17875( 2) - 07-Nov-2024 16:39:57 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 17875 Version: 2 Check-in Time: 07-Nov-2024 16:39:57 STScI Edit Number: 0 Title SPT-CLJ2223-5015: RUNAWAY COOLING IN THE ABSENCE OF FEEDBACK? ------------------------------------------------------------------------------------ Type Cycle GO 32 ------------------------------------------------------------------------------------ Investigators Contact? PI: Prof. Michael A. McDonald Massachusetts Institute of Technology Y CoI: Dr. William R. Forman Smithsonian Institution Astrophysical N Observatory CoI: Dr. Taweewat Somboonpanyakul Chulalongkorn University N CoI: Michael S. Calzadilla Smithsonian Institution Astrophysical N Observatory CoI: Dr. Adam Mantz Stanford University N CoI: Prof. Julie Hlavacek-Larrondo Universite de Montreal N CoI: Dr. Charles Romero Green Bank Observatory N CoI: Dr. Benjamin Floyd University of Portsmouth N CoI: Prof. Massimo Gaspari University of Modena and Reggio Emilia N CoI: Dr. Matthias Klein Universitats-Sternwarte Munchen N CoI: Anthony M Flores Stanford University N CoI: Prof. Steven W. Allen Stanford University N CoI: Dr. Lindsey Bleem Argonne National Laboratory N ------------------------------------------------------------------------------------ Abstract We propose short Chandra (45ks) and Hubble (2 orbits) observations of a unique galaxy cluster, SPT-CLJ2223-5015. This cluster, at z=0.24, hosts a massive starburst at its center, with a star formation rate (50-130 Msun/yr) on par with the central galaxy in Abell 1835. Even more interesting, this central starburst galaxy appears to be radio quiet, with a radio luminosity 200x fainter than necessary to prevent runaway cooling of the ICM. Combining the proposed Chandra+Hubble data with approved ground-based spectroscopy, we will confirm that (i) the starburst galaxy lies in the center of the cluster, (ii) that the cluster is a strong cool core, and (iii) that the starburst is being fueled by runaway cooling of the ICM, in the absence of any radio-mode feedback. ------------------------------------------------------------------------------------ Observations Description ------------------------ The goal of this program is to obtain single-band imaging with WFC3-UVIS and WFC3-IR, using the F475W and F110W filters, respectively. ------------------------------------------------------------------------------------ 17875( 2) - 07-Nov-2024 16:39:57 - [ 2] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 SPT-CLJ2223- CLUSTER OF GALAXIES, RA=22H23M19.9547S, J2000 V = 16 5015 COOLING FLOW, EMISSION DEC=-50D15'57.17" LINE NEBULA, RICH CLUSTER Reference Frame: ICRS ------------------------------------------------------------------------------------------------------------------------------------ 17875( 2) - 07-Nov-2024 16:39:57 - [ 3] Patterns ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 1 Primary_Pattern Secondary_Pattern Pattern_Type WFC3-UVIS-DITHER-BOX Pattern_Purpose DITHER Number_Of_Points 4 Point_Spacing 0.173 Line_Spacing 0.112 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 NO ------------------------------------------------------------------------------------------------------------------------------------ 17875( 2) - 07-Nov-2024 16:39:57 - [ 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 SPT-CLJ2223 WFC3/UVI ACCUM UVIS1 F475W FLASH=5 1 500 S PATTERN 1 1 -5015 S see below (2288 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 | ------------------------------------------------------------------------------------------------------------------------------------ SPT-CLJ2223-5015 1 WFC3/UVI ACCUM UVIS1 F475W 1 none none none 1 572.0 S S SPT-CLJ2223-5015 1 WFC3/UVI ACCUM UVIS1 F475W 2 none none none 1 572.0 S S SPT-CLJ2223-5015 1 WFC3/UVI ACCUM UVIS1 F475W 3 none none none 1 572.0 S S SPT-CLJ2223-5015 1 WFC3/UVI ACCUM UVIS1 F475W 4 none none none 1 572.0 S S 17875( 2) - 07-Nov-2024 16:39:57 - [ 5] 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| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 SPT-CLJ2223 WFC3/IR MULTIAC IR F110W SAMP-SEQ=STEP100, NSAMP=12 1 DEF PATTERN 2 1 -5015 CUM (2396.929 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 | ------------------------------------------------------------------------------------------------------------------------------------ SPT-CLJ2223-5015 1 WFC3/IR MULTIAC IR F110W 1 none none none 1 N/A CUM SPT-CLJ2223-5015 1 WFC3/IR MULTIAC IR F110W 2 none none none 1 N/A CUM SPT-CLJ2223-5015 1 WFC3/IR MULTIAC IR F110W 3 none none none 1 N/A CUM SPT-CLJ2223-5015 1 WFC3/IR MULTIAC IR F110W 4 none none none 1 N/A CUM 17875( 2) - 07-Nov-2024 16:39:57 - [ 6] Summary Form for Proposal 17875 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures IR, UVIS1 ------------------------------------------------------------------------------------------------------------------------------------ Configurations WFC3/IR, WFC3/UVIS ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM, MULTIACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters FLASH=5, NSAMP=12, SAMP-SEQ=STEP100 ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements PATTERN 1 1, PATTERN 2 1 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F110W, F475W ------------------------------------------------------------------------------------------------------------------------------------ Target Names SPT-CLJ2223-5015 ------------------------------------------------------------------------------------------------------------------------------------