Near-IR Imaging of Three Spectacular Lensed Submillimeter Galaxies Discovered by the Herschel Lensing Survey

0 Assigned ID: 718 ----- Attempting Submission 1 (Fri Apr 10 19:39:05 GMT 2015) ----- HST Phase I Proposal 718 (hls.apt) successfully submitted. Receipt: # 718-1 ----- Attempting Submission 2 (Fri Apr 10 20:40:55 GMT 2015) ----- HST Phase I Proposal 718 (hls.apt) successfully submitted. Receipt: # 718-2 ----- Attempting Submission 3 (Fri Apr 10 20:52:15 GMT 2015) ----- ORBITAL VISIBILITY OVERRUN ORBITAL VISIBILITY OVERRUN 0 ----- Attempting Submission 1 (Fri Jul 24 00:51:20 GMT 2015) ----- Low-sky keyword was set, and the submitted exposures outflow the low-sky window a little bit. However, since this overflow is very small and the end of the last exposure is well inside the unocculted window, we're leaving this error as it is. Near-IR Imaging of Three Spectacular Lensed Submillimeter Galaxies Discovered by the Herschel Lensing Survey One of the most remarkable Herschel results is the discovery of exceptionally bright gravitationally lensed submillimeter galaxies (SMGs). The great sensitivity and mapping speed of SPIRE on Herschel have enabled us to find these rare (< 1 per square degree) extraordinary objects in large numbers. Here, we propose to conduct near-IR imaging of three spectacular lensed SMGs at z=2.04, 4.69, and 5.24 discovered by our Herschel Lensing Survey (HLS; PI: Egami), which has imaged a total of 581 massive galaxy cluster fields. High-resolution dust-continuum and CO/[CII] line maps we have obtained with SMA, PdBI, JVLA revealed complicated internal structures, allowing us to probe the properties of star-forming regions on the sub-kpc scale. What is missing, however, is the information on the underlying stellar population. We will fill this gap by obtaining WFC3/IR images and mapping out the spatial distribution of the underlying stellar population as well as the amount of dust extinction it suffers. We will soon receive ALMA data for two of these SMGs with a spatial resolution of 0.2", and the third galaxy already has PdBI maps with a spatial resolution of 0.3" (this galaxy is too north for ALMA to observe). The ~0.15'' resolution provided by WFC3/IR nicely matches these resolutions, and can produce a source-plane spatial resolution of <100 pc when the lensing magnification is taken into account. Such a combination of HST/WFC3 images and high-resolution submillimeter/millimeter maps will open up a new frontier in the study of vigorously star-forming dust-obscured galaxies at high redshift, allowing us to probe the physical properties of star-forming regions individually. We will conduct near-IR imaging of three spectacular lensed submillimeter galaxies at z=2.04, 4.69, and 5.24 using WFC3/IR with the F110W and F160W filters. The z=2.04 galaxy is a gravitational arc extending over ~5". We will integrated for 0.5 orbit per filter. The z=4.69 galaxy consists of four lensed images that roughly form a rectangle of ~10" on a side. We will integrate for 1 orbit per filter. The z=5.24 galaxy is a gravitational ring with a radius of ~1" centered on a foreground lensing galaxy. We will integrate for one orbit per filter. COSMOLOGY 12 false false false false 0.0 0.0 SUPPORTED GALAXY STARBURST ULTRALUMINOUS IR GAL YES This z=4.69 galaxy consists of four lensed images that roughly form a rectangle of ~10" on a side. J2000 J2000 J/H ~26-27 AB mag GALAXY STARBURST ULTRALUMINOUS IR GAL YES This z=2.04 galaxy is a gravitational arc extending over ~5". J2000 J2000 J/H = 25-26 AB mag GALAXY STARBURST ULTRALUMINOUS IR GAL YES This z=5.24 galaxy is a gravitational ring with a radius of ~1" centered on a foreground lensing galaxy. J2000 J2000 J/H ~ 26-27 AB mag WFC3/IR Imaging No No F110W WFC3/IR Imaging No No F160W WFC3/IR Imaging No No F110W WFC3/IR Imaging No No F160W WFC3/IR Imaging No No F110W WFC3/IR Imaging No No F160W POS-TARG DITHER 0.572 LINE 0.365 false false 74.653 4 18.528 WFC3-IR-DITHER-BOX-MIN 1

false

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