Characterizing the evolving K-band luminosity function using the UltraVISTA, CANDELS and HUDF surveys
Characterizing the evolving K-band luminosity function using the UltraVISTA, CANDELS and HUDF surveys
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使用 UltraVISTA、CANDELS 和 HUDF 调查表征不断演变的 K 波段光度函数
DOI：
10.1093/mnras/stw2728
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发表时间：
2017
影响因子：
4.8
通讯作者：
V. Bruce
中科院分区：
文献类型：
--
作者：
A. Mortlock;R. McLure;R. Bowler;R. Bowler;D. McLeod;E. Mármol;S. Parsa;J. Dunlop;V. Bruce
基于UltraVISTA、Cosmic Assembly近红外深遗产河外巡天和HUDF巡天的嵌套组合，我们提出了一项关于红移z≤3.75处k波段星系光度函数（KLF）的新研究结果。这个新数据集所跨越的大动态亮度范围（在全红移范围内的3-4指数）足以首次清楚地证明，在z≥0.25处KLF的暗端斜率相对陡峭（单个Schechter函数为- 1.3≤α≤- 1.5），与最近的理论和现象学模型很好地一致。此外，基于我们的新数据集，我们发现双Schechter函数提供了z≤2时KLF的显著改进描述。在红移z≥0.25时，KLF的演化非常平滑，在暗星等（MK≥- 20.5）或亮星等（MK≤- 24.5）时演化很少或不明显。在红移区间0.25≤z≤3.75时，在MK≤23处的星系数量密度下降了1倍。基于此，我们探索了一种基于双Schechter函数的演化KLF的简单描述，该函数具有固定的模糊端斜率（α1 = - 0.5, α2 = - 1.5）和共享的特征幅度（M - - K - - MK - -）。根据该参数化，占KLF微弱端的分量的归一化保持近似常数，其中
We present the results of a new study of the K-band galaxy luminosity function (KLF) at redshifts z ≤ 3.75, based on a nested combination of the UltraVISTA, Cosmic Assembly Near-infrared Deep Legacy Extragalactic Survey and HUDF surveys. The large dynamic range in luminosity spanned by this new data set (3–4 dex over the full redshift range) is sufficient to clearly demonstrate for the first time that the faint-end slope of the KLF at z ≥ 0.25 is relatively steep (−1.3 ≤ α ≤ −1.5 for a single Schechter function), in good agreement with recent theoretical and phenomenological models. Moreover, based on our new data set, we find that a double Schechter function provides a significantly improved description of the KLF at z ≤ 2. At redshifts z ≥ 0.25, the evolution of the KLF is remarkably smooth, with little or no evolution evident at faint (MK ≥ −20.5) or bright magnitudes (MK ≤ −24.5). Instead, the KLF is seen to evolve rapidly at intermediate magnitudes, with the number density of galaxies at MK ≃−23 dropping by a factor of ≃5 over the redshift interval 0.25 ≤ z ≤ 3.75. Motivated by this, we explore a simple description of the evolving KLF based on a double Schechter function with fixed faint-end slopes (α1 = −0.5, α2 = −1.5) and a shared characteristic magnitude (M⋆K MK⋆). According to this parametrization, the normalization of the component which dominates the faint end of the KLF remains approximately constant, with
ϕ⋆2 ϕ2⋆ decreasing by only a factor of ≃2 between z ≃0 and 3.25. In contrast, the component which dominates the bright end of the KLF at low redshifts evolves dramatically, becoming essentially negligible by z ≃3. Finally, we note that within this parametrization, the observed evolution of
M⋆K MK⋆between z ≃0 and 3.25 is entirely consistent with M⋆K MK⋆ corresponding to a constant stellar mass of M⋆ ≃5 × 1010 M⊙ at all redshifts.
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DOI：
10.1086/516587
发表时间：
2006-12
期刊：
The Astrophysical Journal Supplement Series
影响因子：
--
作者：
E. Schinnerer;V. Smolčić;C. Carilli;M. Bondi;P. Ciliegi;K. Jahnke;N. Scoville;H. Aussel;F. Bertoldi;A. Blain;C. Impey;A. Koekemoer;O. Fèvre;C. M. U. Mpia;Nrao;-INAF;Caltech;CEASaclay;AIfA;U. Arizona;Stsci;Lam;Yale
通讯作者：
E. Schinnerer;V. Smolčić;C. Carilli;M. Bondi;P. Ciliegi;K. Jahnke;N. Scoville;H. Aussel;F. Bertoldi;A. Blain;C. Impey;A. Koekemoer;O. Fèvre;C. M. U. Mpia;Nrao;-INAF;Caltech;CEASaclay;AIfA;U. Arizona;Stsci;Lam;Yale
DOI：
10.1088/0004-637x/769/1/80
发表时间：
2013-05
期刊：
The Astrophysical Journal
影响因子：
--
作者：
M. Ashby;S. Willner;G. Fazio;J.-S. Huang;R. Arendt;P. Barmby;G. Barro;E. Bell;R. Bouwens
通讯作者：
M. Ashby;S. Willner;G. Fazio;J.-S. Huang;R. Arendt;P. Barmby;G. Barro;E. Bell;R. Bouwens
影响因子：
6.5
作者：
McCracken, H. J.;Milvang-Jensen, B.;Zabl, J.
通讯作者：
Zabl, J.
星系和质量组装 (GAMA)：ugrizYJHK Sérsic 光度函数和哈勃类型的宇宙光谱能量分布
影响因子：
4.8
作者：
Kelvin L
通讯作者：
Kelvin L