Lyman Alpha Imaging of Two Quasar Host Galaxies at z>6

Lyman Alpha Imaging of Two Quasar Host Galaxies at z>6 We propose to image the Lyman Alpha emission line in two of the highest redshift quasar host galaxies (redshifts z=6.31 and 6.42) to map the amount and extent of star formation in the hosts and in their immediate environment. These observations are now possible for the first time, as UVIS on WFC3 (coincidentally) provides narrow-band filters at the right wavelengths. Circumstantial evidence (based on NIR, radio/millimeter and molecular gas measurements) suggests that these quasar hosts are undergoing intense ~1000 Msun/yr bursts of star formation over scales of ~5kpc (0.6"). Our program will provide (continuum-subtracted) images of the Lyman Alpha emission in the host which will in turn directly constrain the extent and magnitude of star formation in the host. In the case of the host galaxy of J1148+5251 (z=6.42) the Lyman Alpha emission will be compared to resolved imaging of the molecular gas phase (CO and [CII]) which in turn will yield critical constraints on the structure of the host galaxy and the conditions of the interstellar medium. The observations should also be sensitive enough to reveal potential companion galaxies (if the quasars are residing in major overdensities at these redshifts) and infall signatures in the immediate vicinity of the quasar. The narrow-band filters of UVIS/WFC3 provide the unique opportunity to study host/bulge formation at the end of cosmic reionization (less than 1Gyr after the Big Bang).

observing program to obtain narrow band lyman alpha imaging of 2 qso hosts at z~6 using the quad filters on wfc3. for each qso, one narrow band filter will be centred on the lyman alpha emission. a second narrow-band filter will observe the continuum emission. strategy is to observe one line and one continuum image in one orbit. exposure times are long (half orbit) as observations are read-out noise dominated. also, one psf star will be observed in the beginning of visit 1. important note: all four visits should be scheduled as closely together in time as possible as psf stability is key to this program. certainly visits 1&2 and visits 3&4 need to be scheduled close in time. if all four visits could be scheduled close in time this would be ideal (psf star will only be observed in visit 1). AGN/QUASARS 12 false 0.0 0.0 false false false false false false SUPPORTED GALAXY HIGH REDSHIFT GALAXY no v band magnitude (no flux due to gunn peterson effect). J2000 11 48 16.6400 +52 51 50.30 J2000 STAR UNDESIGNATED N71Y000922 J2000 00 00 0.0000 +00 00 0.00 J2000 GALAXY HIGH REDSHIFT GALAXY no v band magnitude (no flux due to gunn peterson effect). position is chosen such that bright star in field is outsided quadrant most of the time. roll angle constraints include the fact that visit 4 will be 45 degrees offset of visit 3. position of target qso is: 10 30 27.1, +05:24:55.0 J2000 10 30 27.1000 +05 24 55.00 J2000 WFC3/UVIS Imaging No No FQ906N WFC3/UVIS Imaging No No FQ924N WFC3/UVIS Imaging No No FQ889N WFC3/UVIS Imaging No No FQ906N POS-TARG DITHER 0.173 this dither box is only used for the observations of the PSF star. LINE 0.112 false false 81.785 4 23.884 WFC3-UVIS-DITHER-BOX 1

