Origin and Feedback of a Giant Radio Galaxy in an Extreme Protocluster at z=2.3

Could not connect to APT Status Server The list of Investigators does not match the STScI records for this program. The 4th submission: update CoI list, two CoIs missed -1398939106 ----- Attempting Submission 2 (Sun Jun 23 08:44:59 GMT 2024) ----- ----- Attempting Submission 3 (Tue Jul 02 21:10:25 GMT 2024) ----- ----- Attempting Submission 4 (Wed Aug 07 07:17:04 GMT 2024) ----- I find that the names of two Co-I are missed when automatically converting the VLA proposal to this joint HST proposal. You can check the VLA CoI list of this proposal at: https://library.nrao.edu/proposals/catalog/21250 Two CoI: Jianrui Li and Xin Wang do not show up in the HST proposal. Origin and Feedback of a Giant Radio Galaxy in an Extreme Protocluster at z=2.3 We propose deep VLA L-band imaging in A- and B-configuration to study the environment of radio galaxy J1348+24 at z=2.3, which has 550kpc radio lobes revealed by LOFAR. J1348+24 has the largest radio lobes identified at z>2 and is embedded in a giant nebula with multiphase CGM-scale emission, including Lya and CO. J1348+24 resides in an extremely massive galaxy overdensity, which contains the densest group of enormous Lya nebulae (ELANe) ever discovered. Nevertheless, power sources of these >100 kpc Lya emissions are missing in deep optical surveys. Our proposed observations aim to: (1) resolve the origin of the highest redshift giant radio lobes and study jet-induced feedback onto the host galaxy, combining the radio imaging with HST, ALMA, and optical IFU data; (2) measure obscured star-formation or AGN activity in the ELANe using the radio/FIR correlation, unraveling their mysterious powering. The wide VLA field-of-view allows us to image all seven ELANe in the protocluster in a single pointing. Additionally, complementary HST imaging is proposed to resolve the galaxy sub-components and map jet-induced star-formation. The proposed observations will provide new insights into feedback mechanisms in massive galaxy formation and the origin of the ELANe on scales even beyond the circumgalactic medium. In this program, we obtain two orbits of WFC3-IR imaging for the radio galaxy and a few enormous Lyman-alpha nebulae located in an extreme protocluster. We plan to target two WFC3-IR pointings (visits) to cover two proposed targets (MLAN1 and MLAN3) with one-orbit integration time for each pointing. The F105W (Wide Y) band is planned to be used, which will take rest-frame UV (300 nm) wavelength for the proposed targets at redshift z=2.3. The coordinates of targets have been fine-tuned to the center of the detector, so any position angle (PA) is acceptable for both pointings. For each target, we use a standard 2-point WFC3-IR-DITHER-BLOB dither pattern and a sub-pattern of 2-point WFC3-IR-DITHER-LINE with NSAMP=13 to populate each orbit. The SPARS50 sampling sequence is used. These arrangements can make full use of each orbit, provide a half-pixel subsampling of the point-spread function (PSF) for each pointing, dither over the IR blob, and reject cosmic rays. We place target MLAN3 at the detecter optimum center (IR aperture) to observe the radio galaxy and MLAN1 at the detector geometric center (IR-FIX aperture) to include more protocluster member galaxies. Team Expertise Supermassive Black Holes and Active Galaxies Galaxies 6 false false false false false false false false SUPPORTED GALAXY HIGH REDSHIFT GALAXY LYMAN ALPHA CLOUD RADIO GALAXY This object was generated by the targetselector and retrieved from the NED database. J1348+24 J2000 J2000 GALAXY HIGH REDSHIFT GALAXY LYMAN ALPHA CLOUD IVORYNEBULA J2000 J2000 WFC3/IR Imaging No No F105W WFC3/IR Imaging No No F105W POS-TARG DITHER DITHER 2 5.183 WFC3-IR-DITHER-LINE false true 0.636 2 41.859 POS-TARG WFC3-IR-DITHER-BLOB 41.788 1

true

1719954434642 The scheduling data was generated by CASM 32.1.1. CASM was run in Phase II mode. (Tic-Visit :proposal-id 17627 :visit-id "01" :proposal-version -1 :trans-version "20240604" :date "02-Jul-2024 23:07:14.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "30" :si-bright-earth-limb-angle 20.0 :data-volume 974896 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 17627 :visit-id "01" :obset-id "01" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 17627 :visit-id "01" :orbit-number 1 :pcs-time 380 :si-vis-utilization 2646 :al-overhead-at-end 0 :internal-dur-at-end 481 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3028 :pcs-gap 0 ) true 1 0 1719954435294 The scheduling data was generated by CASM 32.1.1. CASM was run in Phase II mode. (Tic-Visit :proposal-id 17627 :visit-id "02" :proposal-version -1 :trans-version "20240604" :date "02-Jul-2024 23:07:15.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "30" :si-bright-earth-limb-angle 20.0 :data-volume 974896 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 17627 :visit-id "02" :obset-id "02" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 17627 :visit-id "02" :orbit-number 1 :pcs-time 380 :si-vis-utilization 2646 :al-overhead-at-end 0 :internal-dur-at-end 481 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3028 :pcs-gap 0 ) true 1 0