CFHTLenS: higher order galaxy–mass correlations probed by galaxy–galaxy–galaxy lensing
CFHTLenS: higher order galaxy–mass correlations probed by galaxy–galaxy–galaxy lensing
复制标题
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
中科院分区:
文献类型:
--
作者:
Simon P;Schneider
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.
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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
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
影响因子:
6.5
作者:
P. Watts
通讯作者:
P. Watts
影响因子:
6.5
作者:
P. Simon;P. Schneider;D. Kubler
通讯作者:
P. Simon;P. Schneider;D. Kubler