false

The scheduling data was generated by CASM 17.2. CASM was run in Phase II mode. first visit for J1148 this includes the PSF star in the first orbit no roll angle constraints (Tic-Visit :proposal-id 11640 :visit-id "01" :proposal-version -1 :trans-version "20080624" :date "02-Jul-2008 13:31:03.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 4 :saa-model "29" :si-bright-earth-limb-angle 20.0 :data-volume 2303008 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 11640 :visit-id "01" :obset-id "01" :pcs-mode "FGS" ) (Tic-Obset :proposal-id 11640 :visit-id "01" :obset-id "A1" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 11640 :visit-id "01" :orbit-number 1 :pcs-time 333 :si-vis-utilization 3120 :al-overhead-at-end 116 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3453 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11640 :visit-id "01" :orbit-number 2 :pcs-time 333 :si-vis-utilization 3120 :al-overhead-at-end 116 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3453 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11640 :visit-id "01" :orbit-number 3 :pcs-time 195 :si-vis-utilization 3258 :al-overhead-at-end 116 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3453 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11640 :visit-id "01" :orbit-number 4 :pcs-time 195 :si-vis-utilization 3258 :al-overhead-at-end 116 :internal-dur-at-end 670 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3453 :pcs-gap 0 ) false 4 0 only quadrant of interest will be read out to minimize overheads. psf star will be observed in standard dither mode. the remainder of orbit 1 will be used to observe J1148 in the 'line' filter. note: no cosmic ray split as we are read out noise dominated (and will have 8 frames for cr rejection). note that for the beginning of orbit 2 we force apt to get new guide stars (see special requirements). within visit 1, orbit 1 and orbits 2-4 have seperate guidestars (because of psf star observations in orbit 1). The scheduling data was generated by CASM 17.2. CASM was run in Phase II mode. second visit for J1148 visit 2 to be executed with a roll angle 45 degrees offset from the visit 1 (Tic-Visit :proposal-id 11640 :visit-id "02" :proposal-version -1 :trans-version "20080624" :date "02-Jul-2008 13:31:14.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 4 :saa-model "29" :si-bright-earth-limb-angle 20.0 :data-volume 2309952 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 11640 :visit-id "02" :obset-id "02" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 11640 :visit-id "02" :orbit-number 1 :pcs-time 333 :si-vis-utilization 3120 :al-overhead-at-end 116 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3453 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11640 :visit-id "02" :orbit-number 2 :pcs-time 195 :si-vis-utilization 3258 :al-overhead-at-end 116 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3453 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11640 :visit-id "02" :orbit-number 3 :pcs-time 195 :si-vis-utilization 3258 :al-overhead-at-end 116 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3453 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11640 :visit-id "02" :orbit-number 4 :pcs-time 195 :si-vis-utilization 3258 :al-overhead-at-end 116 :internal-dur-at-end 670 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3453 :pcs-gap 0 ) false 4 0 The scheduling data was generated by CASM 17.2. CASM was run in Phase II mode. first visit for J1030 [note that we do not center on J1030 because of bright star] (Tic-Visit :proposal-id 11640 :visit-id "03" :proposal-version -1 :trans-version "20080624" :date "02-Jul-2008 13:30:52.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 4 :saa-model "29" :si-bright-earth-limb-angle 20.0 :data-volume 2309952 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 11640 :visit-id "03" :obset-id "03" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 11640 :visit-id "03" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2909 :al-overhead-at-end 116 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3242 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11640 :visit-id "03" :orbit-number 2 :pcs-time 195 :si-vis-utilization 3047 :al-overhead-at-end 116 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3242 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11640 :visit-id "03" :orbit-number 3 :pcs-time 195 :si-vis-utilization 3047 :al-overhead-at-end 116 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3242 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11640 :visit-id "03" :orbit-number 4 :pcs-time 195 :si-vis-utilization 3047 :al-overhead-at-end 116 :internal-dur-at-end 670 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3242 :pcs-gap 0 ) false 4 0 The scheduling data was generated by CASM 17.2. CASM was run in Phase II mode. second visit for J1030 need to be 45 degrees offset from previous observations 1264671724000 322.0 (Tic-Visit :proposal-id 11640 :visit-id "04" :proposal-version -1 :trans-version "20080624" :date "02-Jul-2008 13:31:23.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 4 :saa-model "29" :si-bright-earth-limb-angle 20.0 :data-volume 2309952 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 11640 :visit-id "04" :obset-id "04" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 11640 :visit-id "04" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2909 :al-overhead-at-end 116 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3242 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11640 :visit-id "04" :orbit-number 2 :pcs-time 195 :si-vis-utilization 3047 :al-overhead-at-end 116 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3242 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11640 :visit-id "04" :orbit-number 3 :pcs-time 195 :si-vis-utilization 3047 :al-overhead-at-end 116 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3242 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11640 :visit-id "04" :orbit-number 4 :pcs-time 195 :si-vis-utilization 3047 :al-overhead-at-end 116 :internal-dur-at-end 670 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3242 :pcs-gap 0 ) false 4 0