arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0904.1206astro-ph.CO
收藏

BLAST:恒星形成历史的远红外测量

BLAST: A Far-Infrared Measurement of the History of Star Formation

Enzo Pascale, Peter A. R. Ade, James J. Bock, Edward L. Chapin, Mark J. Devlin, Simon Dye, Steve A. Eales, Matthew Griffin, Joshua O. Gundersen, Mark Halpern, P… 展开作者

Enzo Pascale, Peter A. R. Ade, James J. Bock, Edward L. Chapin, Mark J. Devlin, Simon Dye, Steve A. Eales, Matthew Griffin, Joshua O. Gundersen, Mark Halpern, Peter C. Hargrave, David H. Hughes, Jeff Klein, Gaelen Marsden, Philip Mauskopf, Lorenzo Moncelsi, Calvin B. Netterfield, Henry Ngo, Luca Olmi, Guillaume Patanchon, Marie Rex, Douglas Scott, Christopher Semisch, Nicholas Thomas, Matthew D. P. Truch, Carole Tucker, Gregory S. Tucker, Marco P. Viero, Donald V. Wiebe

摘要:

我们直接测量红移的平均物理性质(远红外光度,温度和质量)的星系,产生宇宙红外背景(CIB)的演化,使用测量的大口径亚毫米望远镜(BLAST),和斯皮策约束CIB发射峰。这个样本在BLAST波段中产生的表面亮度与完整的CIB一致,并且所有物体的光度红移都被确定。我们发现,大多数70微米的背景是在z <~ 1时产生的,而500微米的背景是在z >~ 1时产生的。观测到平均光度从~ 10^9 - 10^12 L_sun显著增加,平均温度从0< z < 3增加到10 K。然而,在相同的红移范围内,这些星系中的共动尘埃质量只有微弱的正演化。我们还测量了这些天体的远红外光度密度的演化和恒星形成率的历史,在z ~1范围内与其他红外研究结果吻合良好,超过了光学选择星系的贡献。

英文摘要:

We directly measure redshift evolution in the mean physical properties (far-infrared luminosity, temperature, and mass) of the galaxies that produce the cosmic infrared background (CIB), using measurements from the Balloon-borne Large Aperture Sub-millimeter Telescope (BLAST), and Spitzer which constrain the CIB emission peak. This sample is known to produce a surface brightness in the BLAST bands consistent with the full CIB, and photometric redshifts are identified for all of the objects. We find that most of the 70 micron background is generated at z <~ 1 and the 500 micron background generated at z >~ 1. A significant growth is observed in the mean luminosity from ~ 10^9 - 10^12 L_sun, and in the mean temperature by 10 K, from redshifts 0< z < 3. However, there is only weak positive evolution in the comoving dust mass in these galaxies across the same redshift range. We also measure the evolution of the far-infrared luminosity density, and the star-formation rate history for these objects, finding good agreement with other infrared studies up to z ~1, exceeding the contribution attributed to optically-selected 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。

↑