13485( 7) - 26-Feb-2014 13:54:47 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 13485 Version: 7 Check-in Time: 26-Feb-2014 13:54:47 STScI Edit Number: 0 Title The HH 24 Jet Complex: Collimated and Colliding Jets from a Newborn Multiple Stellar System ------------------------------------------------------------------------------------ Type Cycle GO 21 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. Bo Reipurth University of Hawaii Y CoI: Prof. John Bally University of Colorado at Boulder N CoI: Dr. George H. Herbig University of Hawaii N CoI: Dr. Alejandro Raga Universidad Nacional Autonoma de Mexico N (UNAM) CoI: Dr. Hsin-Fang Chiang University of Hawaii Y CoI: Dr. Colin Aspin University of Hawaii N ------------------------------------------------------------------------------------ Abstract The HH 24 complex constitutes the richest concentration of collimated bright Herbig-Haro jets known, and they originate from a small grouping of newborn binary and multiple systems. At least 6 jets are identified in deep groundbased optical interference images, and a similar number of sources in infrared images. We propose to do the first HST study of this complex, using H-alpha and [SII] filters. HST 0.05" to 0.1" angular resolution (20 to 40 AU at d~400 pc) is needed to resolve the shocks and their post-shock cooling layers for comparison with advanced numerical modeling. Our emphasis here is to explore outflows from a multiple system of newborn stars. Many of the jets show clear evidence of wiggling. The theory of jet motion from binary systems coupled with disk precession is now understood, and we will interpret the jet wiggles in this framework. Additionally, two of the HH 24 jets are showing evidence for a collision, a unique situation not seen anywhere else, and HST resolution is needed for comparison with gas-dynamic studies of jet-jet collisions. Two of the HH 24 jets are bright in the infrared [FeII] 1.644 line. In this line the main jet can be traced all the way to the source, which is the most important region for understanding the effects of binarity on the jet structure. We also apply for a second-epoch [SII] image in Cycle 23. This allows us, in addition to deriving the bulk motion, to determine such processes as expansion of the jet beam, sideways ejection in a working surface, turbulent and chaotic motions, and the effect of instabilities. ------------------------------------------------------------------------------------ Observations Description ------------------------ We have tried to determine absolute fluxes of knots in the HH 24 jet No.4 from our groundbased data. The main body of the jet ranges from 1.2x10-15 to 1.2x10-14 erg sec-1 cm-2 arcsec-2 in [SII] (this does not include the bright knot in the collision region, which is much brighter). For 0.04'' pixels the exposure time calculator for WFC3 indicates that we will get a S/N of 10 for exposure times ranging from 1900 sec to 26000 sec. The H-alpha emission has about the same range in fluxes (although distributed very differently from the [SII] knots). In both cases we are photon-limited, that is, out of the read noise. In the infrared [FeII] 1.644 micron line, we measure a flux in our 13485( 7) - 26-Feb-2014 13:54:47 - [ 2] groundbased images of 2x10-15 erg sec-1 cm-2 arcsec-2 in the brightest knot in the HH 24 jet No.4 (again not in the very bright collision zone at the end of the jet). The exposure time calculator indicates that we get a S/N of 10 in 478 sec. The jet fades steadily along its body by about a factor 100. Hence in practical terms the exposure time decides how far out along the jet that we can get meaningful results. In the first visit (2 orbits) we observe the HH 24 complex in H-alpha (F656N) with the standard 4 point dithering by WFC3/UVIS. The second visit (2 orbits) is the same as the first visit, but in [SII] (F673N). The third visit (2 orbits) observe [FeII] in the F164N filter using the WFC3/IR detector, and a total of 6 sequences with dithering are used. The pointing of the IR visit is slightly different from the H-alpha/[SII] visits in order to better focus on the jet No.4 lobes. We would like these 3 visits observed as close together as possible, not exceeding a month in interval. This is important due to the significant tangential motion of the objects, so the closer in time the visits can be made, the better. Besides the primary WFC3 