Please use this identifier to cite or link to this item:
|Title:||Spitzer UltRa Faint SUrvey Program (SURFS UP). II. IRAC-detected Lyman-Break Galaxies at 6 ≲ z ≲ 10 behind Strong-lensing Clusters||Authors:||Huang, Kuang-Han
Lemaux, Brian C.
Ryan, R. E., Jr.
Brammer, Gabriel B.
Lubin, L. M.
Schmidt, Kasper B.
Gonzalez, Anthony H.
von der Linden, Anja
Knight, Robert I.
|Issue Date:||2016||Journal:||THE ASTROPHYSICAL JOURNAL||Number:||817||Issue:||1||First Page:||11||Abstract:||We study the stellar population properties of the IRAC-detected 6 ≲ z ≲ 10 galaxy candidates from the Spitzer UltRa Faint SUrvey Program. Using the Lyman Break selection technique, we find a total of 17 galaxy candidates at 6 ≲ z ≲ 10 from Hubble Space Telescope images (including the full-depth images from the Hubble Frontier Fields program for MACS 1149 and MACS 0717) that have detections at signal-to-noise ratios ≥ 3 in at least one of the IRAC 3.6 and 4.5 μm channels. According to the best mass models available for the surveyed galaxy clusters, these IRAC-detected galaxy candidates are magnified by factors of ∼1.2-5.5. Due to the magnification of the foreground galaxy clusters, the rest-frame UV absolute magnitudes M<SUB>1600</SUB> are between -21.2 and -18.9 mag, while their intrinsic stellar masses are between 2 × 10<SUP>8</SUP>M<SUB>☉</SUB> and 2.9 × 10<SUP>9</SUP>M<SUB>☉</SUB>. We identify two Lyα emitters in our sample from the Keck DEIMOS spectra, one at z<SUB>Lyα</SUB> = 6.76 (in RXJ 1347) and one at z<SUB>Lyα</SUB> = 6.32 (in MACS 0454). We find that 4 out of 17 z ≳ 6 galaxy candidates are favored by z ≲ 1 solutions when IRAC fluxes are included in photometric redshift fitting. We also show that IRAC [3.6]-[4.5] color, when combined with photometric redshift, can be used to identify galaxies which likely have strong nebular emission lines or obscured active galactic nucleus contributions within certain redshift windows.||URI:||http://hdl.handle.net/20.500.12386/26370||URL:||https://iopscience.iop.org/article/10.3847/0004-637X/817/1/11||ISSN:||0004-637X||DOI:||10.3847/0004-637X/817/1/11||Bibcode ADS:||2016ApJ...817...11H||Fulltext:||open|
|Appears in Collections:||1.01 Articoli in rivista|
Show full item record
Files in This Item:
|1504.02099.pdf||postprint||4.6 MB||Adobe PDF||View/Open|
|Huang_2016_ApJ_817_11.pdf||Pdf editoriale||6.13 MB||Adobe PDF||View/Open|
checked on Sep 20, 2020
checked on Sep 20, 2020
Items in DSpace are published in Open Access, unless otherwise indicated.