11230( 4) - 15-Dec-2008 13:48:58 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 11230 Version: 4 Check-in Time: 15-Dec-2008 13:48:58 STScI Edit Number: 0 Title HST FUV Observations of Brightest Cluster Galaxies: The Role of Star Formation in Cooling Flows and BCG Evolution ------------------------------------------------------------------------------------ Type Cycle GO 16 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. Christopher P. O'Dea Rochester Institute of Technology CoI: Dr. Stefi A. Baum Rochester Institute of Technology N CoI: Dr. Alastair C. Edge University of Durham N CoI: Dr. Alice Quillen University of Rochester N CoI: Mr. Jaehong Park University of Rochester N CoI: Dr. Megan Donahue Michigan State University N CoI: Prof. Mark Voit Michigan State University N ------------------------------------------------------------------------------------ Abstract The intracluster medium (ICM) now appears to be a very dynamic place where heating and cooling processes vie for dominance and an uneasy equilibrium is maintained. Since these same processes may operate during the process of galaxy formation, the centers of clusters of galaxies provide low redshift laboratories for studying the critical processes involved in galaxy formation and black hole growth. At the present time, the main questions are (1) How much gas is cooling out of the ICM? (2) How much star formation is ongoing? (3) What is the impact of the gas and star formation on the central BCG? In order to measure the current star formation in BCGs we have undertaken a program of Spitzer IRAC and MIPS observations. We are in process of obtaining observations of a sample of Brightest Cluster Galaxies in 70 clusters selected from the ROSAT all sky survey. In about 25% of the sources observed so far, we detect a mid-IR excess which we attribute to dust heated by star formation. We propose to obtain ACS/SBC observations of the Lyman Alpha emission line and the adjacent FUV continuum in 7 BCGs which are in cooling core clusters of galaxies and have a large mid-IR excess. We also propose WFPC2 F606W observations of the two clusters without high resolution imaging to allow us to image the dust on the same scale as the Far UV continuum. The FUV will allow us to confirm the presense of ongoing starformation in these BCGs and will allow us to rule out an AGN as the dominant contributer to the mid-IR. The morphology and spatial extent of the young stars and the heated dust and CO will constrain the spatial scale over which star formation occurs and thus where the cooling gas is deposited. The combination of our FUV and IR observations will allow us to estimate the star formation rates which must balance the rate at which cold gas is deposited in the BCG. Our proposed FUV observations will produce unique information about the cooling gas, the true mass accretion rates, and the star formation rates in BCGs and its effect on the galaxy. ------------------------------------------------------------------------------------ Observations Description ------------------------ We wil obtain ACS/SBC observations of the Lyman alpha emission line and the adjacent FUV continuum in 7 cooling core clusters of galaxies. We have chosen clusters from the ROSAT Brightest Cluster Sample (BCS) (Ebeling et al 1998). We 11230( 4) - 15-Dec-2008 13:48:58 - [ 2] have picked clusters with extreme H-alpha luminosities (1E42-43 ergs/s) which are about one order of magnitude higher than those of A1795 and A2597 (Crawford et al 1999). The high H-alpha luminosities place the strongest demands on models for heating and cooling in the ICM, and the ionization of the nebulae. We will observe each cluster in a filter which passes Lyman alpha and one which does not. The second filter will be used for the measurement of the FUV continuum and for continuum subtraction from the Lyman alpha image. The F125LP filter is ideal for the Lyman alpha image since it does not include geocoronal Lyman alpha but passes extragalactic Lyman alpha, for z>0.03. The continuum filter is F140LP for z < 0.11, F150LP for 0.11< z < 0.19, and F165LP for 0.19 < z < 0.31, The ACS/SBC is actually more sensitive than the STIS/FUV-MAMA that we used