observations, we have received permission (Request Number 74858) to execute coordinated parallel observations with ACS/WFC. These parallel observations are done in the H-alpha filter F658N for all orbits, and they target the objects HH 19/20/21, which are the working surfaces of the HH 24 jet. The HH 19/20/21 objects are very extended, and therefore are observable for a range of Orient Angle between 82 and 110 D. The ideal Orient would be between 82 and 96 D, but any angle up to 110D will be satisfactory, if needed for scheduling purposes. Real Time Justification ----------------------- Calibration Justification ------------------------- Additional Comments ------------------- ------------------------------------------------------------------------------------ 13485( 7) - 26-Feb-2014 13:54:47 - [ 3] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 HH24 ISM, HERBIG-HARO OBJECT RA=05H46M9.1000S +/- 0.1", J2000 V = 35 DEC=-00D09'44.50" +/- 0.1" Reference Frame: ICRS Comments: The HH 24 jet complex contains shocks with fluxes ranging over many orders of magnitude, from the brighest knots to weak diffuse emission. ------------------------------------------------------------------------------------------------------------------------------------ 2 HH24JET4 ISM, HERBIG-HARO OBJECT RA=05H46M8.8000S +/- 0.1", J2000 V = 35 DEC=-00D10'3.00" +/- 0.1" Reference Frame: ICRS Comments: The HH 24 jet complex contains shocks with fluxes ranging over many orders of magnitude, from the brighest knots to weak diffuse emission. ------------------------------------------------------------------------------------------------------------------------------------ 13485( 7) - 26-Feb-2014 13:54:47 - [ 4] Patterns ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 1 Primary_Pattern Secondary_Pattern Pattern_Type WFC3-UVIS-DITHER-BOX Pattern_Purpose DITHER Number_Of_Points 4 Point_Spacing 3.633 Line_Spacing 2.352 Coordinate_Frame POS-TARG Pattern_Orient 23.884 Angle_Between_Sides 81.785 Center_Pattern NO ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 2 Primary_Pattern Secondary_Pattern Pattern_Type WFC3-IR-DITHER-BOX-MIN Pattern_Purpose DITHER Number_Of_Points 4 Point_Spacing 0.572 Line_Spacing 0.365 Coordinate_Frame POS-TARG Pattern_Orient 18.528 Angle_Between_Sides 74.653 Center_Pattern YES ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 3 Primary_Pattern Secondary_Pattern Pattern_Type WFC3-IR-DITHER-LINE Pattern_Purpose DITHER Number_Of_Points 2 Point_Spacing 0.45 Line_Spacing Coordinate_Frame POS-TARG Pattern_Orient 131.788 Angle_Between_Sides Center_Pattern NO ------------------------------------------------------------------------------------------------------------------------------------ 13485( 7) - 26-Feb-2014 13:54:47 - [ 5] Visit: 01 Visit Requirements: ORIENT 82D TO 110 D; GROUP 01, 02, 03 WITHIN 30D 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 HH24 WFC3/UVI ACCUM UVIS-CENT F656N FLASH=10 1 1300 S PATTERN 1 1-2; PAR 2 S ER see below WITH 1 (5578 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 ANY ACS/WFC ACCUM WFC F658N 1 1000 S see below (5165 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 | ------------------------------------------------------------------------------------------------------------------------------------ HH24 1 WFC3/UVI ACCUM UVIS-CEN F656N 1 none none none 1 1359.0 S S TER HH24 1 WFC3/UVI ACCUM UVIS-CEN F656N 2 none none none 1 1359.0 S S TER HH24 1 WFC3/UVI ACCUM UVIS-CEN F656N 3 none none none 2 1430.0 S S TER HH24 1 WFC3/UVI ACCUM UVIS-CEN F656N 4 none none none 2 1430.0 S S TER ANY 2 ACS/WFC ACCUM WFC F658N 1 none none none 1 1230.0 S ANY 2 ACS/WFC ACCUM WFC F658N 2 none none none 1 1230.0 S ANY 2 ACS/WFC ACCUM WFC F658N 3 none none none 2 1400.0 S ANY 2 ACS/WFC ACCUM WFC F658N 4 none none none 2 1305.0 S 13485( 7) - 26-Feb-2014 13:54:47 - [ 6] Visit: 02 Visit Requirements: ORIENT 82D TO 110 D; GROUP 02, 01, 03 WITHIN 30D 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 HH24 WFC3/UVI ACCUM UVIS-CENT F673N FLASH=10 1 1300 S PATTERN 1 1-2; PAR 2 S ER see below WITH 1 (5578 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 ANY ACS/WFC ACCUM WFC F658N 1 1000 S see below (5165 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 | ------------------------------------------------------------------------------------------------------------------------------------ HH24 1 WFC3/UVI ACCUM