Key words: gravitational lensing: weak / galaxies: general Our results are in agreement with previous studies and suggest that lower mass halos are rounder and/or less aligned with their host galaxy than samples of more massive galaxies, studied in galaxy groups and clusters. Restricting our central galaxy ellipticity measurement to the inner isophotes, we find f h = 0.34 ± 0.17 for our red sub-sample, suggesting that the outer galaxy regions are more aligned with their dark matter halos than the inner regions. This purity ensures that the interpretation of our measurements is not complicated by the presence of a significant fraction of satellite galaxies. We quantify the 93.4% purity of our central galaxy sample using numerical simulations and overlapping spectroscopy from the Galaxy and Mass Assembly survey. Using a lens galaxy shape estimation that is more sensitive to outer galaxy regions, we find f h = 0.50 ± 0.20 for our full sample and f h = 0.55 ± 0.19 for an intrinsically red sub-sample (that therefore has a higher stellar mass), rejecting the hypothesis that round halos and/or galaxies are not aligned with their parent halo at 2.5 σ and 2.9 σ, respectively. We present measurements of f h, the ratio of the aligned components of the projected halo and galaxy ellipticities, for a sample of central galaxies using weak gravitational lensing data from the Kilo-Degree Survey (KiDS). University of Chinese Academy of Sciences, Beijing 100049, PR China Shanghai Astronomical Observatory (SHAO), Nandan Road 80, Shanghai 200030, PR China Kapteyn Astronomical Institute, University of Groningen, PO Box 800, 9700 AV Groningen, The Netherlandsĭepartment of Astrophysical Sciences, Princeton University, 4 Ivy Lane, Princeton, NJ 08544, USA Institute for Astronomy, University of Edinburgh, Royal Observatory, Blackford Hill, Edinburgh EH9 3HJ, UK Ruhr University Bochum, Faculty of Physics and Astronomy, Astronomical Institute (AIRUB), German Centre for Cosmological Lensing, 44780 Bochum, GermanyĪrgelander-Institut für Astronomie, Universität Bonn, Auf dem Hügel 71, 53121 Bonn, Germany Leiden Observatory, Leiden University, Niels BohrCA Leiden, The NetherlandsĮ-mail: for Theoretical Physics, Polish Academy of Sciences, Al. de Jong 6, Arun Kannawadi 1 ,7, Peter Schneider 4, Tim Schrabback 4, Huan Yuan Shan 8 ,9 and Angus H. Astronomical objects: linking to databasesĬhristos Georgiou 1, Henk Hoekstra 1, Konrad Kuijken 1, Maciej Bilicki 2, Andrej Dvornik 3, Thomas Erben 4, Benjamin Giblin 5, Catherine Heymans 3 ,5, Hendrik Hildebrandt 3, Jelte T. Including author names using non-Roman alphabets.Suggested resources for more tips on language editing in the sciences Punctuation and style concerns regarding equations, figures, tables, and footnotes
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