for A1795 and A2597. We have run a series of ETC calculations which show that our expected signal-to-noise ratio for the seven clusters is comparable to or better than the values we obtained for A1795 and A2597. In order to calculate the S/N we use the observed H-alpha flux for each cluster and estimate the expected Lyman-alpha flux and FUV continuum using the empirical relationships we found in A1795 and A2597 (O'Dea et al 2004). Our previous HST FUV observations detected all three central dominant galaxies (A426, A1795, and A2597 - Baum et al 2005; O'Dea eta l 2004). So we expect to detect the FUV emission in these clusters. We will also obtain an observation in WFPC2 F606W for the two galaxies without such data - R1532+30 and Z8193. This will allow us to image the dust on the same scale as the FUV. We have shifted the position of RXJ0821 ten arsec north to avoid a bright star to the south of the SBC FOV. All observations are done with a 3 point dither. Real Time Justification ----------------------- Calibration Justification ------------------------- Additional Comments ------------------- ------------------------------------------------------------------------------------ 11230( 4) - 15-Dec-2008 13:48:58 - [ 3] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 ZWCL3146 CLUSTER OF GALAXIES, RA=10H23M39.6000S +/- 0.1", J2000 V = 17 BCM DEC=+04D11'12.00" +/- 0.1" Reference Frame: ICRS Comments: ------------------------------------------------------------------------------------------------------------------------------------ 2 A1835 CLUSTER OF GALAXIES, RA=14H01M2.0000S +/- 0.1", J2000 V = 15 BCM, COOLING FLOW DEC=+02D52'45.00" +/- 0.1" Reference Frame: ICRS Comments: ------------------------------------------------------------------------------------------------------------------------------------ 4 ZWCL8193 CLUSTER OF GALAXIES, RA=17H17M19.1000S +/- 0.1", J2000 V = 13 BCM DEC=+42D26'57.20" +/- 0.1" Reference Frame: ICRS Comments: ------------------------------------------------------------------------------------------------------------------------------------ 8 ZWCL0348 CLUSTER OF GALAXIES, RA=01H06M49.3500S +/- 0.1", J2000 V = 19 BCM, COOLING FLOW DEC=+01D03'22.60" +/- 0.1" Reference Frame: ICRS Comments: ------------------------------------------------------------------------------------------------------------------------------------ 9 A0011 CLUSTER OF GALAXIES, RA=00H12M33.8200S +/- 0.1", J2000 V = 17.5 BCM, COOLING FLOW DEC=-16D28'6.50" +/- 0.1" Reference Frame: ICRS Comments: ------------------------------------------------------------------------------------------------------------------------------------ 10 A1664 CLUSTER OF GALAXIES, RA=13H03M42.5000S +/- 0.1", J2000 V = 15.7 BCM, COOLING FLOW DEC=-24D14'41.00" +/- 0.1" Reference Frame: ICRS Comments: ------------------------------------------------------------------------------------------------------------------------------------ 11 R2129+00 CLUSTER OF GALAXIES, RA=21H29M39.9000S +/- 0.1", J2000 V = 18 COOLING FLOW, BCM DEC=+00D05'23.00" +/- 0.1" Reference Frame: ICRS Comments: ------------------------------------------------------------------------------------------------------------------------------------ 11230( 4) - 15-Dec-2008 13:48:58 - [ 4] Patterns ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 1 Primary_Pattern Secondary_Pattern Pattern_Type ACS-SBC-DITHER-LINE Pattern_Purpose DITHER Number_Of_Points 3 Point_Spacing 0.472 Line_Spacing Coordinate_Frame POS-TARG Pattern_Orient 44.4 Angle_Between_Sides Center_Pattern NO ------------------------------------------------------------------------------------------------------------------------------------ 11230( 4) - 15-Dec-2008 13:48:58 - [ 5] Visit: 01 Visit Requirements: PCS MODE FINE 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 ZWCL3146 ACS/SBC ACCUM SBC F140LP 1 390.0 S PATTERN 1 1 ------------------------------------------------------------------------------------------------------------------------------------ 2 ZWCL3146 ACS/SBC ACCUM SBC F165LP 1 390.0 S PATTERN 1 2 ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ ZWCL3146 1 ACS/SBC ACCUM SBC F140LP 1 none none none 1 N/A ZWCL3146 1 ACS/SBC