KiDS+GAMA: The weak lensing calibrated stellar-to-halo mass relation of central and satellite galaxies

Abstract

We simultaneously present constraints on the stellar-to-halo mass relation for central and satellite galaxies through a weak lensing analysis of spectroscopically classified galaxies. Using overlapping data from the fourth data release of the Kilo-Degree Survey (KiDS), and the Galaxy And Mass Assembly survey (GAMA), we find that satellite galaxies are hosted by halo masses that are $0.53\pm 0.39$ dex (68\% confidence, $3\sigma$ detection) smaller than those of central galaxies of the same stellar mass (for a stellar mass of $\log (M_{\star }/M_{\odot })=10.6$). This is consistent with galaxy formation models, whereby infalling satellite galaxies are preferentially stripped of their dark matter. We find consistent results with similar uncertainties when comparing constraints from a standard azimuthally averaged galaxy-galaxy lensing analysis and a two-dimensional likelihood analysis of the full shear field. As the latter approach is somewhat biased due to the lens incompleteness and as it does not provide any improvement to the precision when applied to actual data, we conclude that stacked tangential shear measurements are best-suited for studies of the galaxy-halo connection.

12 pages, 10 figures, accepted for publication in A&A

References in corpus (13)

• The EAGLE project: Simulating the evolution and assembly of galaxies and their environments
• The fourth data release of the Kilo-Degree Survey: ugri imaging and nine-band optical-IR photometry over 1000 square degrees
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• Density profiles of galaxy groups and clusters from SDSS galaxy-galaxy weak lensing
• An algorithm to build mock galaxy catalogues using MICE simulations
• Dark matter halo properties of GAMA galaxy groups from 100 square degrees of KiDS weak lensing data
• The origin of scatter in the stellar mass - halo mass relation of central galaxies in the EAGLE simulation
• Galaxy And Mass Assembly (GAMA): The galaxy stellar mass function to $z=0.1$ from the r-band selected equatorial regions
• Truncation of galaxy dark matter halos in high density environments
• Separating intrinsic alignment and galaxy-galaxy lensing
• Measuring the growth of matter fluctuations with third-order galaxy correlations
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• The case for two-dimensional galaxy-galaxy lensing

Cited by in corpus (11)

• The Outer Stellar Mass of Massive Galaxies: A Simple Tracer of Halo Mass with Scatter Comparable to Richness and Reduced Projection Effects
• The galaxy-halo connection of disc galaxies over six orders of magnitude in stellar mass
• The Subaru HSC weak lensing mass-observable scaling relations of spectroscopic galaxy groups from the GAMA survey
• Assessing Mass Loss and Stellar-to-Halo Mass Ratio of Satellite Galaxies: A Galaxy-Galaxy Lensing Approach Utilizing DECaLS DR8 Data
• Shape noise and dispersion in precision weak lensing
• The history and mass content of cluster galaxies in the EAGLE simulation
• Galaxy-galaxy lensing in the VOICE deep survey
• Shedding light on the star formation rate-halo accretion rate connection and halo quenching mechanism via DECODE, the Discrete statistical sEmi-empiriCal mODEl
• Splashback radius and the mass accretion rate of RASS MCMF galaxy clusters
• A Salpeter IMF and an NFW halo: Disentangling the dark and stellar mass of an elliptical galaxy through precise lens modelling of a double-source-plane system
• Testing the key role of the stellar mass-halo mass relation in galaxy merger rates and morphologies via DECODE, a novel Discrete statistical sEmi-empiriCal mODEl