High spatial resolution observations of CUDSS14A: a SCUBA-selected ultraluminous galaxy at high redshift
High spatial resolution observations of CUDSS14A: a SCUBA-selected ultraluminous galaxy at high redshift
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CUDSS14A 的高空间分辨率观测：水肺选择的高红移超发光星系
DOI：
10.1046/j.1365-8711.2000.03822.x
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发表时间：
2000
影响因子：
4.8
通讯作者：
L. Dunne
中科院分区：
文献类型：
--
作者：
W. Gear;S. Lilly;J. Stevens;D. Clements;T. Webb;S. Eales;L. Dunne
我们给出了一张高分辨率的毫米干涉图像，它是从加拿大-英国深海潜水调查(CUDSS)中挑选出来的最亮的SCUBA星系。我们在1.3毫米处进行了非常清晰的探测，但未能解析震源中的任何结构。干涉位置距离Scuba 850�m质心不到1.5角秒，距离44�Jy射电源和一个非常暗、极红的星系也不到1.5角秒，我们之前发现这个星系是亚毫米级的射电源。我们还介绍了这种光源的新的光学和红外成像以及红外光谱。我们模拟了整个光谱能量分布，并得出结论，它位于2<；z<；4.5的红移范围内。在约束范围内，CuDSS14A的亚毫米/FIR光度与红移的关系非常弱，约为4×1012 L⊙(H0=75，假设为类Arp220光谱)，这意味着恒星形成率为�1000M⊙yr−1。我们得到的气体质量约为�1010M⊙，这意味着目前的恒星形成活动不可能持续超过1000万年。然而，根据目前的数据，我们不能排除活动星系核对总光度的显著贡献。
We present a high-resolution millimetre interferometric image of the brightest SCUBAselected galaxy from the Canada-UK deep SCUBA survey (CUDSS). We make a very clear detection at 1.3 mm, but fail to resolve any structure in the source. The interferometric position is within 1.5 arcsec of the SCUBA 850 � m centroid, and also within 1.5 arcsec of a 44 � Jy radio source and a very faint, extremely red galaxy which we had previously identified as the submillimetre source. We also present new optical and infrared imaging, and infrared spectroscopy of this source. We model the overall spectral energy distribution and conclude that it lies within the redshift range 2< z < 4.5. The submm/FIR luminosity of CUDSS14A is very weakly dependent on redshift within the constrained range, and is roughly 4×10 12 L⊙ (for H0=75 and an assumed Arp220-like spectrum), which implies a star-formation rate �1000 M⊙ yr −1 . We derive an approximate gas mass of � 10 10 M⊙ which would imply the current starforming activity cannot be sustained for longer than about 10 million years. With the present data however we are unable to rule out a significant AGN contribution to the total luminosity.
加拿大本地债券 (2)
DOI：
--
发表时间：
2006
期刊：
Chihosai Geppo 329
影响因子：
--
作者：
IKEGAMI;Takehiko
通讯作者：
Takehiko