ACCUM SBC F140LP 2 none none none 1 N/A ZWCL3146 1 ACS/SBC ACCUM SBC F140LP 3 none none none 1 N/A ZWCL3146 2 ACS/SBC ACCUM SBC F165LP 1 none none none 1 N/A ZWCL3146 2 ACS/SBC ACCUM SBC F165LP 2 none none none 1 N/A ZWCL3146 2 ACS/SBC ACCUM SBC F165LP 3 none none none 1 N/A 11230( 4) - 15-Dec-2008 13:48:58 - [ 6] Visit: 02 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| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 A1835 ACS/SBC ACCUM SBC F140LP 1 390.0 S PATTERN 1 1 ------------------------------------------------------------------------------------------------------------------------------------ 2 A1835 ACS/SBC ACCUM SBC F165LP 1 390.0 S PATTERN 1 2 ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ A1835 1 ACS/SBC ACCUM SBC F140LP 1 none none none 1 N/A A1835 1 ACS/SBC ACCUM SBC F140LP 2 none none none 1 N/A A1835 1 ACS/SBC ACCUM SBC F140LP 3 none none none 1 N/A A1835 2 ACS/SBC ACCUM SBC F165LP 1 none none none 1 N/A A1835 2 ACS/SBC ACCUM SBC F165LP 2 none none none 1 N/A A1835 2 ACS/SBC ACCUM SBC F165LP 3 none none none 1 N/A 11230( 4) - 15-Dec-2008 13:48:58 - [ 7] Visit: 04 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| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 ZWCL8193 ACS/SBC ACCUM SBC F140LP 1 390.0 S PATTERN 1 1 ------------------------------------------------------------------------------------------------------------------------------------ 2 ZWCL8193 ACS/SBC ACCUM SBC F150LP 1 390.0 S PATTERN 1 2 ------------------------------------------------------------------------------------------------------------------------------------ 3 ZWCL8193 WFPC2 IMAGE WF3 F606W CR-SPLIT=NO 1 700.0 S ------------------------------------------------------------------------------------------------------------------------------------ 4 ZWCL8193 WFPC2 IMAGE WF3 F606W 1 600.0 S POS TARG 0.498, 0.498 ------------------------------------------------------------------------------------------------------------------------------------ 5 ZWCL8193 WFPC2 IMAGE WF3 F606W 1 600.0 S POS TARG 0.996, 0.996 ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ ZWCL8193 1 ACS/SBC ACCUM SBC F140LP 1 none none none 1 N/A ZWCL8193 1 ACS/SBC ACCUM SBC F140LP 2 none none none 1 N/A ZWCL8193 1 ACS/SBC ACCUM SBC F140LP 3 none none none 1 N/A ZWCL8193 2 ACS/SBC ACCUM SBC F150LP 1 none none none 1 N/A ZWCL8193 2 ACS/SBC ACCUM SBC F150LP 2 none none none 1 N/A ZWCL8193 2 ACS/SBC ACCUM SBC F150LP 3 none none none 1 N/A ZWCL8193 3 WFPC2 IMAGE WF3 F606W none none none none 2 N/A ZWCL8193 4 WFPC2 IMAGE WF3 F606W none none none none 2 N/A ZWCL8193 5 WFPC2 IMAGE WF3 F606W none none none none 2 N/A 11230( 4) - 15-Dec-2008 13:48:58 - [ 8] Visit: 08 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| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 ZWCL0348 ACS/SBC ACCUM SBC F140LP 1 390.0 S PATTERN 1 1 ------------------------------------------------------------------------------------------------------------------------------------ 2 ZWCL0348 ACS/SBC ACCUM SBC F165LP 1 390.0 S PATTERN 1 2 ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ ZWCL0348 1 ACS/SBC ACCUM SBC F140LP 1 none none none 1 N/A ZWCL0348 1 ACS/SBC ACCUM SBC F140LP 2 none none none 1 N/A ZWCL0348 1 ACS/SBC ACCUM SBC F140LP 3 none none none 1 N/A ZWCL0348 2 ACS/SBC ACCUM SBC F165LP 1 none none none 1 N/A ZWCL0348 2 ACS/SBC ACCUM SBC F165LP 2 none none none 1 N/A ZWCL0348 2 ACS/SBC ACCUM SBC F165LP 3 none none none 1 N/A 11230( 4) - 15-Dec-2008 13:48:58 - [ 9] Visit: 09 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| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 A0011 ACS/SBC ACCUM SBC F125LP 1 390.0 S PATTERN 1 1 ------------------------------------------------------------------------------------------------------------------------------------ 2 A0011 ACS/SBC ACCUM SBC F150LP 1 390.0 S PATTERN 1 2 ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ A0011 1 ACS/SBC ACCUM SBC F125LP 1 none none none 1 N/A A0011 1 ACS/SBC ACCUM SBC F125LP 2 none none none 1 N/A A0011 1 ACS/SBC ACCUM SBC F125LP 3 none none none 1 N/A A0011 2 ACS/SBC ACCUM SBC F150LP 1 none none none 1 N/A A0011 2 ACS/SBC ACCUM SBC F150LP 2 none none none 1 N/A A0011 2 ACS/SBC ACCUM SBC F150LP 3 