CFHTLenS: higher order galaxy–mass correlations probed by galaxy–galaxy–galaxy lensing

CFHTLenS: higher order galaxy–mass correlations probed by galaxy–galaxy–galaxy lensing
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CFHTLenS:通过星系-星系-星系透镜探测的高阶星系-质量相关性

DOI:
10.1093/mnras/stt069
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发表时间:
2013
影响因子:
4.8
通讯作者:
Schneider
Schneider
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Simon P;Schneider

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我们提出了星系-物质双光谱作为星系光度、恒星质量和光谱能量分布(SED)类型的函数的第一个直接测量。我们的分析使用了星系-星系-星系透镜技术(G3L),在9角秒到50角秒之间的角尺度上,量化了(i)星系对周围的多余表面质量密度(以下简称多余质量)和(ii)单个星系周围的多余剪切-剪切相关性,两者都产生了两种类型的星系-物质双光谱的测量。我们将我们的方法应用于最先进的加拿大-法国-夏威夷望远镜透镜调查(CFHTLenS),跨越154平方度。这项调查使我们能够检测到双光谱与透镜特性的显著变化。具有不同红移分布的透镜群的测量可以通过一种新设计的归一化技术进行比较。这也有助于将来与其他调查或模拟进行比较。归一化G3L统计量与- 23≤Mr≤- 18范围内的光度和5 × 109M⊙≤M*≤2 × 1011M⊙范围内的恒星质量有显著的相关性(h= 0.73)。对于更明亮的透镜或恒星质量更高的透镜(高达2-3倍),两种双光谱都表现出更强的信号。这是伴随着一个更陡峭的等边双谱为更明亮或更高的恒星质量透镜为多余的质量。重要的是,我们发现多余的质量对星系类型非常敏感,正如最近用半解析星系模型预测的那样:发光(Mr< - 21)晚型星系没有可检测到的信号,而所有在发光星系中检测到的多余质量似乎都与早型星系有关。我们还给出了三阶随机星系偏置参数的第一观测约束。
We present the first direct measurement of the galaxy–matter bispectrum as a function of galaxy luminosity, stellar mass and type of spectral energy distribution (SED). Our analysis uses a galaxy–galaxy–galaxy lensing technique (G3L), on angular scales between 9 arcsec and 50 arcmin, to quantify (i) the excess surface mass density around galaxy pairs (excess mass hereafter) and (ii) the excess shear–shear correlations around single galaxies, both of which yield a measure of two types of galaxy–matter bispectra. We apply our method to the state-of-the-art Canada–France–Hawaii Telescope Lensing Survey (CFHTLenS), spanning 154 square degrees. This survey allows us to detect a significant change of the bispectra with lens properties. Measurements for lens populations with distinct redshift distributions become comparable by a newly devised normalization technique. That will also aid future comparisons to other surveys or simulations. A significant dependence of the normalized G3L statistics on luminosity within −23 ≤Mr≤ −18 and stellar mass within 5 × 109M⊙≤M*≤ 2 × 1011M⊙is found (h= 0.73). Both bispectra exhibit a stronger signal for more luminous lenses or those with higher stellar mass (up to a factor of 2–3). This is accompanied by a steeper equilateral bispectrum for more luminous or higher stellar mass lenses for the excess mass. Importantly, we find the excess mass to be very sensitive to galaxy type as recently predicted with semi-analytic galaxy models: luminous (Mr< −21) late-type galaxies show no detectable signal, while all excess mass detected for luminous galaxies seems to be associated with early-type galaxies. We also present the first observational constraints on third-order stochastic galaxy biasing parameters.
DOI: 10.1086/312068
发表时间: 1998
期刊: The Astrophysical Journal Letters
影响因子: --
作者:
Max Tegmark;B. Bromley
通讯作者: B. Bromley
DOI: 10.1051/0004-6361:20066170
发表时间: 2007-03-01
影响因子: 6.5
作者:
Hartlap, J.;Simon, P.;Schneider, P.
通讯作者: Schneider, P.
DOI: 10.1051/0004-6361/201219358
发表时间: 2012-04
期刊: arXiv: Cosmology and Nongalactic Astrophysics
影响因子: --
作者:
H. Saghiha;S. Hilbert;P. Schneider;P. Simon
通讯作者: H. Saghiha;S. Hilbert;P. Schneider;P. Simon
DOI: 10.1051/0004-6361:20041923
发表时间: 2005-02
影响因子: 6.5
作者:
P. Watts
通讯作者: P. Watts
DOI: 10.1051/0004-6361/201218993
发表时间: 2012-02
影响因子: 6.5
作者:
P. Simon;P. Schneider;D. Kubler
通讯作者: P. Simon;P. Schneider;D. Kubler