Multiwavelength scaling relations in galaxy groups: a detailed comparison of GAMA and KiDS observations to BAHAMAS simulations

Jakobs, Arthur; Viola, Massimo; McCarthy, Ian G.; Waerbeke, Ludovic Van; Hoekstra, Henk; Robotham, Aaron S. G.; Hinshaw, G.; Hojjati, Alireza; Tanimura, Hidehiko; Tröster, Tilman; Baldry, I. K.; Heymans, Catherine; Hildebrandt, Hendrik; Kuijken, Konrad; Norberg, Peder; Schaye, Joop; Sifón, Cristobál; Uitert, Edo van; Valentijn, E. A.; Kleijn, Gijs Verdoes; Wang, Lingyu

doi:10.1093/mnras/sty2017

Cited by 14 publications

(8 citation statements)

References 70 publications

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“…Both simulations reproduce the observed SHMR in an overall sense, as shown in Fig. 6 of McCarthy et al (2017) and Jakobs et al (2018) for BAHAMAS, and guaranteed by construction as described in Carretero et al (2015) for MICE. However, while in MICE our isolated galaxy sample follows essentially the same SHMR as the parent sample, in BAHAMAS isolated galaxies have, on average, triple the stellar mass at fixed halo mass compared to the global BAHAMAS galaxy population.…”

Section: The Rar Of Kids Compared To λCdm Simulationssupporting

confidence: 63%

The weak lensing radial acceleration relation: Constraining modified gravity and cold dark matter theories with KiDS-1000

Brouwer

Oman²,

Valentijn³

et al. 2021

A&A

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130

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We present measurements of the radial gravitational acceleration around isolated galaxies, comparing the expected gravitational acceleration given the baryonic matter (gbar) with the observed gravitational acceleration (gobs), using weak lensing measurements from the fourth data release of the Kilo-Degree Survey (KiDS-1000). These measurements extend the radial acceleration relation (RAR), traditionally measured using galaxy rotation curves, by 2 decades in gobs into the low-acceleration regime beyond the outskirts of the observable galaxy. We compare our RAR measurements to the predictions of two modified gravity (MG) theories: modified Newtonian dynamics and Verlinde’s emergent gravity (EG). We find that the measured relation between gobs and gbar agrees well with the MG predictions. In addition, we find a difference of at least 6σ between the RARs of early- and late-type galaxies (split by Sérsic index and u − r colour) with the same stellar mass. Current MG theories involve a gravity modification that is independent of other galaxy properties, which would be unable to explain this behaviour, although the EG theory is still limited to spherically symmetric static mass models. The difference might be explained if only the early-type galaxies have significant (Mgas ≈ M⋆) circumgalactic gaseous haloes. The observed behaviour is also expected in Λ-cold dark matter (ΛCDM) models where the galaxy-to-halo mass relation depends on the galaxy formation history. We find that MICE, a ΛCDM simulation with hybrid halo occupation distribution modelling and abundance matching, reproduces the observed RAR but significantly differs from BAHAMAS, a hydrodynamical cosmological galaxy formation simulation. Our results are sensitive to the amount of circumgalactic gas; current observational constraints indicate that the resulting corrections are likely moderate. Measurements of the lensing RAR with future cosmological surveys (such as Euclid) will be able to further distinguish between MG and ΛCDM models if systematic uncertainties in the baryonic mass distribution around galaxies are reduced.

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Section: The Rar Of Kids Compared To λCdm Simulationssupporting

confidence: 63%

The weak lensing radial acceleration relation: Constraining modified gravity and cold dark matter theories with KiDS-1000

Brouwer

Oman²,

Valentijn³

et al. 2021

A&A

Self Cite

130

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“…This is a likely consequence of the observed problem with the FoF algorithm used to identify galaxy groups in the GAMA survey, but it does not seem to substantially affect the results. The FoF algorithm separates groups into a number of smaller groups or smaller, aggregate, unrelated groups into one large group, which would then host more than one central galaxy with them being classified as a satellite (Jakobs et al 2018). In order to assess the possible bias due to missing galaxies in a magnitude limited survey, such as GAMA, we use the MICE-GC N-body simulation from which the MICE collaboration constructed a lightcone spanning a full octant on the sky (Fosalba et al 2015a,b).…”

Section: Assessment Of Completeness Bias In 2d Galaxy-galaxy Lensingmentioning

confidence: 99%

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

Dvornik

Hoekstra

Kuijken

et al. 2020

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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 ± 0.39 dex (68% confidence, 3σ detection) smaller than those of central galaxies of the same stellar mass (for a stellar mass of log(M⋆/M⊙) = 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.

