KiDS-DR5: Exploring dust transport in dark matter halos of galaxies
Abstract
We analyse a well-defined sample of galaxies from the final data release of the Kilo-Degree Survey (KiDS-DR5), selected using magnitude, photometric redshift, and stellar mass cuts, to measure their mean halo mass and circumgalactic dust content as a function of stellar mass. Our goal is to provide empirical constraints on dust transport mechanisms, such as stellar- and AGN-driven outflows, operating in galaxy halos. We develop and validate a new measurement and modelling framework using the MICE2 simulation, incorporating a realistic circumgalactic dust extinction scenario. Using this framework, we jointly model multiband (ugriZYJHKs) magnitude shifts and galaxy--galaxy lensing signals to infer the mean halo mass and dust mass of lens galaxies at zB < 0.4, analysed in five stellar-mass bins in KiDS-DR5. The modelling jointly describes the halo mass distribution and dust extinction, including dust associated with neighbouring halos. We demonstrate that the inclusion of a satellite fraction and dust extinction from neighbouring halos is required by the data. We find a linear relation between stellar mass and dust mass, consistent with previous observational studies, but flatter than predictions from the semi-analytic model \textsc{Dusty-SAGE}. This difference may indicate that current implementations of dust-related feedback in galaxy formation models require further refinement.
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BibTeX
@misc{genc2026kidsdr5,
title = {{KiDS-DR5: Exploring dust transport in dark matter halos of galaxies}},
author = {Eray Genc and Angus H. Wright and Hendrik Hildebrandt and Dian P. Triani and Dominik J. Bomans and Benjamin Stölzner and Marika Asgari and Henk Hoekstra and Benjamin Joachimi and Shahab Joudaki and Konrad Kuijken and Lauro Moscardini and Mario Radovich and Robert Reischke and Ziang Yan},
howpublished = {arXiv},
year = {2026},
month = sep,
doi = {10.48550/arxiv.2609.34615},
eprint = {2609.34615},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2609.34615},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - KiDS-DR5: Exploring dust transport in dark matter halos of galaxies
AU - Eray Genc
AU - Angus H. Wright
AU - Hendrik Hildebrandt
AU - Dian P. Triani
AU - Dominik J. Bomans
AU - Benjamin Stölzner
AU - Marika Asgari
AU - Henk Hoekstra
AU - Benjamin Joachimi
AU - Shahab Joudaki
AU - Konrad Kuijken
AU - Lauro Moscardini
AU - Mario Radovich
AU - Robert Reischke
AU - Ziang Yan
PY - 2026
DA - 2026/09/28
PB - arXiv
DO - 10.48550/arxiv.2609.34615
UR - https://arxiv.org/abs/2609.34615
AB - We analyse a well-defined sample of galaxies from the final data release of the Kilo-Degree Survey (KiDS-DR5), selected using magnitude, photometric redshift, and stellar mass cuts, to measure their mean halo mass and circumgalactic dust content as a function of stellar mass. Our goal is to provide empirical constraints on dust transport mechanisms, such as stellar- and AGN-driven outflows, operating in galaxy halos. We develop and validate a new measurement and modelling framework using the MICE2 simulation, incorporating a realistic circumgalactic dust extinction scenario. Using this framework, we jointly model multiband (ugriZYJHK_s) magnitude shifts and galaxy--galaxy lensing signals to infer the mean halo mass and dust mass of lens galaxies at z_B < 0.4, analysed in five stellar-mass bins in KiDS-DR5. The modelling jointly describes the halo mass distribution and dust extinction, including dust associated with neighbouring halos. We demonstrate that the inclusion of a satellite fraction and dust extinction from neighbouring halos is required by the data. We find a linear relation between stellar mass and dust mass, consistent with previous observational studies, but flatter than predictions from the semi-analytic model \textsc{Dusty-SAGE}. This difference may indicate that current implementations of dust-related feedback in galaxy formation models require further refinement.
ER -