UVIS-CEN F673N 1 none none none 1 1359.0 S S TER HH24 1 WFC3/UVI ACCUM UVIS-CEN F673N 2 none none none 1 1359.0 S S TER HH24 1 WFC3/UVI ACCUM UVIS-CEN F673N 3 none none none 2 1430.0 S S TER HH24 1 WFC3/UVI ACCUM UVIS-CEN F673N 4 none none none 2 1430.0 S S TER ANY 2 ACS/WFC ACCUM WFC F658N 1 none none none 1 1230.0 S ANY 2 ACS/WFC ACCUM WFC F658N 2 none none none 1 1230.0 S ANY 2 ACS/WFC ACCUM WFC F658N 3 none none none 2 1400.0 S ANY 2 ACS/WFC ACCUM WFC F658N 4 none none none 2 1305.0 S 13485( 7) - 26-Feb-2014 13:54:47 - [ 7] Visit: 03 Visit Requirements: ORIENT 82D TO 110 D; GROUP 03, 01, 02 WITHIN 30D 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 HH24JET4 WFC3/IR MULTIAC IR F164N SAMP-SEQ=STEP100, NSAMP=15 1 DEF PATTERN 2 1-2; PAR 2 CUM (3596.933 WITH 1 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 ANY ACS/WFC ACCUM WFC F658N 1 700 S see below (3130 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 HH24JET4 WFC3/IR MULTIAC IR F164N SAMP-SEQ=STEP100, NSAMP=15 1 DEF PATTERN 3 3-4; PAR 4 CUM (1798.467 WITH 3 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 ANY ACS/WFC ACCUM WFC F658N 1 700 S see below (1606 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 | ------------------------------------------------------------------------------------------------------------------------------------ HH24JET4 1 WFC3/IR MULTIAC IR F164N 1 none none none 1 N/A CUM HH24JET4 1 WFC3/IR MULTIAC IR F164N 2 none none none 1 N/A CUM HH24JET4 1 WFC3/IR MULTIAC IR F164N 3 none none none 1 N/A CUM HH24JET4 1 WFC3/IR MULTIAC IR F164N 4 none none none 2 N/A CUM ANY 2 ACS/WFC ACCUM WFC F658N 1 none none none 1 721.0 S ANY 2 ACS/WFC ACCUM WFC F658N 2 none none none 1 803.0 S ANY 2 ACS/WFC ACCUM WFC F658N 3 none none none 1 803.0 S ANY 2 ACS/WFC ACCUM WFC F658N 4 none none none 2 803.0 S HH24JET4 3 WFC3/IR MULTIAC IR F164N 1 none none none 2 N/A CUM HH24JET4 3 WFC3/IR MULTIAC IR F164N 2 none none none 2 N/A CUM ANY 4 ACS/WFC ACCUM WFC F658N 1 none none none 2 803.0 S ANY 4 ACS/WFC ACCUM WFC F658N 2 none none none 2 803.0 S 13485( 7) - 26-Feb-2014 13:54:47 - [ 8] Visit: 04 Visit Requirements: ORIENT 82D TO 110 D; BETWEEN 18-JAN-2014:00:00:00 AND 19-MAR-2014:00:00:00 On Hold Comments: Additional Comments: copy of visit 1, which failed during the gyro failure 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 HH24 WFC3/UVI ACCUM UVIS-CENT F656N FLASH=10 1 1300 S PATTERN 1 1-2; PAR 2 S ER see below WITH 1 (5578 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 ANY ACS/WFC ACCUM WFC F658N 1 1000 S see below (5165 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 | ------------------------------------------------------------------------------------------------------------------------------------ HH24 1 WFC3/UVI ACCUM UVIS-CEN F656N 1 none none none 1 1359.0 S S TER HH24 1 WFC3/UVI ACCUM UVIS-CEN F656N 2 none none none 1 1359.0 S S TER HH24 1 WFC3/UVI ACCUM UVIS-CEN F656N 3 none none none 2 1430.0 S S TER HH24 1 WFC3/UVI ACCUM UVIS-CEN F656N 4 none none none 2 1430.0 S S TER ANY 2 ACS/WFC ACCUM WFC F658N 1 none none none 1 1230.0 S ANY 2 ACS/WFC ACCUM WFC F658N 2 none none none 1 1230.0 S ANY 2 ACS/WFC ACCUM WFC F658N 3 none none none 2 1400.0 S ANY 2 ACS/WFC ACCUM WFC F658N 4 none none none 2 1305.0 S 13485( 7) - 26-Feb-2014 13:54:47 - [ 9] Summary Form for Proposal 13485 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures IR, UVIS-CENTER, WFC ------------------------------------------------------------------------------------------------------------------------------------ Configurations ACS/WFC, WFC3/IR, WFC3/UVIS ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM, MULTIACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters FLASH=10, NSAMP=15, SAMP-SEQ=STEP100 ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements BETWEEN 18-JAN-2014:00:00:00 AND 19-MAR-2014:00:00:00, GROUP 01, 02, 03 WITHIN 30D, GROUP 02, 01, 03 WITHIN 30D, GROUP 03, 01, 02 WITHIN 30D, ORIENT 82D TO 110 D, PAR 2 WITH 1, PAR 4 WITH 3, PATTERN 1 1-2, PATTERN 2 1-2, PATTERN 3 3-4 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F164N, F656N, F658N, F673N ------------------------------------------------------------------------------------------------------------------------------------ Target Names ANY, HH24, HH24JET4 ------------------------------------------------------------------------------------------------------------------------------------