The masses of satellites in GAMA galaxy groups from 100 square degrees of KiDS weak lensing data

Cristóbal Sifón; Marcello Cacciato; Henk Hoekstra; Margot Brouwer; Edo van Uitert; Massimo Viola; Ivan Baldry; Sarah Brough; Michael J. I. Brown; Ami Choi; Simon P. Driver; Thomas Erben; Aniello Grado; Catherine Heymans; Hendrik Hildebrandt; Benjamin Joachimi; Jelte T. A. de Jong; Konrad Kuijken; John McFarland; Lance Miller; Reiko Nakajima; Nicola Napolitano; Peder Norberg; Aaron S. G. Robotham; Peter Schneider; Gijs Verdoes Kleijn

doi:10.1093/mnras/stv2051

The masses of satellites in GAMA galaxy groups from 100 square degrees of KiDS weak lensing data

Cristóbal Sifón, Marcello Cacciato, Henk Hoekstra, Margot Brouwer, Edo van Uitert, Massimo Viola, Ivan Baldry, Sarah Brough, Michael J. I. Brown, Ami Choi, Simon P. Driver, Thomas Erben, Aniello Grado, Catherine Heymans, Hendrik Hildebrandt, Benjamin Joachimi, Jelte T. A. de Jong, Konrad Kuijken, John McFarland, Lance MillerReiko Nakajima, Nicola Napolitano, Peder Norberg, Aaron S. G. Robotham, Peter Schneider, Gijs Verdoes Kleijn

School of Physics and Astronomy

Research output: Contribution to journal › Article › peer-review

Abstract

We use the first 100 deg² of overlap between the Kilo-Degree Survey and the Galaxy And Mass Assembly survey to determine the average galaxy halo mass of ∼10 000 spectroscopically confirmed satellite galaxies in massive (M > 10¹³ h⁻¹ M⊙) galaxy groups. Separating the sample as a function of projected
distance to the group centre, we jointly model the satellites and their host groups with Navarro–Frenk–White density profiles, fully accounting for the data covariance. The probed satellite galaxies in these groups have total masses log 〈M_sub/(_h−1 M⊙)〉 ≈ 11.7–12.2 consistent across group-centric distance within the errorbars. Given their typical stellar masses, log 〈M⋆, _sat/(h⁻² M⊙)〉 ∼ 10.5, such total masses imply stellar mass fractions of 〈M⋆, _sat〉/〈M_sub〉 ≈ 0.04 ^h−1. The average subhalo hosting these satellite galaxies has a mass M_sub ∼ 0.015M_host independent of host halo mass, in broad agreement with the expectations of structure formation in a Λ cold dark matter universe.

Original language	English
Pages (from-to)	3938-3951
Journal	Monthly Notices of the Royal Astronomical Society
Volume	454
Issue number	4
Early online date	21 Dec 2015
DOIs	https://doi.org/10.1093/mnras/stv2051
Publication status	Published - 21 Dec 2015

Keywords

Gravitational lensing: weak
Methods: observational
Methods: statistical
Galaxies: haloes
Galaxies: statistics
Dark matter

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10.1093/mnras/stv2051

Sifon-2015-GAMA-MNRAS-3938
© 2015,the Author(s). This work has been made available online in accordance with the publisher’s policies. This is the final published version of the work, which was originally published at https://doi.org/10.1093/mnras/stv2051
Final published version, 928 KB

