Near Infrared Observations of a Sample of z~6.5-6.7 Galaxies

Near Infrared Observations of a Sample of z~6.5-6.7 Galaxies The majority of the most distant galaxies discovered to date have been found by strong Lyman alpha emission at red optical wavelengths. An accurate estimate of the star formation rates for these objects requires a measurement of the line-free UV continuum, which must be taken at infrared wavelengths. Here we propose to obtain imaging with WFC3 in the F140W filter for a sample of 9 Lyman alpha galaxies with redshifts z~6.5 up to z=6.740 from a complete, flux-limited widefield narrowband and multi-color survey conducted on the 8-m Subaru Telescope. This program will investigate galaxy morphologies and star formation for a uniform sample of the highest redshift galaxies now known.

We will observe each of the galaxies in the sensitive broad band filter F160W using the NIC2 camera. (The F110W band contains emission from the Lyman alpha line.) We will not observe at longer wavelengths where we already have very deep ground based K images with 0.4'' resolution obtained with the CISCO camera on the Subaru 8m telescope. The filter and camera combination provides the required angular resolution and minimizes detector issues. The 19'' FOV of NIC2 will also allow us to easily match the images to the ground data and will also allow us to look for peripheral objects or structure in the vicinity of the galaxy. We have calculated the exposure times to give a S/N of 10 assuming that the surface brightness is uniform over a 0.5 square arcsecond region and using a J band flux for the objects of $2.5\times10^{-30}$ erg cm$^{-2}$ s$^{-1}$ Hz$^{-1}$ at 1.1 microns (the average flux measured on stacked ground-based images). If the galaxies are highly structured we should obtain better S/N in the bright components. We require 3 orbits per galaxy for the F160W observations. COSMOLOGY 12 false 0.0 0.0 false false false false false false SUPPORTED GALAXY HIGH REDSHIFT GALAXY Lyman alpha galaxy selected by emission-line flux for continuum imaging. Flux given is typical stacked J flux estimate from ground-based images 2.5e-30 erg cm^-2 s^-1 Hz^-1 J2000 02 39 11.0000 -01 41 19.00 J2000 GALAXY HIGH REDSHIFT GALAXY Lyman alpha galaxy selected by emission-line flux for continuum imaging. Flux given is typical stacked J flux estimate from ground-based images 2.5e-30 erg cm^-2 s^-1 Hz^-1 J2000 02 39 27.0000 -01 35 23.00 J2000 GALAXY HIGH REDSHIFT GALAXY Lyman alpha galaxy selected by emission-line flux for continuum imaging. Flux given is typical stacked J flux estimate from ground-based images 2.5e-30 erg cm^-2 s^-1 Hz^-1 J2000 02 39 39.0000 -01 34 32.00 J2000 GALAXY HIGH REDSHIFT GALAXY Lyman alpha galaxy selected by emission-line flux for continuum imaging. Flux given is typical stacked J flux estimate from ground-based images 2.5e-30 erg cm^-2 s^-1 Hz^-1 J2000 02 39 49.0000 -01 31 21.00 J2000 GALAXY HIGH REDSHIFT GALAXY Lyman alpha galaxy selected by emission-line flux for continuum imaging. Flux given is typical stacked J flux estimate from ground-based images 2.5e-30 erg cm^-2 s^-1 Hz^-1 J2000 02 39 54.7300 -01 33 32.80 J2000 GALAXY HIGH REDSHIFT GALAXY Lyman alpha galaxy selected by emission-line flux for continuum imaging. Flux given is typical stacked J flux estimate from ground-based images 2.5e-30 erg cm^-2 s^-1 Hz^-1 J2000 02 40 1.0000 -01 41 0.00 J2000 GALAXY HIGH REDSHIFT GALAXY Lyman alpha galaxy selected by emission-line flux for continuum imaging. Flux given is typical stacked J flux estimate from ground-based images 2.5e-30 erg cm^-2 s^-1 Hz^-1 J2000 02 40 4.0000 -01 22 52.00 J2000 GALAXY HIGH REDSHIFT GALAXY Lyman alpha galaxy selected by emission-line flux for continuum imaging. Flux given is typical stacked J flux estimate from ground-based images 2.5e-30 erg cm^-2 s^-1 Hz^-1 J2000 02 40 14.0000 -01 24 14.00 J2000 WFC3/IR Imaging No No F140W WFC3/IR Imaging No No F140W WFC3/IR Imaging No No F140W WFC3/IR Imaging No No F140W WFC3/IR Imaging No No F140W WFC3/IR Imaging No No F140W WFC3/IR Imaging No No F140W WFC3/IR Imaging No No F140W WFC3/IR Imaging No No F140W POS-TARG DITHER 0.572 LINE 0.365 false false 74.653 4 18.528 WFC3-IR-DITHER-BOX-MIN 1

