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arXiv 1102.2311astro-ph.CO
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重子Tully-Fisher关系在过去6 Gyr的演化

The Evolution of the Baryonic Tully-Fisher Relation over the past 6 Gyr

M. Puech, F. Hammer, H. Flores, R. Delgado-Serrano, M. Rodrigues, Y. B. Yang

摘要:

标度关系是星系演化和形成模型的重要组成部分。我总结的结果,从ICOMI调查,它结合了空间分辨的运动学从火焰/GIRAFFE从HST/ACS和其他设施的成像。具体来说,我将集中在恒星质量和重子塔利-费舍尔关系(TFR)从z=0.6到z=0的演变。我们发现了一个显着的演变,在零点和恒星质量TFR的散射相比,当地的宇宙。结合由Schmidt-Kennicutt关系反演得到的气体分数,我们首次导出了高红移下的重子TFR。与恒星质量TFR相反,重子关系似乎并没有在零点演化,这表明在过去的6 Gyr中,大部分转化为恒星的气体已经被引力束缚在z=0.6的星系中。

英文摘要:

Scaling relations are salient ingredients of galaxy evolution and formation models. I summarize results from the IMAGES survey, which combines spatially-resolved kinematics from FLAMES/GIRAFFE with imaging from HST/ACS and other facilities. Specifically, I will focus on the evolution of the stellar mass and baryonic Tully-Fisher Relations (TFR) from z=0.6 down to z=0. We found a significant evolution in zero point and scatter of the stellar mass TFR compared to the local Universe. Combined with gas fractions derived by inverting the Schmidt-Kennicutt relation, we derived for the first time a baryonic TFR at high redshift. Conversely to the stellar mass TFR, the baryonic relation does not appear to evolve in zero point, which suggests that most of the reservoir of gas converted into stars over the past 6 Gyr was already gravitationally bound to galaxies at z=0.6.

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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