GAMA Data Release 2
Liske, J. (Creator), Baldry, I. K. (Creator), Driver, S. P. (Creator), Tuffs, R. J. (Creator), Alpaslan, M. (Creator), Andrae, E. (Creator), Brough, S. (Creator), Cluver, M. E. (Creator), Grootes, M. W. (Creator), Gunawardhana, M. L. P. (Creator), Kelvin, L. S. (Creator), Loveday, J. (Creator), Robotham, A. S. G. (Creator), Bamford, S. P. (Creator), Bland-Hawthorn, J. (Creator), Brown, M. J. I. (Creator), Drinkwater, M. J. (Creator), Hopkins, A. M. (Creator), Meyer, M. J. (Creator), Norberg, P. (Creator), Peacock, J. A. (Creator), Agius, N. K. (Creator), Andrews, S. K. (Creator), Bauer, A. E. (Creator), Ching, J. H. Y. (Creator), Colles, M. (Creator), Conselice, C. J. (Creator), Croom, S. M. (Creator), Davies, L. J. M. (Creator), De Propris, R. (Creator), Dunne, L. (Creator), Eardley, E. M. (Creator), Ellis, S. (Creator), Foster, C. (Creator), Frenk, C. S. (Creator), Haußler, B. (Creator), Holwerda, B. W. (Creator), Howlett, C. (Creator), Ibarra, H. (Creator), Jarvis, M. J. (Creator), Jones, D. H. (Creator), Kafle, P. R. (Creator), Lacey, C. G. (Creator), Lange, R. (Creator), Lara-Ĺopez, M. A. (Creator), López-Sánchez, Á. R. (Creator), Maddox, S. (Creator), Madore, B. F. (Creator), McNaught-Roberts, T. (Creator), Moffett, A. J. (Creator), Nichol, R. C. (Creator), Owers, M. S. (Creator), Palamara, D. (Creator), Penny, S. J. (Creator), Phillipps, S. (Creator), Pimbblet, K. A. (Creator), Popescu, C. C. (Creator), Prescott, M. (Creator), Proctor, R. (Creator), Sadler, E. M. (Creator), Sansom, A. E. (Creator), Seibert, M. (Creator), Sharp, R. (Creator), Sutherland, W. (Creator), Vazquez-Mata, J. A. (Creator), van Kampen, E. (Creator), Wilkins, S. M. (Creator), Williams, R. (Creator) & Wright, A. H. (Creator), Galaxy And Mass Assembly (GAMA), 11 Sept 2015
http://www.gama-survey.org/dr2/
Dataset

Cite this

Sifón, C., Cacciato, M., Hoekstra, H., Brouwer, M., Uitert, E. V., Viola, M., Baldry, I., Brough, S., Brown, M. J. I., Choi, A., Driver, S. P., Erben, T., Grado, A., Heymans, C., Hildebrandt, H., Joachimi, B., Jong, J. T. A. D., Kuijken, K., McFarland, J., ... Kleijn, G. V. (2015). The masses of satellites in GAMA galaxy groups from 100 square degrees of KiDS weak lensing data. Monthly Notices of the Royal Astronomical Society, 454(4), 3938-3951. https://doi.org/10.1093/mnras/stv2051

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title = "The masses of satellites in GAMA galaxy groups from 100 square degrees of KiDS weak lensing data",

abstract = "We use the first 100 deg2 of overlap between the Kilo-Degree Survey and the Galaxy And Mass Assembly survey to determine the average galaxy halo mass of ∼10 000 spectroscopically confirmed satellite galaxies in massive (M > 1013 h−1 M⊙) galaxy groups. Separating the sample as a function of projected distance to the group centre, we jointly model the satellites and their host groups with Navarro–Frenk–White density profiles, fully accounting for the data covariance. The probed satellite galaxies in these groups have total masses log 〈Msub/(h−1 M⊙)〉 ≈ 11.7–12.2 consistent across group-centric distance within the errorbars. Given their typical stellar masses, log 〈M⋆, sat/(h−2 M⊙)〉 ∼ 10.5, such total masses imply stellar mass fractions of 〈M⋆, sat〉/〈Msub〉 ≈ 0.04 h−1. The average subhalo hosting these satellite galaxies has a mass Msub ∼ 0.015Mhost independent of host halo mass, in broad agreement with the expectations of structure formation in a Λ cold dark matter universe.",

keywords = "Gravitational lensing: weak, Methods: observational, Methods: statistical, Galaxies: haloes, Galaxies: statistics, Dark matter",

author = "Crist{\'o}bal Sif{\'o}n and Marcello Cacciato and Henk Hoekstra and Margot Brouwer and Uitert, {Edo van} and Massimo Viola and Ivan Baldry and Sarah Brough and Brown, {Michael J. I.} and Ami Choi and Driver, {Simon P.} and Thomas Erben and Aniello Grado and Catherine Heymans and Hendrik Hildebrandt and Benjamin Joachimi and Jong, {Jelte T. A. de} and Konrad Kuijken and John McFarland and Lance Miller and Reiko Nakajima and Nicola Napolitano and Peder Norberg and Robotham, {Aaron S. G.} and Peter Schneider and Kleijn, {Gijs Verdoes}",