false

The scheduling data was generated by CASM 17.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 11108 :visit-id "01" :proposal-version -1 :trans-version "20090702" :date "31-Aug-2009 02:46:46.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 2 :saa-model "30" :si-bright-earth-limb-angle 40.0 :data-volume 3342512 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 11108 :visit-id "01" :obset-id "01" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 11108 :visit-id "01" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2306 :al-overhead-at-end 0 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "Y" :pcs-visibility 2793 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11108 :visit-id "01" :orbit-number 2 :pcs-time 222 :si-vis-utilization 2306 :al-overhead-at-end 0 :internal-dur-at-end 687 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "Y" :pcs-visibility 2793 :pcs-gap 0 ) true 2 0 The scheduling data was generated by CASM 17.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 11108 :visit-id "02" :proposal-version -1 :trans-version "20090702" :date "31-Aug-2009 02:46:50.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 2 :saa-model "30" :si-bright-earth-limb-angle 40.0 :data-volume 3342512 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 11108 :visit-id "02" :obset-id "02" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 11108 :visit-id "02" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2306 :al-overhead-at-end 0 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "Y" :pcs-visibility 2793 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11108 :visit-id "02" :orbit-number 2 :pcs-time 222 :si-vis-utilization 2306 :al-overhead-at-end 0 :internal-dur-at-end 687 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "Y" :pcs-visibility 2793 :pcs-gap 0 ) true 2 0 The scheduling data was generated by CASM 17.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 11108 :visit-id "03" :proposal-version -1 :trans-version "20090702" :date "31-Aug-2009 02:46:55.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 2 :saa-model "30" :si-bright-earth-limb-angle 40.0 :data-volume 3342512 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 11108 :visit-id "03" :obset-id "03" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 11108 :visit-id "03" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2306 :al-overhead-at-end 0 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "Y" :pcs-visibility 2793 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11108 :visit-id "03" :orbit-number 2 :pcs-time 222 :si-vis-utilization 2306 :al-overhead-at-end 0 :internal-dur-at-end 687 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "Y" :pcs-visibility 2793 :pcs-gap 0 ) true 2 0 The scheduling data was generated by CASM 17.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 11108 :visit-id "04" :proposal-version -1 :trans-version "20090702" :date "31-Aug-2009 02:46:58.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 2 :saa-model "30" :si-bright-earth-limb-angle 40.0 :data-volume 3342512 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 11108 :visit-id "04" :obset-id "04" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 11108 :visit-id "04" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2306 :al-overhead-at-end 0 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "Y" :pcs-visibility 2793 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11108 :visit-id "04" :orbit-number 2 :pcs-time 222 :si-vis-utilization 2306 :al-overhead-at-end 0 :internal-dur-at-end 687 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "Y" :pcs-visibility 2793 :pcs-gap 0 ) true 2 0 The scheduling data was generated by CASM 17.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 11108 :visit-id "05" :proposal-version -1 :trans-version "20090702" :date "31-Aug-2009 02:47:00.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 2 :saa-model "30" :si-bright-earth-limb-angle 40.0 :data-volume 3342512 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 11108 :visit-id "05" :obset-id "05" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 11108 :visit-id "05" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2306 :al-overhead-at-end 0 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "Y" :pcs-visibility 2793 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11108 :visit-id "05" :orbit-number 2 :pcs-time 222 :si-vis-utilization 2306 :al-overhead-at-end 0 :internal-dur-at-end 687 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "Y" :pcs-visibility 2793 :pcs-gap 0 ) true 2 0 The scheduling data was generated by CASM 17.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 11108 :visit-id "06" :proposal-version -1 :trans-version "20090702" :date "31-Aug-2009 02:47:03.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 2 :saa-model "30" :si-bright-earth-limb-angle 40.0 :data-volume 3342512 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 11108 :visit-id "06" :obset-id "06" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 11108 :visit-id "06" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2306 :al-overhead-at-end 0 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "Y" :pcs-visibility 2793 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11108 :visit-id "06" :orbit-number 2 :pcs-time 222 :si-vis-utilization 2306 :al-overhead-at-end 0 :internal-dur-at-end 687 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "Y" :pcs-visibility 2793 :pcs-gap 0 ) false 2 0 The scheduling data was generated by CASM 17.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 11108 :visit-id "07" :proposal-version -1 :trans-version "20090702" :date "31-Aug-2009 02:47:05.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 2 :saa-model "30" :si-bright-earth-limb-angle 40.0 :data-volume 3342512 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 11108 :visit-id "07" :obset-id "07" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 11108 :visit-id "07" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2306 :al-overhead-at-end 0 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "Y" :pcs-visibility 2793 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11108 :visit-id "07" :orbit-number 2 :pcs-time 222 :si-vis-utilization 2306 :al-overhead-at-end 0 :internal-dur-at-end 687 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "Y" :pcs-visibility 2793 :pcs-gap 0 ) true 2 0 The scheduling data was generated by CASM 17.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 11108 :visit-id "08" :proposal-version -1 :trans-version "20090702" :date "31-Aug-2009 02:47:08.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 2 :saa-model "30" :si-bright-earth-limb-angle 40.0 :data-volume 3342512 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 11108 :visit-id "08" :obset-id "08" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 11108 :visit-id "08" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2306 :al-overhead-at-end 0 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "Y" :pcs-visibility 2793 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11108 :visit-id "08" :orbit-number 2 :pcs-time 222 :si-vis-utilization 2306 :al-overhead-at-end 0 :internal-dur-at-end 687 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "Y" :pcs-visibility 2793 :pcs-gap 0 ) true 2 0