14690( 4) - 02-Aug-2016 15:00:28 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 14690 Version: 4 Check-in Time: 02-Aug-2016 15:00:28 STScI Edit Number: 2 Title Identifing the last unkown emission component in the Herbig system HD 163296 ------------------------------------------------------------------------------------ Type Cycle GO 24 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. Hans Moritz Guenther Massachusetts Institute of Technology Y CoI: Dr. Christian Schneider European Space Agency - ESTEC N ------------------------------------------------------------------------------------ Abstract The HAeBe star HD 163296 is surrounded by a circum-stellar accretion disk and drives a highly-collimated jet. It was observed four times in the UV with HST/STIS long-slit spectroscopy; in all cases the slit was oriented along the jet. These observations discovered extended, red-shifted Ly alpha emission of unknown origin on the same side of the star as the blue-shifted jet. We propose to explore the origin of this component using three new STIS G140M long-slit exposures with different position angles. This allows us to differentiate three scenarios for the emission: (i) dust scattering in the jet, (ii) dust scattering in the disk and (iii) a very fast disk wind. Case (i) would show that the jet is a collimated disk wind, not a stellar wind, (ii) would imply that the Ly alpha emission comes from magnetically funneled accretion and (iii) would prove that the disk wind is an order of magnitude faster than expected from photo-evaporation models. Each of these results would constitute a major step in our understanding of intermediate mass star formation. ------------------------------------------------------------------------------------ Observations Description ------------------------ HH 409 was observed with STIS in 1999, 2000 and 2011. The most prominent line in the FUV is Ly alpha which is spatially extended beyond 200 AU with a kinematic signature incompatible with the known jet in this object. We have 3 orbits of HST time to measure i) the position and ii) the spectrum of the extended Ly alpha emission. The HST observations closely resemble existing observations which show that no safety constraint will be violated; we copied the exposure times for ACQ exposures from those existing observations (I also tried to replicate that in the ETC, so that I could paste a numbers in the form that asks for an ETC run, but really, we know what we get based on the exisiting obsrvations). We observe the FUV lines with the G140M grating, central wavelength 1218 Ang for one full orbit. We will use the 52x0.05 slit. At 1200 A the throughput is about 20%, half the value of the 52x0.2 slit which was used in the previous observations. Three observations should be done: - Parallel to the jet (like previous observations, but with a narrower slit) - Perpendicular to the jet - in-between In order to make those observations schedulable, we have to increase the schedulability and allow for shorter observations. 14690( 4) - 02-Aug-2016 15:00:28 - [ 2] The extended Ly alpha as well as the continuum are bright enough to measure their spatial profile with less than half the flux of the existing data (flux reduced by narrower slit + shorter visits due to increased scheduling flexibility) and by using the narrower slit we will obtain a better spectral resolution and, more importantly, minimize the region of overlap on the sky (if e.g. the feature extended 0.25", but only in the jet direction, then all the emission would be seen in a slit with width 0.5" independent of the position angle). ------------------------------------------------------------------------------------ 14690( 4) - 02-Aug-2016 15:00:28 - [ 3] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 HD-163296 STAR, DISK, EJECTA, RA=17H56M21.2880S, J2000 V = 6.86 HERBIG AE/BE, JET, KNOT DEC=-21D57'21.87" 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 -5.736029833229388E-4 -0.03921 0.00843 ------------------------------------------------------------------------------------------------------------------------------------ 14690( 4) - 02-Aug-2016 15:00:28 - [ 4] Visit: 01 (parallel) Visit Requirements: ORIENT 88.3D TO 90.3 D; BETWEEN 01-JUL-2017 AND 30-AUG-2017 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 HD-163296 STIS/CCD ACQ F28X50OII MIRROR 1 1.5 S (1.5 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 HD-163296 STIS/CCD ACQ/PEA 52X0.05 G430L 4300 1 1 S (1 S) K ------------------------------------------------------------------------------------------------------------------------------------ 3 HD-163296 STIS/FUV TIME-TA 52X0.05 G140M 1218 BUFFER-TIME=1000, WAVECAL=NO 1 1000 S -MAMA G see below (2021 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 WAVE STIS/FUV ACCUM 52X0.05 G140M 1218 1 DEF (0 S) -MAMA ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ HD-163296 1 STIS/CCD ACQ F28X50OI MIRROR none none none none 1 N/A I HD-163296 2 STIS/CCD ACQ/PEA 52X0.05 G430L 4300 none none none none 1 N/A K HD-163296 3 STIS/FUV TIME-TA 52X0.05 G140M 1218 none none none none 1 2021.0 S -MAMA G WAVE 4 STIS/FUV ACCUM 52X0.05 G140M 1218 none none none none 1 N/A -MAMA 14690( 4) - 02-Aug-2016 15:00:28 - [ 5] Visit: 02 (inbetween) Visit Requirements: SCHED 100%; ORIENT 130D TO 160 D; ORIENT 310D TO 340 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 HD-163296 STIS/CCD ACQ F28X50OII MIRROR 1 1.5 S (1.5 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 HD-163296 STIS/CCD ACQ/PEA 52X0.05 G430L 4300 1 1 S (1 S) K ------------------------------------------------------------------------------------------------------------------------------------ 3 HD-163296 STIS/FUV TIME-TA 52X0.05 G140M 1218 BUFFER-TIME=1000, WAVECAL=NO 1 1000 S -MAMA G see below (1792 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 WAVE STIS/FUV ACCUM 52X0.05 G140M 1218 1 DEF (0 S) -MAMA ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ HD-163296 1 STIS/CCD ACQ F28X50OI MIRROR none none none none 1 N/A I HD-163296 2 STIS/CCD ACQ/PEA 52X0.05 G430L 4300 none none none none 1 N/A K HD-163296 3 STIS/FUV TIME-TA 52X0.05 G140M 1218 none none none none 1 1792.0 S -MAMA G WAVE 4 STIS/FUV ACCUM 52X0.05 G140M 1218 none none none none 1 N/A -MAMA 14690( 4) - 02-Aug-2016 15:00:28 - [ 6] Visit: 03 (perpendicular) Visit Requirements: SCHED 100%; ORIENT 0D TO 30 D; ORIENT 180D TO 210 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 HD-163296 STIS/CCD ACQ F28X50OII MIRROR 1 1.5 S (1.5 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 HD-163296 STIS/CCD ACQ/PEA 52X0.05 G430L 4300 1 1 S (1 S) K ------------------------------------------------------------------------------------------------------------------------------------ 3 HD-163296 STIS/FUV TIME-TA 52X0.05 G140M 1218 BUFFER-TIME=1000, WAVECAL=NO 1 1000 S -MAMA G see below (1792 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 WAVE STIS/FUV ACCUM 52X0.05 G140M 1218 1 DEF (0 S) -MAMA ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ HD-163296 1 STIS/CCD ACQ F28X50OI MIRROR none none none none 1 N/A I HD-163296 2 STIS/CCD ACQ/PEA 52X0.05 G430L 4300 none none none none 1 N/A K HD-163296 3 STIS/FUV TIME-TA 52X0.05 G140M 1218 none none none none 1 1792.0 S -MAMA G WAVE 4 STIS/FUV ACCUM 52X0.05 G140M 1218 none none none none 1 N/A -MAMA 14690( 4) - 02-Aug-2016 15:00:28 - [ 7] Summary Form for Proposal 14690 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures 52X0.05, F28X50OII ------------------------------------------------------------------------------------------------------------------------------------ Configurations STIS/CCD, STIS/FUV-MAMA ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM, ACQ, ACQ/PEAK, TIME-TAG ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters BUFFER-TIME=1000, WAVECAL=NO ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements BETWEEN 01-JUL-2017 AND 30-AUG-2017, ORIENT 0D TO 30 D, ORIENT 130D TO 160 D, ORIENT 180D TO 210 D, ORIENT 310D TO 340 D, ORIENT 88.3D TO 90.3 D, SCHED 100% ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements G140M, G430L, MIRROR ------------------------------------------------------------------------------------------------------------------------------------ Target Names HD-163296, WAVE ------------------------------------------------------------------------------------------------------------------------------------