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arXiv 2106.03286astro-ph.GA
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大型毫米望远镜的早期科学:红色- $Herschel$尘埃恒星形成星系的1.1毫米AzTEC巡天

Early Science with the Large Millimeter Telescope: a 1.1 mm AzTEC Survey of Red-$Herschel$ dusty star-forming galaxies

A. Montaña, J. A. Zavala, I. Aretxaga, D. H. Hughes, R. J. Ivison, A. Pope, D. Sánchez-Argüelles, G. W. Wilson, M. Yun, O. A. Cantua, M. McCrackan, M. J. Michał… 展开作者

A. Montaña, J. A. Zavala, I. Aretxaga, D. H. Hughes, R. J. Ivison, A. Pope, D. Sánchez-Argüelles, G. W. Wilson, M. Yun, O. A. Cantua, M. McCrackan, M. J. Michałowski, E. Valiante, V. Arumugam, C. M. Casey, R. Chávez, E. Colín-Beltrán, H. Dannerbauer, J. S. Dunlop, L. Dunne, S. Eales, D. Ferrusca, V. Gómez-Rivera, A. I. Gómez-Ruiz, V. H. de la Luz, S. J. Maddox, G. Narayanan, A. Omont, I. Rodríguez-Montoya, S. Serjeant, F. P. Schloerb, M. Velázquez, S. Ventura-González, P. van der Werf, M. Zeballos

摘要:

我们目前的LMT/AzTEC 1.1毫米观测$\sim100$明亮的高红移尘埃恒星形成星系的候选人从$\sim600\,$平方。度$Herschel$ -ATLAS调查,选择的基础上,他们的SPIRE红色远红外颜色和$S_{500μ\rm m}=35-80$ mJy。利用有效的$θ_{\rm FWHM}\approx9.5\,$角秒分辨率,我们的观测结果表明,至少有9%的目标会进入具有SNR $\geq 4$成员的多个系统。如数据所示,如果一些未探测到的目标被视为多个,则多个系统的比例增加到$\sim23\,$百分比(或更多)。结合新的AzTEC和去混$Herschel$测光,我们得到光度红移,红外光度和恒星形成率。多重系统和单重系统的中位红移与$(z_{\rm med}\approx3.6)$相似,但后者的红移分布偏向更高的红移。在阿兹台克的来源中,$\sim85\,$的百分比为$z_{\rm phot}>3$,而$\sim33\,$的百分比为$z_{\rm phot}>4$。这对应于$\sim3\times10^{-7}\, \textrm{Mpc}^{-3}$的$4<z<6$的红外源空间密度的下限,对$\gtrsim 8\times10^{-4}\, \textrm{M}_\odot \textrm{yr}^{-1} \textrm{Mpc}^{-3}$的模糊恒星形成有贡献。一些多重系统的成员具有一致的光度红移,这表明可能的物理关联。考虑到它们的角距,这些系统很可能是星系超密度和/或早期的预合并。最后,我们给出了六个红$Herschel$星系在$z_{\rm spec}=3.85-6.03$的3 mm LMT/RSR光谱红移,其中两个(在$z \sim 4.7$)代表新的红移确认。在这里,我们发布了AzTEC和去混$Herschel$测光以及最有前途的相互作用系统和$z>4$星系的目录。

英文摘要:

We present LMT/AzTEC 1.1mm observations of $\sim100$ luminous high-redshift dusty star-forming galaxy candidates from the $\sim600\,$sq.deg $Herschel$-ATLAS survey, selected on the basis of their SPIRE red far-infrared colours and with $S_{500μ\rm m}=35-80$ mJy. With an effective $θ_{\rm FWHM}\approx9.5\,$ arcsec angular resolution, our observations reveal that at least 9 per cent of the targets break into multiple systems with SNR $\geq 4$ members. The fraction of multiple systems increases to $\sim23\,$ per cent (or more) if some non-detected targets are considered multiples, as suggested by the data. Combining the new AzTEC and deblended $Herschel$ photometry we derive photometric redshifts, IR luminosities, and star formation rates. While the median redshifts of the multiple and single systems are similar $(z_{\rm med}\approx3.6)$, the redshift distribution of the latter is skewed towards higher redshifts. Of the AzTEC sources $\sim85\,$ per cent lie at $z_{\rm phot}>3$ while $\sim33\,$ per cent are at $z_{\rm phot}>4$. This corresponds to a lower limit on the space density of ultra-red sources at $4<z<6$ of $\sim3\times10^{-7}\, \textrm{Mpc}^{-3}$ with a contribution to the obscured star-formation of $\gtrsim 8\times10^{-4}\, \textrm{M}_\odot \textrm{yr}^{-1} \textrm{Mpc}^{-3}$. Some of the multiple systems have members with photometric redshifts consistent among them suggesting possible physical associations. Given their angular separations, these systems are most likely galaxy over-densities and/or early-stage pre-coalescence mergers. Finally, we present 3mm LMT/RSR spectroscopic redshifts of six red-$Herschel$ galaxies at $z_{\rm spec}=3.85-6.03$, two of them (at $z \sim 4.7$) representing new redshift confirmations. Here we release the AzTEC and deblended $Herschel$ photometry as well as catalogues of the most promising interacting systems and $z>4$ galaxies.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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