8173( 3) - 10/12/99 09:41 - [ 1] PROPOSAL FOR HUBBLE SPACE TELESCOPE OBSERVATIONS ST ScI Use Only ID: 8173 Version: 3 Check-in Date: 05-Feb-1999 15:51:20 1.Proposal Title: Alignment and evolution of redshift one radio galaxies ------------------------------------------------------------------------------------ 2. Proposal For 3. Cycle GO 8 ------------------------------------------------------------------------------------ 4. Investigators Contact? PI: Philip Best Sterrewacht Leiden CoI: Dr Steve Eales Cardiff University N CoI: Prof Malcolm Longair Cavendish Astrophysics N CoI: Dr Steve Rawlings Oxford University N CoI: Dr Huub Roettgering Sterrewacht Leiden N ------------------------------------------------------------------------------------ 5. Abstract The galaxies associated with powerful distant radio sources are the most massive ellipticals known at early cosmic epochs, and are also uniquely important for understanding the physics of AGN and the interactions between the radio source and its environment. Our HST observations of a complete sample of powerful 3CR radio galaxies at redshift z ~ 1 reveal detailed small--scale structures aligned along the radio axis of these sources. In combination with deep emission line studies, we have shown that the properties of the host galaxies change dramatically throughout the lifetime of the radio source, being dominated in the small sources by the effects of the shocks associated with the radio activity. To allow quantitative measurements of the on-going physical processes and the nature of the surrounding environment, the importance of the radio beam power must be determined. To tackle this issue, in cycle 6 we began a project using WFPC2, imaging 5 galaxies from a complete sub sa mple of 11 lower radio power 6C sources. The first results show that the 6C galaxies also possess aligned optical emission, but at lower flux densities than the 3CR galaxies. Comparison with our new VLA data shows radio--optical correlations on kpc scales. We now propose to finish the WFPC2 observations of our complete VLA subsample. This larger sample of galaxies over a wide range of radio sizes will allow an investigation of the evolution of the host galaxy properties following the passage of lower power radio jets. ------------------------------------------------------------------------------------ 8173( 3) - 10/12/99 09:41 - [ 2] Observations Description ------------------------ A complete subsample of 11 6C radio galaxies with redshifts 0.85 < z < 1.5 has been drawn from the sample defined by Eales in 1985. This is the redshift range at which the 3CR sources (studied in cycles 4 and 5, and to which the 6C galaxies form a lower radio luminosity comparison sample) are most spectacularly aligned along the radio axis. 5 of the 6C sources were imaged using WFPC2 for two orbits each during cycle 6. Here it is proposed that the remaining 6 be similarly imaged; the higher redshift sources are imaged for 3 orbits, the lower redshift objects for 2. Real Time Justification ----------------------- Calibration Justification ------------------------- Additional Comments ------------------- ------------------------------------------------------------------------------------ Data Distribution Paper Products: YES Media: DAT Blocking Factor: 10 Ship To: PI_Address Ship Via: Email: ------------------------------------------------------------------------------------ 8173( 3) - 10/12/99 09:41 - [ 3] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 6C0825+34 GALAXY, RADIO GALAXY, RA=8H 28M 26.85S +/- 1", DEC=34D J2000 Z = 1.46 V = 22.5+/-0.5 HIGH REDSHIFT GALAXY 42' 49.1" +/- 1" V-R = 1.0+/-0.5 2 6C1019+39 GALAXY, RADIO GALAXY, RA=10H 22M 55.25S +/- 1", J2000 Z = 0.92 V = 22.5+/-0.5 HIGH REDSHIFT GALAXY DEC=39D 8' 49.9" +/- 1" V-R = 1.0+/-0.5 3 6C1100+35 GALAXY, RADIO GALAXY, RA=11H 3M 26.26S +/- 1", DEC=34D J2000 Z = 1.44 V = 23.0+/-0.5 HIGH REDSHIFT GALAXY 49' 47.2" +/- 1" V-R = 1.0+/-0.5 4 6C1204+35 GALAXY, RADIO GALAXY, RA=12H 7M 31.86S +/- 1", DEC=35D J2000 Z = 1.37 V = 23.0+/-0.5 HIGH REDSHIFT GALAXY 3' 6.2" +/- 1" V-R = 1.0+/-0.5 5 