year = "2015",

month = dec,

day = "21",

doi = "10.1093/mnras/stv2051",

language = "English",

volume = "454",

pages = "3938--3951",

journal = "Monthly Notices of the Royal Astronomical Society",

issn = "0035-8711",

publisher = "Oxford University Press",

number = "4",

}

Sifón, C, Cacciato, M, Hoekstra, H, Brouwer, M, Uitert, EV, Viola, M, Baldry, I, Brough, S, Brown, MJI, Choi, A, Driver, SP, Erben, T, Grado, A, Heymans, C, Hildebrandt, H, Joachimi, B, Jong, JTAD, Kuijken, K, McFarland, J, Miller, L, Nakajima, R, Napolitano, N, Norberg, P, Robotham, ASG, Schneider, P & Kleijn, GV 2015, 'The masses of satellites in GAMA galaxy groups from 100 square degrees of KiDS weak lensing data', Monthly Notices of the Royal Astronomical Society, vol. 454, no. 4, pp. 3938-3951. https://doi.org/10.1093/mnras/stv2051

TY - JOUR

T1 - The masses of satellites in GAMA galaxy groups from 100 square degrees of KiDS weak lensing data

AU - Sifón, Cristóbal

AU - Cacciato, Marcello

AU - Hoekstra, Henk

AU - Brouwer, Margot

AU - Uitert, Edo van

AU - Viola, Massimo

AU - Baldry, Ivan

AU - Brough, Sarah

AU - Brown, Michael J. I.

AU - Choi, Ami

AU - Driver, Simon P.

AU - Erben, Thomas

AU - Grado, Aniello

AU - Heymans, Catherine

AU - Hildebrandt, Hendrik

AU - Joachimi, Benjamin

AU - Jong, Jelte T. A. de

AU - Kuijken, Konrad

AU - McFarland, John

AU - Miller, Lance

AU - Nakajima, Reiko

AU - Napolitano, Nicola

AU - Norberg, Peder

AU - Robotham, Aaron S. G.

AU - Schneider, Peter

AU - Kleijn, Gijs Verdoes

PY - 2015/12/21

Y1 - 2015/12/21

N2 - We use the first 100 deg2 of overlap between the Kilo-Degree Survey and the Galaxy And Mass Assembly survey to determine the average galaxy halo mass of ∼10 000 spectroscopically confirmed satellite galaxies in massive (M > 1013 h−1 M⊙) galaxy groups. Separating the sample as a function of projected distance to the group centre, we jointly model the satellites and their host groups with Navarro–Frenk–White density profiles, fully accounting for the data covariance. The probed satellite galaxies in these groups have total masses log 〈Msub/(h−1 M⊙)〉 ≈ 11.7–12.2 consistent across group-centric distance within the errorbars. Given their typical stellar masses, log 〈M⋆, sat/(h−2 M⊙)〉 ∼ 10.5, such total masses imply stellar mass fractions of 〈M⋆, sat〉/〈Msub〉 ≈ 0.04 h−1. The average subhalo hosting these satellite galaxies has a mass Msub ∼ 0.015Mhost independent of host halo mass, in broad agreement with the expectations of structure formation in a Λ cold dark matter universe.

AB - We use the first 100 deg2 of overlap between the Kilo-Degree Survey and the Galaxy And Mass Assembly survey to determine the average galaxy halo mass of ∼10 000 spectroscopically confirmed satellite galaxies in massive (M > 1013 h−1 M⊙) galaxy groups. Separating the sample as a function of projected distance to the group centre, we jointly model the satellites and their host groups with Navarro–Frenk–White density profiles, fully accounting for the data covariance. The probed satellite galaxies in these groups have total masses log 〈Msub/(h−1 M⊙)〉 ≈ 11.7–12.2 consistent across group-centric distance within the errorbars. Given their typical stellar masses, log 〈M⋆, sat/(h−2 M⊙)〉 ∼ 10.5, such total masses imply stellar mass fractions of 〈M⋆, sat〉/〈Msub〉 ≈ 0.04 h−1. The average subhalo hosting these satellite galaxies has a mass Msub ∼ 0.015Mhost independent of host halo mass, in broad agreement with the expectations of structure formation in a Λ cold dark matter universe.

KW - Gravitational lensing: weak

KW - Methods: observational

KW - Methods: statistical

KW - Galaxies: haloes

KW - Galaxies: statistics

KW - Dark matter

U2 - 10.1093/mnras/stv2051

DO - 10.1093/mnras/stv2051

M3 - Article

SN - 0035-8711

VL - 454

SP - 3938

EP - 3951

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

IS - 4

ER -

The masses of satellites in GAMA galaxy groups from 100 square degrees of KiDS weak lensing data

Abstract

Keywords

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Datasets

GAMA Data Release 2

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