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arXiv 1109.2887astro-ph.CO
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Herschel多层河外巡天:SPIRE-mm测光红移

The Herschel Multi-Tiered Extragalactic Survey: SPIRE-mm Photometric Redshifts

I. G. Roseboom, R. J. Ivison, T. R. Greve, A. Amblard, V. Arumugam, R. Auld, H. Aussel, M. Bethermin, A. Blain, J. Bock, A. Boselli, D. Brisbin, V. Buat, D. Bur… 展开作者

I. G. Roseboom, R. J. Ivison, T. R. Greve, A. Amblard, V. Arumugam, R. Auld, H. Aussel, M. Bethermin, A. Blain, J. Bock, A. Boselli, D. Brisbin, V. Buat, D. Burgarella, N. Castro-Rodriguez, A. Cava, P. Chanial, E. Chapin, S. Chapman, D. L. Clements, A. Conley, L. Conversi, A. Cooray, C. D. Dowell, J. S. Dunlop, E. Dwek, S. Eales, D. Elbaz, D. Farrah, A. Franceschini, J. Glenn, M. Griffin, M. Halpern, E. Hatziminaoglou, E. Ibar, K. Isaak, G. Lagache, L. Levenson, N. Lu, S. Madden, B. Maffei, G. Mainetti, L. Marchetti, G. Marsden, G. Morrison, A. M. J. Mortier, H. T. Nguyen, B. O'Halloran, S. J. Oliver, A. Omont, M. J. Page, P. Panuzzo, A. Papageorgiou, C. P. Pearson, I. Perez-Fournon, M. Pohlen, J. I. Rawlings, G. Raymond, D. Rigopoulou, D. Rizzo, G. Rodighiero, M. Rowan-Robinson, B. Schulz, Douglas Scott, N. Seymour, D. L. Shupe, A. J. Smith, J. A. Stevens, M. Symeonidis, M. Trichas, K. E. Tugwell, M. Vaccari, I. Valtchanov, J. D. Vieira, M. P. Viero, L. Vigroux, J. Wardlow, L. Wang, G. Wright, C. K. Xu, M. Zemcov

摘要:

我们利用赫歇尔卫星上SPIRE仪器在250、350和500 μm波段观测到的毫米选择源样品研究了亚毫米和亚毫米射电测光红移的可能性。从63个先前确定的毫米源与可靠的无线电识别在GOODS-N和洛克曼洞北字段46(73%)的样本被发现在至少一个SPIRE波段的检测。我们研究了观测到的submm/mm颜色随红移的演化,发现mm光源的颜色可以用一个具有恒定光学深度τ =(ν/ν0)^β的修正黑体来描述,其中β = +1.8和ν0 = c/100 μm。我们发现尘埃温度和红外光度之间的紧密相关性。使用一个单一的模型的尘埃温度和红外光度的关系,我们得到光度红移估计的46 SPIRE检测毫米源。对22个已知光谱或高质量光学/近红外光度红移的源进行测试,我们发现submm/mm光度红移提供了|z| /(1+z)= 0.16(= 0.51)的红移精度< |z| >。包括来自无线电-远IR相关的约束,精度提高到|z| /(1 + z)= 0.15(< |z| >= 0.45)。我们估计了mm选择源的红移分布,发现与~ 850 μm选择的样品相比,在z &gt; 3处显著过量。

英文摘要:

We investigate the potential of submm-mm and submm-mm-radio photometric redshifts using a sample of mm-selected sources as seen at 250, 350 and 500 μm by the SPIRE instrument on Herschel. From a sample of 63 previously identified mm-sources with reliable radio identifications in the GOODS-N and Lockman Hole North fields 46 (73 per cent) are found to have detections in at least one SPIRE band. We explore the observed submm/mm colour evolution with redshift, finding that the colours of mm-sources are adequately described by a modified blackbody with constant optical depth τ = (ν/ν0)^β where β = +1.8 and ν0 = c/100 μm. We find a tight correlation between dust temperature and IR luminosity. Using a single model of the dust temperature and IR luminosity relation we derive photometric redshift estimates for the 46 SPIRE detected mm-sources. Testing against the 22 sources with known spectroscopic, or good quality optical/near-IR photometric, redshifts we find submm/mm photometric redshifts offer a redshift accuracy of |z|/(1+z) = 0.16 (< |z| >= 0.51). Including constraints from the radio-far IR correlation the accuracy is improved to |z|/(1 + z) = 0.15 (< |z| >= 0.45). We estimate the redshift distribution of mm-selected sources finding a significant excess at z > 3 when compared to ~ 850 μm selected samples.

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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