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arXiv 1202.1829astro-ph.CO
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一个强透镜普朗克相关亚毫米星系的综合观察

A Comprehensive View of a Strongly Lensed Planck-Associated Submillimeter Galaxy

Hai Fu, E. Jullo, A. Cooray, R. S. Bussmann, R. J. Ivison, I. Perez-Fournon, S. G. Djorgovski, N. Scoville, L. Yan, D. A. Riechers, J. Aguirre, R. Auld, M. Baes… 展开作者

Hai Fu, E. Jullo, A. Cooray, R. S. Bussmann, R. J. Ivison, I. Perez-Fournon, S. G. Djorgovski, N. Scoville, L. Yan, D. A. Riechers, J. Aguirre, R. Auld, M. Baes, A. J. Baker, M. Bradford, A. Cava, D. L. Clements, H. Dannerbauer, A. Dariush, G. De Zotti, H. Dole, L. Dunne, S. Dye, S. Eales, D. Frayer, R. Gavazzi, M. Gurwell, A. I. Harris, D. Herranz, R. Hopwood, C. Hoyos, E. Ibar, M. J. Jarvis, S. Kim, L. Leeuw, R. Lupu, S. Maddox, P. Martinez-Navajas, M. J. Michalowski, M. Negrello, A. Omont, M. Rosenman, D. Scott, S. Serjeant, I. Smail, A. M. Swinbank, E. Valiante, A. Verma, J. Vieira, J. L. Wardlow, P. van der Werf

摘要:

我们提出了一个强透镜亚毫米星系(SMG)在z = 3.259的恒星,尘埃和分子气体的高分辨率地图。HATLAS 12 - 00是从赫歇尔天体物理太赫兹大区域巡天(H-ATLAS)中选出的强透镜候选者,主要是基于其异常高的500 μ m通量密度(~300 mJy)。这是在130 deg^2 H-ATLAS第一阶段区域中唯一的高红移普朗克探测。凯克自适应光学图像揭示了一个四重成像的星系在K波段,而亚毫米阵列和扩展的超大阵列显示双重成像的880微米和CO(1-0)源,表明不同的分布在星系中的各种成分。在源平面,恒星存在于三个主要的kpc尺度的团块中,这些团块延伸到约1.6 kpc,尘埃在恒星以北约3 kpc的致密区域(约1 kpc),而冷分子气体则在恒星东北约5 kpc的扩展盘(约7 kpc)中。来自恒星、尘埃和气体的辐射分别被z ~ 1的四个透镜星系放大了~17、8和7倍。在内部,透镜星系是一个温暖的(T_dust ~ 40-65 K),超亮(L_IR ~ 1.7 e13 Lsun; SFR ~ 2000 Msun/yr),富含气体(M_gas/M_baryon ~ 70%),年轻(M_stellar/SFR ~ 20 Myr)和短寿命(M_gas/SFR ~ 40 Myr)的星暴,没有显著的活动星系核。HATLAS 12 - 00的物理特性与非透镜z > 2 SMG相似,通过强大的宇宙显微镜提供了典型SMG的详细视图。

英文摘要:

We present high-resolution maps of stars, dust, and molecular gas in a strongly lensed submillimeter galaxy (SMG) at z = 3.259. HATLAS12--00 is selected from the Herschel-Astrophysical Terahertz Large Area Survey (H-ATLAS) as a strong lens candidate mainly based on its unusually high 500um flux density (~300 mJy). It is the only high-redshift Planck detection in the 130 deg^2 H-ATLAS Phase 1 area. Keck Adaptive Optics images reveal a quadruply imaged galaxy in the K-band while the Submillimeter Array and the Extended Very Large Array show doubly imaged 880um and CO(1-0) sources, indicating differentiated distributions of the various components in the galaxy. In the source plane, the stars reside in three major kpc-scale clumps extended over ~1.6 kpc, the dust in a compact (~1 kpc) region ~3 kpc north of the stars, and the cold molecular gas in an extended (~7 kpc) disk ~5 kpc northeast of the stars. The emission from the stars, dust, and gas are magnified by ~17, 8, and 7 times, respectively, by four lensing galaxies at z ~ 1. Intrinsically, the lensed galaxy is a warm (T_dust ~ 40-65 K), hyper-luminous (L_IR ~ 1.7e13 Lsun; SFR ~ 2000 Msun/yr), gas-rich (M_gas/M_baryon ~ 70%), young (M_stellar/SFR ~ 20 Myr), and short-lived (M_gas/SFR ~ 40 Myr) starburst, without a significant active galactic nucleus. With physical properties similar to unlensed z > 2 SMGs, HATLAS12--00 offers a detailed view of a typical SMG through a powerful cosmic microscope.

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