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arXiv 1005.2187astro-ph.COastro-ph.GA
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HerMES SPIRE亚毫米局域光度函数

The HerMES SPIRE submillimeter local luminosity function

M. Vaccari, L. Marchetti, A. Franceschini, B. Altieri, A. Amblard, V. Arumugam, R. Auld, H. Aussel, T. Babbedge, A. Blain, J. Bock, A. Boselli, V. Buat, D. Burg… 展开作者

M. Vaccari, L. Marchetti, A. Franceschini, B. Altieri, A. Amblard, V. Arumugam, R. Auld, H. Aussel, T. Babbedge, A. Blain, J. Bock, A. Boselli, V. Buat, D. Burgarella, N. Castro-Rodriguez, A. Cava, P. Chanial, D. L. Clements, A. Conley, L. Conversi, A. Cooray, C. D. Dowell, E. Dwek, S. Dye, S. Eales, D. Elbaz, D. Farrah, M. Fox, W. Gear, J. Glenn, E. A. Gonzalez Solares, M. Griffin, M. Halpern, E. Hatziminaoglou, J. Huang, E. Ibar, K. Isaak, R. J. Ivison, G. Lagache, L. Levenson, N. Lu, S. Madden, B. Maffei, G. Mainetti, 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, I. G. Roseboom, M. Rowan-Robinson, M. Sanchez Portal, B. Schulz, Douglas Scott, N. Seymour, D. L. Shupe, A. J. Smith, J. A. Stevens, M. Symeonidis, M. Trichas, K. E. Tugwell, E. Valiante, I. Valtchanov, L. Vigroux, L. Wang, R. Ward, G. Wright, C. K. Xu, M. Zemcov

摘要:

局域光度函数是高红移星系形成和演化研究以及描述这些过程的模型的基本基准。确定亚毫米波段的局部光度函数有助于更好地约束局部宇宙中的辐射热光度密度,赫歇尔通过在几个亚毫米波段对大的天空区域进行成像,提供了第一个以无偏的方式这样做的机会。我们基于来自HerMES Herschel关键计划的SPIRE数据,首次对亚毫米波0<z<0.2的局部光度函数和红外测热(8-1000 $μ$ m)局部光度密度进行了Herschel测量,测量范围为14.7 deg^2。在250、350和500 \mum的三个SPIRE通道中的通量测量与斯皮策测光和档案数据相结合。我们拟合观测到的SPIRE源的光学到亚毫米光谱能量分布,并使用1/ V_{max}估计器来提供对单色250、350和500 \mum以及基于Herschel数据的红外测热(8-1000 \mum)局部光度函数的第一约束。我们比较我们的结果与建模预测,并发现一个更丰富的本地亚毫米人口比预测的一些模型。我们对红外测辐射热(8-1000 \mum)局部光度函数的测量表明,在低光度时,局部光度函数的斜率是平坦的,由此推断出的局部光度密度为1.31 -0.21^+0.24 x 10^8 Lsun Mpc^-3,与最近文献报道的数值范围一致。

英文摘要:

Local luminosity functions are fundamental benchmarks for high-redshift galaxy formation and evolution studies as well as for models describing these processes. Determining the local luminosity function in the submillimeter range can help to better constrain in particular the bolometric luminosity density in the local Universe, and Herschel offers the first opportunity to do so in an unbiased way by imaging large sky areas at several submillimeter wavelengths. We present the first Herschel measurement of the submillimeter 0<z<0.2 local luminosity function and infrared bolometric (8-1000 $μ$m) local luminosity density based on SPIRE data from the HerMES Herschel Key Program over 14.7 deg^2. Flux measurements in the three SPIRE channels at 250, 350 and 500 \mum are combined with Spitzer photometry and archival data. We fit the observed optical-to-submillimeter spectral energy distribution of SPIRE sources and use the 1/V_{max} estimator to provide the first constraints on the monochromatic 250, 350 and 500 \mum as well as on the infrared bolometric (8-1000 \mum) local luminosity function based on Herschel data. We compare our results with modeling predictions and find a slightly more abundant local submillimeter population than predicted by a number of models. Our measurement of the infrared bolometric (8-1000 \mum) local luminosity function suggests a flat slope at low luminosity, and the inferred local luminosity density, 1.31_-0.21^+0.24 x 10^8 Lsun Mpc^-3, is consistent with the range of values reported in recent literature.

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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