1 334.0 S -MAMA G EY-HYA 3 STIS/NUV TIME-TA 52X0.2 G230L 2376 1 none none none 1 334.0 S -MAMA G EY-HYA 3 STIS/NUV TIME-TA 52X0.2 G230L 2376 2 none none none 1 334.0 S -MAMA G EY-HYA 4 STIS/FUV TIME-TA 52X0.2 G140L 1425 1 none none none 2 504.0 S -MAMA G EY-HYA 4 STIS/FUV TIME-TA 52X0.2 G140L 1425 2 none none none 2 504.0 S -MAMA G EY-HYA 5 STIS/NUV TIME-TA 52X0.2 G230L 2376 1 none none none 2 504.0 S -MAMA G EY-HYA 5 STIS/NUV TIME-TA 52X0.2 G230L 2376 2 none none none 2 504.0 S -MAMA G 14713( 4) - 13-Sep-2016 17:57:17 - [ 7] Visit: 04 Visit Requirements: AFTER 03 BY 240 D TO 270 D 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 EY-HYA STIS/CCD ACQ F25ND3 MIRROR 1 1 S (1 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 EY-HYA STIS/FUV TIME-TA 52X0.2 G140L 1425 BUFFER-TIME=166 1 300 S PATTERN 1 2 -MAMA G see below (688 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 EY-HYA STIS/NUV TIME-TA 52X0.2 G230L 2376 BUFFER-TIME=166 1 300 S PATTERN 1 3 -MAMA G see below (688 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 EY-HYA STIS/FUV TIME-TA 52X0.2 G140L 1425 BUFFER-TIME=166 1 300 S PATTERN 1 4 -MAMA G see below (1028 S) ------------------------------------------------------------------------------------------------------------------------------------ 5 EY-HYA STIS/NUV TIME-TA 52X0.2 G230L 2376 BUFFER-TIME=166 1 300 S PATTERN 1 5 -MAMA G see below (1028 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 | ------------------------------------------------------------------------------------------------------------------------------------ EY-HYA 1 STIS/CCD ACQ F25ND3 MIRROR none none none none 1 N/A EY-HYA 2 STIS/FUV TIME-TA 52X0.2 G140L 1425 1 none none none 1 344.0 S -MAMA G EY-HYA 2 STIS/FUV TIME-TA 52X0.2 G140L 1425 2 none none none 1 344.0 S -MAMA G EY-HYA 3 STIS/NUV TIME-TA 52X0.2 G230L 2376 1 none none none 1 344.0 S -MAMA G EY-HYA 3 STIS/NUV TIME-TA 52X0.2 G230L 2376 2 none none none 1 344.0 S -MAMA G EY-HYA 4 STIS/FUV TIME-TA 52X0.2 G140L 1425 1 none none none 2 514.0 S -MAMA G EY-HYA 4 STIS/FUV TIME-TA 52X0.2 G140L 1425 2 none none none 2 514.0 S -MAMA G EY-HYA 5 STIS/NUV TIME-TA 52X0.2 G230L 2376 1 none none none 2 514.0 S -MAMA G EY-HYA 5 STIS/NUV TIME-TA 52X0.2 G230L 2376 2 none none none 2 514.0 S -MAMA G 14713( 4) - 13-Sep-2016 17:57:17 - [ 8] Summary Form for Proposal 14713 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures 52X0.2, F25ND3 ------------------------------------------------------------------------------------------------------------------------------------ Configurations STIS/CCD, STIS/FUV-MAMA, STIS/NUV-MAMA ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACQ, TIME-TAG ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters BUFFER-TIME=166 ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements AFTER 01 BY 160 D TO 200 D, AFTER 03 BY 240 D TO 270 D, PATTERN 1 2, PATTERN 1 3, PATTERN 1 4, PATTERN 1 5, VISIBILITY INTERVAL 52.8 M ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements G140L, G230L, MIRROR ------------------------------------------------------------------------------------------------------------------------------------ Target Names EY-HYA, Y-GEM ------------------------------------------------------------------------------------------------------------------------------------