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“…Though designed for the primary cosmology science case ([KiDS450]; Joudaki et al 2017;van Uitert et al 2018;Köhlinger et al 2017;Harnois-Déraps et al 2017;Amon et al 2018;Shan et al 2018;Martinet et al 2018;Giblin et al 2018;Asgari et al 2018), KiDS data are also being used for a variety of other studies, including the galaxy-halo connection (van Uitert et al 2016(van Uitert et al , 2017, searches for strongly lensed galaxies (Petrillo et al 2019) and quasars (Spiniello et al 2018;Sergeyev et al 2018), solar system objects (Mahlke et al 2018), photometric redshift machine learning method development (Amaro et al 2019;Bilicki et al 2018), studies of galaxy evolution (Tortora et al 2018a,b;Roy et al 2018), bias (Dvornik et al 2018), environment (Brouwer et al 2016Costa-Duarte et al 2018) and morphology (Kelvin et al 2018), galaxy group properties (Viola et al 2015;Jakobs et al 2018), galaxy cluster searches (Maturi et al 2019;Bellagamba et al 2019), intrinsic alignment of galaxies (Georgiou et al 2019;Johnston et al 2018), satellite halo masses (Sifón et al 2015), and searches for luminous red galaxies (Vakili et al 2018) and quasars (Nakoneczny et al 2018).…”

Section: Introduction: the Kilo-degree And Viking Surveysmentioning

confidence: 99%

The fourth data release of the Kilo-Degree Survey:ugriimaging and nine-band optical-IR photometry over 1000 square degrees

Kuijken

Heymans

Dvornik

et al. 2019

A&A

327

335

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Context. The Kilo-Degree Survey (KiDS) is an ongoing optical wide-field imaging survey with the OmegaCAM camera at the VLT Survey Telescope, specifically designed for measuring weak gravitational lensing by galaxies and large-scale structure. When completed it will consist of 1350 square degrees imaged in four filters (ugri). Aims. Here we present the fourth public data release which more than doubles the area of sky covered by data release 3. We also include aperture-matched ZYJHK s photometry from our partner VIKING survey on the VISTA telescope in the photometry catalogue. We illustrate the data quality and describe the catalogue content. Methods. Two dedicated pipelines are used for the production of the optical data. The Astro-WISE information system is used for the production of co-added images in the four survey bands, while a separate reduction of the r-band images using the theli pipeline is used to provide a source catalogue suitable for the core weak lensing science case. All data have been re-reduced for this data release using the latest versions of the pipelines. The VIKING photometry is obtained as forced photometry on the theli sources, using a re-reduction of the VIKING data that starts from the VISTA pawprints. Modifications to the pipelines with respect to earlier releases are described in detail. The photometry is calibrated to the Gaia DR2 G band using stellar locus regression. Results. In this data release a total of 1006 square-degree survey tiles with stacked ugri images are made available, accompanied by weight maps, masks, and single-band source lists. We also provide a multi-band catalogue based on r-band detections, including homogenized photometry and photometric redshifts, for the whole dataset. Mean limiting magnitudes (5σ in a 2 aperture) and the tile-to-tile rms scatter are 24.23 ± 0.12, 25.12 ± 0.14, 25.02 ± 0.13, 23.68 ± 0.27 in ugri, respectively, and the mean r-band seeing is 0 . 70.

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Multiwavelength scaling relations in galaxy groups: a detailed comparison of GAMA and KiDS observations to BAHAMAS simulations

Cited by 14 publications

References 70 publications

The weak lensing radial acceleration relation: Constraining modified gravity and cold dark matter theories with KiDS-1000

The weak lensing radial acceleration relation: Constraining modified gravity and cold dark matter theories with KiDS-1000

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

The fourth data release of the Kilo-Degree Survey:ugriimaging and nine-band optical-IR photometry over 1000 square degrees

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