SXDF-ALMA 2-arcmin^2 Deep Survey: Stacking of Rest-Frame Near-Infrared Selected Objects
Wei-Hao Wang, Kotaro Kohno, Bunyo Hatsukade, Hideki Umehata, Itziar Aretxaga, David Hughes, Karina I. Caputi, James S. Dunlop, Soh Ikarashi, Daisuke Iono, Rob J… 展开作者
Wei-Hao Wang, Kotaro Kohno, Bunyo Hatsukade, Hideki Umehata, Itziar Aretxaga, David Hughes, Karina I. Caputi, James S. Dunlop, Soh Ikarashi, Daisuke Iono, Rob J. Ivison, Minju Lee, Ryu Makiya, Yuichi Matsuda, Kentaro Motohara, Kouichiro Nakanish, Kouji Ohta, Ken-ichi Tadaki, Yoichi Tamura, Tadayuki Kodama, Wiphu Rujopakarn, Grant W. Wilson, Yuki Yamaguchi, Min S. Yun, Jean Coupon, Bau-Ching Hsieh, Sebastien Foucaud
We present stacking analyses on our ALMA deep 1.1 mm imaging in the SXDF using 1.6 μm and 3.6 μm 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.
ALMA 26 Arcmin$^{2}$ Survey of GOODS-S at One-millimeter (ASAGAO): Average Morphology of High-$z$ Dusty Star-Forming Galaxies is an Exponential-Disk ($n \simeq 1$)
The CO Luminosity Density at High-z (COLDz) Survey: A Sensitive, Large Area Blind Search for Low-J CO Emission from Cold Gas in the Early Universe with the Karl G. Jansky Very Large Array
ALMA spectroscopic survey in the Hubble Ultra Deep Field: Continuum number counts, resolved 1.2-mm extragalactic background, and properties of the faintest dusty star forming galaxies
我们提出了一个深（1 $σ$ =13 $μ$ Jy）宇宙学1.2毫米连续谱图的基础上ASPECS，ALMA光谱调查在哈勃超深场的分析。在1弧分$^2$所涵盖的ASPECS，我们检测到9个源在$>3.5σ$的意义在1.2毫米。我们的ALMA-选择的样本有一个中位数红移$z=1.6\pm0.4$，只有一个星系检测到z $>$ 2内的调查区域。该值明显低于在较高通量密度截止和类似频率下选择的毫米样品中发现的值。大多数星系的恒星形成率与主序星相同，我们分别得到了恒星质量和恒星形成率的中值为$4.0\times10^{10}\ M_\odot$和$\sim40~M_\odot$ yr $^{-1}$。使用的尘埃排放作为示踪剂的ISM质量，我们推导出的耗尽时间，通常长于300万年，我们发现分子气体分数范围从$\sim$ 0.1到1.0。正如以前的研究所指出的，这些值比使用基于CO的ISM估计值低一个因子$\sim$ 2。1 mm的计数（校正保真度和完整性）与以前的研究，通常限于较亮的来源是一致的。我们的个人检测，我们恢复$55\pm4\%$的河外背景光（EBL）在1.2毫米测量的普朗克卫星，我们恢复$80\pm7\%$的EBL，如果我们包括明亮端的数量计数和额外的检测叠加。堆积的贡献主要是星系在$z\sim1-2$，与恒星质量（1-3）$\times$ 10 $^{10}$ M $_\odot…
ALMA Spectroscopic Survey in the Hubble Ultra Deep Field: The Infrared Excess of UV-selected z=2-10 galaxies as a function of UV-continuum Slope and Stellar Mass
The SCUBA-2 Cosmology Legacy Survey: The EGS deep field I - Deep number counts and the redshift distribution of the recovered Cosmic Infrared Background at 450 and 850 um