none none none 1 N/A 11230( 4) - 15-Dec-2008 13:48:58 - [ 10] Visit: 10 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| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 R2129+00 ACS/SBC ACCUM SBC F140LP 1 390.0 S PATTERN 1 1 ------------------------------------------------------------------------------------------------------------------------------------ 2 R2129+00 ACS/SBC ACCUM SBC F165LP 1 390.0 S PATTERN 1 2 ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ R2129+00 1 ACS/SBC ACCUM SBC F140LP 1 none none none 1 N/A R2129+00 1 ACS/SBC ACCUM SBC F140LP 2 none none none 1 N/A R2129+00 1 ACS/SBC ACCUM SBC F140LP 3 none none none 1 N/A R2129+00 2 ACS/SBC ACCUM SBC F165LP 1 none none none 1 N/A R2129+00 2 ACS/SBC ACCUM SBC F165LP 2 none none none 1 N/A R2129+00 2 ACS/SBC ACCUM SBC F165LP 3 none none none 1 N/A 11230( 4) - 15-Dec-2008 13:48:58 - [ 11] Visit: 11 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| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 A1664 ACS/SBC ACCUM SBC F125LP 1 390.0 S PATTERN 1 1 ------------------------------------------------------------------------------------------------------------------------------------ 2 A1664 ACS/SBC ACCUM SBC F150LP 1 390.0 S PATTERN 1 2 ------------------------------------------------------------------------------------------------------------------------------------ 3 A1664 WFPC2 IMAGE WF3 F606W 1 600.0 S ------------------------------------------------------------------------------------------------------------------------------------ 4 A1664 WFPC2 IMAGE WF3 F606W 1 600.0 S POS TARG 0.498, 0.498 ------------------------------------------------------------------------------------------------------------------------------------ 5 A1664 WFPC2 IMAGE WF3 F606W 1 600.0 S POS TARG 0.996, 0.996 ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ A1664 1 ACS/SBC ACCUM SBC F125LP 1 none none none 1 N/A A1664 1 ACS/SBC ACCUM SBC F125LP 2 none none none 1 N/A A1664 1 ACS/SBC ACCUM SBC F125LP 3 none none none 1 N/A A1664 2 ACS/SBC ACCUM SBC F150LP 1 none none none 1 N/A A1664 2 ACS/SBC ACCUM SBC F150LP 2 none none none 1 N/A A1664 2 ACS/SBC ACCUM SBC F150LP 3 none none none 1 N/A A1664 3 WFPC2 IMAGE WF3 F606W none none none none 2 N/A A1664 4 WFPC2 IMAGE WF3 F606W none none none none 2 N/A A1664 5 WFPC2 IMAGE WF3 F606W none none none none 2 N/A 11230( 4) - 15-Dec-2008 13:48:58 - [ 12] Visit: 51 Visit Requirements: PCS MODE FINE On Hold Comments: Additional Comments: HOPR repeat of visit 1 Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 ZWCL3146 ACS/SBC ACCUM SBC F140LP 1 390.0 S PATTERN 1 1 ------------------------------------------------------------------------------------------------------------------------------------ 2 ZWCL3146 ACS/SBC ACCUM SBC F165LP 1 390.0 S PATTERN 1 2 ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ ZWCL3146 1 ACS/SBC ACCUM SBC F140LP 1 none none none 1 N/A ZWCL3146 1 ACS/SBC ACCUM SBC F140LP 2 none none none 1 N/A ZWCL3146 1 ACS/SBC ACCUM SBC F140LP 3 none none none 1 N/A ZWCL3146 2 ACS/SBC ACCUM SBC F165LP 1 none none none 1 N/A ZWCL3146 2 ACS/SBC ACCUM SBC F165LP 2 none none none 1 N/A ZWCL3146 2 ACS/SBC ACCUM SBC F165LP 3 none none none 1 N/A 11230( 4) - 15-Dec-2008 13:48:58 - [ 13] Summary Form for Proposal 11230 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures SBC, WF3 ------------------------------------------------------------------------------------------------------------------------------------ Configurations ACS/SBC, WFPC2 ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM, IMAGE ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters CR-SPLIT=NO ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements PATTERN 1 1, PATTERN 1 2, PCS MODE FINE, POS TARG 0.498, 0.498, POS TARG 0.996, 0.996 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F125LP, F140LP, F150LP, F165LP, F606W ------------------------------------------------------------------------------------------------------------------------------------ Target Names A0011, A1664, A1835, R2129+00, ZWCL0348, ZWCL3146, ZWCL8193 ------------------------------------------------------------------------------------------------------------------------------------