%0 Journal Article %1 Schrabback2015CFHTLenS %A Schrabback, Tim %A Hilbert, Stefan %A Hoekstra, Henk %A Simon, Patrick %A van Uitert, Edo %A Erben, Thomas %A Heymans, Catherine %A Hildebrandt, Hendrik %A Kitching, Thomas D. %A Mellier, Yannick %A Miller, Lance %A Van Waerbeke, Ludovic %A Bett, Philip %A Coupon, Jean %A Fu, Liping %A Hudson, Michael J. %A Joachimi, Benjamin %A Kilbinger, Martin %A Kuijken, Konrad %D 2015 %J Monthly Notices of the Royal Astronomical Society %K misalignments colleagues astro myown %N 2 %P 1432--1452 %R 10.1093/mnras/stv2053 %T CFHTLenS: Weak lensing constraints on the ellipticity of galaxy-scale matter haloes and the galaxy-halo misalignment %U http://dx.doi.org/10.1093/mnras/stv2053 %V 454 %X We present weak lensing constraints on the ellipticity of galaxy-scale matter haloes and the galaxy-halo misalignment. Using data from the Canada-France-Hawaii Telescope Lensing Survey (CFHTLenS), we measure the weighted-average ratio of the aligned projected ellipticity components of galaxy matter haloes and their embedded galaxies, \$f\_h\$, split by galaxy type. We then compare our observations to measurements taken from the Millennium Simulation, assuming different models of galaxy-halo misalignment. Using the Millennium Simulation we verify that the statistical estimator used removes contamination from cosmic shear. We also detect an additional signal in the simulation, which we interpret as the impact of intrinsic shape-shear alignments between the lenses and their large-scale structure environment. These alignments are likely to have caused some of the previous observational constraints on \$f\_h\$ to be biased high. From CFHTLenS we find \$f\_h=-0.04 0.25\$ for early-type galaxies, which is consistent with current models for the galaxy-halo misalignment predicting \$f\_h\simeq 0.20\$. For late-type galaxies we measure \$f\_h=0.69\_-0.36^+0.37\$ from CFHTLenS. This can be compared to the simulated results which yield \$f\_h0.02\$ for misaligned late-type models.

@article{Schrabback2015CFHTLenS, abstract = {We present weak lensing constraints on the ellipticity of galaxy-scale matter haloes and the galaxy-halo misalignment. Using data from the Canada-France-Hawaii Telescope Lensing Survey (CFHTLenS), we measure the weighted-average ratio of the aligned projected ellipticity components of galaxy matter haloes and their embedded galaxies, \$f\_\mathrm{h}\$, split by galaxy type. We then compare our observations to measurements taken from the Millennium Simulation, assuming different models of galaxy-halo misalignment. Using the Millennium Simulation we verify that the statistical estimator used removes contamination from cosmic shear. We also detect an additional signal in the simulation, which we interpret as the impact of intrinsic shape-shear alignments between the lenses and their large-scale structure environment. These alignments are likely to have caused some of the previous observational constraints on \$f\_\mathrm{h}\$ to be biased high. From CFHTLenS we find \$f\_\mathrm{h}=-0.04 \pm 0.25\$ for early-type galaxies, which is consistent with current models for the galaxy-halo misalignment predicting \$f\_\mathrm{h}\simeq 0.20\$. For late-type galaxies we measure \$f\_\mathrm{h}=0.69\_{-0.36}^{+0.37}\$ from CFHTLenS. This can be compared to the simulated results which yield \$f\_\mathrm{h}\simeq 0.02\$ for misaligned late-type models.}, added-at = {2018-06-18T21:23:34.000+0200}, archiveprefix = {arXiv}, author = {Schrabback, Tim and Hilbert, Stefan and Hoekstra, Henk and Simon, Patrick and van Uitert, Edo and Erben, Thomas and Heymans, Catherine and Hildebrandt, Hendrik and Kitching, Thomas D. and Mellier, Yannick and Miller, Lance and Van Waerbeke, Ludovic and Bett, Philip and Coupon, Jean and Fu, Liping and Hudson, Michael J. and Joachimi, Benjamin and Kilbinger, Martin and Kuijken, Konrad}, biburl = {https://www.bibsonomy.org/bibtex/2b092c773c603c3873584d5b97929f06f/pbett}, citeulike-article-id = {13674379}, citeulike-linkout-0 = {http://arxiv.org/abs/1507.04301}, citeulike-linkout-1 = {http://arxiv.org/pdf/1507.04301}, citeulike-linkout-2 = {http://dx.doi.org/10.1093/mnras/stv2053}, day = 20, doi = {10.1093/mnras/stv2053}, eprint = {1507.04301}, interhash = {ebe9d6c3056503919941fe701be8fa6a}, intrahash = {b092c773c603c3873584d5b97929f06f}, issn = {0035-8711}, journal = {Monthly Notices of the Royal Astronomical Society}, keywords = {misalignments colleagues astro myown}, month = oct, number = 2, pages = {1432--1452}, posted-at = {2015-07-16 11:05:28}, priority = {2}, timestamp = {2018-10-01T09:50:26.000+0200}, title = {CFHTLenS: Weak lensing constraints on the ellipticity of galaxy-scale matter haloes and the galaxy-halo misalignment}, url = {http://dx.doi.org/10.1093/mnras/stv2053}, volume = 454, year = 2015 }