%0 Generic %1 wang2016sxdfalma %A Wang, Wei-Hao %A Kohno, Kotaro %A Hatsukade, Bunyo %A Umehata, Hideki %A Aretxaga, Itziar %A Hughes, David %A Caputi, Karina I. %A Dunlop, James S. %A Ikarashi, Soh %A Iono, Daisuke %A Ivison, Rob J. %A Lee, Minju %A Makiya, Ryu %A Matsuda, Yuichi %A Motohara, Kentaro %A Nakanish, Kouichiro %A Ohta, Kouji %A Tadaki, Ken-ichi %A Tamura, Yoichi %A Kodama, Tadayuki %A Rujopakarn, Wiphu %A Wilson, Grant W. %A Yamaguchi, Yuki %A Yun, Min S. %A Coupon, Jean %A Hsieh, Bau-Ching %A Foucaud, Sebastien %D 2016 %K dust evolution sfr %T SXDF-ALMA 2-arcmin^2 Deep Survey: Stacking of Rest-Frame Near-Infrared Selected Objects %U http://arxiv.org/abs/1609.08772 %X We present stacking analyses on our ALMA deep 1.1 mm imaging in the SXDF using 1.6 \mum and 3.6 \mum selected galaxies in the CANDELS WFC3 catalog. We detect a stacked flux of ~0.03-0.05 mJy, corresponding to LIR < 10^11 Lsun and a star formation rate (SFR) of ~ 15 Msun/yr at z = 2. We find that galaxies brighter in the rest-frame near-infrared tend to be also brighter at 1.1 mm, and galaxies fainter than m3.6um = 23 do not produce detectable 1.1 mm emission. This suggests a correlation between stellar mass and SFR, but outliers to this correlation are also observed, suggesting strongly boosted star formation or extremely large extinction. We also find tendencies that redder galaxies and galaxies at higher redshifts are brighter at 1.1 mm. Our field contains z ~ 2.5 H-alpha emitters and a bright single-dish source. However, we do not find evidence of bias in our results caused by the bright source. By combining the fluxes of sources detected by ALMA and fluxes of faint sources detected with stacking, we recover a 1.1 mm surface brightness of up to 20.3 +/- 1.2 Jy/deg, comparable to the extragalactic background light measured by COBE. Based on the fractions of optically faint sources in our and previous ALMA studies and the COBE measurements, we find that approximately half of the cosmic star formation may be obscured by dust and missed by deep optical surveys, Much deeper and wider ALMA imaging is therefore needed to better constrain the obscured cosmic star formation history.

@misc{wang2016sxdfalma, abstract = {We present stacking analyses on our ALMA deep 1.1 mm imaging in the SXDF using 1.6 {\mu}m and 3.6 {\mu}m selected galaxies in the CANDELS WFC3 catalog. We detect a stacked flux of ~0.03-0.05 mJy, corresponding to LIR < 10^11 Lsun and a star formation rate (SFR) of ~ 15 Msun/yr at z = 2. We find that galaxies brighter in the rest-frame near-infrared tend to be also brighter at 1.1 mm, and galaxies fainter than m[3.6um] = 23 do not produce detectable 1.1 mm emission. This suggests a correlation between stellar mass and SFR, but outliers to this correlation are also observed, suggesting strongly boosted star formation or extremely large extinction. We also find tendencies that redder galaxies and galaxies at higher redshifts are brighter at 1.1 mm. Our field contains z ~ 2.5 H-alpha emitters and a bright single-dish source. However, we do not find evidence of bias in our results caused by the bright source. By combining the fluxes of sources detected by ALMA and fluxes of faint sources detected with stacking, we recover a 1.1 mm surface brightness of up to 20.3 +/- 1.2 Jy/deg, comparable to the extragalactic background light measured by COBE. Based on the fractions of optically faint sources in our and previous ALMA studies and the COBE measurements, we find that approximately half of the cosmic star formation may be obscured by dust and missed by deep optical surveys, Much deeper and wider ALMA imaging is therefore needed to better constrain the obscured cosmic star formation history.}, added-at = {2016-09-29T10:11:22.000+0200}, author = {Wang, Wei-Hao and Kohno, Kotaro and Hatsukade, Bunyo and Umehata, Hideki and Aretxaga, Itziar and Hughes, David and Caputi, Karina I. and Dunlop, James S. and Ikarashi, Soh and Iono, Daisuke and Ivison, Rob J. and Lee, Minju and Makiya, Ryu and Matsuda, Yuichi and Motohara, Kentaro and Nakanish, Kouichiro and Ohta, Kouji and Tadaki, Ken-ichi and Tamura, Yoichi and Kodama, Tadayuki and Rujopakarn, Wiphu and Wilson, Grant W. and Yamaguchi, Yuki and Yun, Min S. and Coupon, Jean and Hsieh, Bau-Ching and Foucaud, Sebastien}, biburl = {https://www.bibsonomy.org/bibtex/29585c83e33b6ce203993fda97116c823/miki}, description = {[1609.08772] SXDF-ALMA 2-arcmin^2 Deep Survey: Stacking of Rest-Frame Near-Infrared Selected Objects}, interhash = {732cf332a9a4c54328952270ac42a08f}, intrahash = {9585c83e33b6ce203993fda97116c823}, keywords = {dust evolution sfr}, note = {cite arxiv:1609.08772Comment: accepted for publication in ApJ}, timestamp = {2016-09-29T10:11:22.000+0200}, title = {SXDF-ALMA 2-arcmin^2 Deep Survey: Stacking of Rest-Frame Near-Infrared Selected Objects}, url = {http://arxiv.org/abs/1609.08772}, year = 2016 }