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首页> 外文期刊>PASJ: Publications of the Astronomical Society of Japan >ALMA deep field in SSA22: Survey design and source catalog of a 20 arcmin(2) survey at 1.1 mm
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ALMA deep field in SSA22: Survey design and source catalog of a 20 arcmin(2) survey at 1.1 mm

机译：SSA22中的Alma Deep Field：调查设计和20 Arcmin（2）调查的调查设计和源目录下1.1毫米

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摘要

To search for dust-obscured star-formation activity in the early Universe, it is essential to obtain a deep and wide submillimeter/millimeter map. The advent of the Atacama Large Millimeter/submillimeter Array (ALMA) has enabled us to obtain such maps with sufficiently high spatial resolution to be free from source confusion. We present a new 1.1 mm-wave map obtained by ALMA in the SSA22 field. The field contains a remarkable proto-cluster at z = 3.09; therefore, it is an ideal region to investigate the role of a large-scale cosmic web on dust-obscured star formation. The typical 1 sigma depth of our map is 73 mu Jy beam(-1) with a 0.'' 5 resolution. Combining the present survey with earlier, archived observations, we map an area of 20 arcmin(2) (71 comoving Mpc(2) at z = 3.09). Within the combined survey area we have detected 35 sources at a signal-to-noise ratio (S/N) 5, with flux densities of S-1.1 mm = 0.43-5.6 mJy, equivalent to star-formation rates of greater than or similar to 100-1000 M-circle dot yr(-1) at z = 3.09, for a Chabrier initial mass function: 17 sources out of 35 are new detections. The cumulative number counts show an excess by a factor of three to five compared to blank fields. The excess suggests enhanced, dust-enshrouded star-formation activity in the proto-cluster on a 10 comoving Mpc scale, indicating accelerated galaxy evolution in this overdense region.
机译：为了在早期宇宙中寻找尘埃遮挡的星形活动，必须获得深层和宽的淹没/毫米地图。 Atacama大型毫米/亚颌骨阵列（ALMA）的出现使我们能够获得具有足够高空间分辨率的这样的地图，以免于源混乱。我们在SSA22领域中提出了通过ALMA获得的新的1.1 mm波图。该字段包含z = 3.09的显着原型簇;因此，它是研究大型宇宙网对尘埃遮挡星形成的作用的理想区域。我们地图的典型1 Sigma深度为73米JY梁（-1），5分辨率为0.'分辨率。将本调查与前面的归档观察结合起来，我们将20个Accmin（2）（71 Comoving MPC（2）的区域映射到Z = 3.09）。在组合的调查区域内，我们以信噪比（S / N）＆gt检测到35个源。 5，具有S-1.1mm = 0.43-5.6米的磁通密度，相当于Z = 3.09的恒星形成速率大于或类似于100-1000 m圆点Yr（-1），用于切叉初始质量功能：35中的17个源是新检测。与空白字段相比，累积数量计数显示超过三到五倍。过量表明，在10个Clocing的MPC秤上的ProTo-Cluster中提出了增强的灰尘浓度的星形形成活性，表明该过阵地区的加速星系演变。

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