6C1217+36 GALAXY, RADIO GALAXY, RA=12H 20M 9.83S +/- 1", DEC=36D J2000 Z = 1.09 V = 22.5+/-0.5 HIGH REDSHIFT GALAXY 29' 7.1" +/- 1" V-R = 1.0+/-0.5 6 6C1257+36 GALAXY, RADIO GALAXY, RA=12H 59M 30.02S +/- 1", J2000 Z = 1.00 V = 23.0+/-0.5 HIGH REDSHIFT GALAXY DEC=36D 17' 3.0" +/- 1" V-R = 1.0+/-0.5 8173( 3) - 10/12/99 09:41 - [ 4] Visit: 01 Visit Priority: Visit Requirements: On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 6C0825+34 WFPC2 IMAGE WFALL F814W 3 2400 S LOW-SKY MAX DUR 200% ------------------------------------------------------------------------------------------------------------------------------------ 8173( 3) - 10/12/99 09:41 - [ 5] Visit: 02 Visit Priority: Visit Requirements: On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 2 6C1019+39 WFPC2 IMAGE WFALL F606W 1 2400 S LOW-SKY MAX DUR 200% ------------------------------------------------------------------------------------------------------------------------------------ 12 6C1019+39 WFPC2 IMAGE WFALL F814W 1 2400 S LOW-SKY MAX DUR 200% ------------------------------------------------------------------------------------------------------------------------------------ 8173( 3) - 10/12/99 09:41 - [ 6] Visit: 03 Visit Priority: Visit Requirements: On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 3 6C1100+35 WFPC2 IMAGE WFALL F814W 3 2400 S LOW-SKY MAX DUR 200% ------------------------------------------------------------------------------------------------------------------------------------ 8173( 3) - 10/12/99 09:41 - [ 7] Visit: 04 Visit Priority: Visit Requirements: On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 4 6C1204+35 WFPC2 IMAGE WFALL F814W 3 2400 S LOW-SKY MAX DUR 200% ------------------------------------------------------------------------------------------------------------------------------------ 8173( 3) - 10/12/99 09:41 - [ 8] Visit: 05 Visit Priority: Visit Requirements: On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 5 6C1217+36 WFPC2 IMAGE WFALL F606W 1 2400 S LOW-SKY MAX DUR 200% ------------------------------------------------------------------------------------------------------------------------------------ 15 6C1217+36 WFPC2 IMAGE WFALL F814W 1 2400 S LOW-SKY MAX DUR 200% ------------------------------------------------------------------------------------------------------------------------------------ 8173( 3) - 10/12/99 09:41 - [ 9] Visit: 06 Visit Priority: Visit Requirements: On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exposure| Target |Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Number | Name |Config| Mode |or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 6 6C1257+36 WFPC2 IMAGE WFALL F606W 1 2400 S LOW-SKY MAX DUR 200% ------------------------------------------------------------------------------------------------------------------------------------ 16 6C1257+36 WFPC2 IMAGE WFALL F814W 1 2400 S LOW-SKY MAX DUR 200% ------------------------------------------------------------------------------------------------------------------------------------ 8173( 3) - 10/12/99 09:41 - [ 10] Summary Form for Proposal 8173 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures WFALL ------------------------------------------------------------------------------------------------------------------------------------ Configurations WFPC2 ------------------------------------------------------------------------------------------------------------------------------------ Opmodes IMAGE ------------------------------------------------------------------------------------------------------------------------------------ Proposal Category GO ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements LOW-SKY MAX DUR 200% ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F814W F606W ------------------------------------------------------------------------------------------------------------------------------------ Target Names 6C0825+34 6C1019+39 6C1100+35 6C1204+35 6C1217+36 6C1257+36 ------------------------------------------------------------------------------------------------------------------------------------