1 Statement of Work Hubble Fellow and graduate student will carry out deep Spitzer imaging of the Subaru Deep Field (SDF) in IRAC 1 and 2 bands. The new data together with the existing data from our previous program will cover 90% of the known SDF galaxies at z> 6; to a depth of 5-6 hours or uJy (3 sigma). I will use the Spitzer IRAC data and our jount HST WFC3 data to characerize the physical properties of these highest-redshift galaxies known so far, and to obtain accurate information of stellar masses, ages, star formation histories, etc. This helps us to understand the earliest galaxy formation and evolution and the galaxy contribution to comsic reionization. I will also specifically address the following questions (1) Do Lyman alpha emitters and Lyman break galaxies represent physically two different galaxy populations at z> 6; (2) Is the Lyman alpha emission systemically suppressed at z> 6 with respect to the continuum emission, or, are we reaching the epoch of cosmic reionization; (3) Do we see any sign of abnormally young stellar population at z> 6. The data obtained through this program will have a legacy value for high-redshift studies in general.
|Effective start/end date||10/17/11 → 9/30/13|
- National Aeronautics Space Administration (NASA): $39,641.00