论文标题
使用NOEMA使用NOEMA的Z $ _ {[CII]} $ _ {[CII]} $ _ {[CII]} $ _时的重力镜头莱曼破裂星系的光谱镜头确认
Spectroscopic confirmation of a gravitationally lensed Lyman break galaxy at z$_{[CII]}$ = 6.827 using NOEMA
论文作者
论文摘要
我们通过在Z = 6.8269 +/- 0.0004的红移时检测[C II]，介绍了在回报时期的最明亮已知重力镜头莱曼破裂星系A1703-ZD1中的光谱证实。该消息来源是在强烈的镜头集群Abell 1703后面选择的，具有内在的L $ _ {uv} $ 〜l $^*$^*$$ _ {z = 7} $亮度和非常蓝色的spitzer/irac [3.6] - [4.5]颜色，暗示高度宽等于[O IIII]+H $β$。 [C II]可靠地检测到6.1 $σ$共同空间与剩下的紫外线对应物，显示出相似的空间范围。校正镜头放大倍数，A1703 -ZD1中的[C II]光度与局部L $ _ {[CII]} $ -SFR关系广泛一致。我们发现整个源的明显速度梯度为103 +/- 22 km/s，这可能表明旋转或正在进行的合并。此外，我们目前的光谱扫描未检测到[C II]以上的[C II] 4.6 $σ$，在EGS -Candels Field的两个放大的Lyman破裂星系中，Z〜6.6-6.9。这是第一次在z> 6的“正常”星形星系中成功地使用Noema来观察[C II]，我们的结果证明了它在确认Alma的能力中证实了在Reionisation时期确认星系的能力。
We present the spectroscopic confirmation of the brightest known gravitationally lensed Lyman break galaxy in the Epoch of Reionisation, A1703-zD1, through the detection of [C II] at a redshift of z = 6.8269 +/- 0.0004. This source was selected behind the strong lensing cluster Abell 1703, with an intrinsic L$_{UV}$ ~ L$^*$$_{z=7}$ luminosity and a very blue Spitzer/IRAC [3.6]-[4.5] colour, implying high equivalent width line emission of [O III]+H$β$. [C II] is reliably detected at 6.1$σ$ co-spatial with the rest-frame UV counterpart, showing similar spatial extent. Correcting for the lensing magnification, the [C II] luminosity in A1703-zD1 is broadly consistent with the local L$_{[CII]}$ - SFR relation. We find a clear velocity gradient of 103 +/- 22 km/s across the source which possibly indicates rotation or an ongoing merger. We furthermore present spectral scans with no detected [C II] above 4.6$σ$ in two unlensed Lyman break galaxies in the EGS-CANDELS field at z ~ 6.6 - 6.9. This is the first time that NOEMA has been successfully used to observe [C II] in a 'normal' star-forming galaxy at z > 6, and our results demonstrate its capability to complement ALMA in confirming galaxies in the Epoch of Reionisation.
