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

C. Sifón; M. Cacciato; H. Hoekstra; M. Brouwer; E.v. Uitert; M. Viola; I. Baldry; S. Brough; M.J.I. Brown; A. Choi; Simon Driver; T. Erben; A. Grado; C. Heymans; H. Hildebrandt; B. Joachimi; J.T.A. De Jong; K. Kuijken; J. Mcfarland; L. Miller; R. Nakajima; N. Napolitano; P. Norberg; Aaron Robotham; P. Schneider; G.V. Kleijn

doi:10.1093/mnras/stv2051

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

C. Sifón, M. Cacciato, H. Hoekstra, M. Brouwer, E.v. Uitert, M. Viola, I. Baldry, S. Brough, M.J.I. Brown, A. Choi, Simon Driver, T. Erben, A. Grado, C. Heymans, H. Hildebrandt, B. Joachimi, J.T.A. De Jong, K. Kuijken, J. Mcfarland, L. MillerR. Nakajima, N. Napolitano, P. Norberg, Aaron Robotham, P. Schneider, G.V. Kleijn

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41 Citations (Scopus)

Abstract

© 2015 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. We use the first 100 deg2 of overlap between the Kilo-Degree Survey and the Galaxy AndMass Assembly survey to determine the average galaxy halomass 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 ~ 0.015 Mhost 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
DOIs	https://doi.org/10.1093/mnras/stv2051
Publication status	Published - 2015

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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., Erben, T., Grado, A., Heymans, C., Hildebrandt, H., Joachimi, B., De Jong, J. T. A., 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

Sifón, C. ; Cacciato, M. ; Hoekstra, H. ; Brouwer, M. ; Uitert, E.v. ; Viola, M. ; Baldry, I. ; Brough, S. ; Brown, M.J.I. ; Choi, A. ; Driver, Simon ; Erben, T. ; Grado, A. ; Heymans, C. ; Hildebrandt, H. ; Joachimi, B. ; De Jong, J.T.A. ; Kuijken, K. ; Mcfarland, J. ; Miller, L. ; Nakajima, R. ; Napolitano, N. ; Norberg, P. ; Robotham, Aaron ; Schneider, P. ; Kleijn, G.V. / The masses of satellites in GAMA galaxy groups from 100 square degrees of KiDS weak lensing data. In: Monthly Notices of the Royal Astronomical Society. 2015 ; Vol. 454, No. 4. pp. 3938-3951.

@article{a2ccae18794341c38b752277c627391f,

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

abstract = "{\textcopyright} 2015 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. We use the first 100 deg2 of overlap between the Kilo-Degree Survey and the Galaxy AndMass Assembly survey to determine the average galaxy halomass 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 ~ 0.015 Mhost independent of host halo mass, in broad agreement with the expectations of structure formation in a Λ cold dark matter universe.",

author = "C. Sif{\'o}n and M. Cacciato and H. Hoekstra and M. Brouwer and E.v. Uitert and M. Viola and I. Baldry and S. Brough and M.J.I. Brown and A. Choi and Simon Driver and T. Erben and A. Grado and C. Heymans and H. Hildebrandt and B. Joachimi and {De Jong}, J.T.A. and K. Kuijken and J. Mcfarland and L. Miller and R. Nakajima and N. Napolitano and P. Norberg and Aaron Robotham and P. Schneider and G.V. Kleijn",

year = "2015",

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, S, Erben, T, Grado, A, Heymans, C, Hildebrandt, H, Joachimi, B, De Jong, JTA, Kuijken, K, Mcfarland, J, Miller, L, Nakajima, R, Napolitano, N, Norberg, P, Robotham, A, 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

The masses of satellites in GAMA galaxy groups from 100 square degrees of KiDS weak lensing data. / Sifón, C.; Cacciato, M.; Hoekstra, H.; Brouwer, M.; Uitert, E.v.; Viola, M.; Baldry, I.; Brough, S.; Brown, M.J.I.; Choi, A.; Driver, Simon; Erben, T.; Grado, A.; Heymans, C.; Hildebrandt, H.; Joachimi, B.; De Jong, J.T.A.; Kuijken, K.; Mcfarland, J.; Miller, L.; Nakajima, R.; Napolitano, N.; Norberg, P.; Robotham, Aaron; Schneider, P.; Kleijn, G.V.

In: Monthly Notices of the Royal Astronomical Society, Vol. 454, No. 4, 2015, p. 3938-3951.

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

TY - JOUR

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

AU - Sifón, C.

AU - Cacciato, M.

AU - Hoekstra, H.

AU - Brouwer, M.

AU - Uitert, E.v.

AU - Viola, M.

AU - Baldry, I.

AU - Brough, S.

AU - Brown, M.J.I.

AU - Choi, A.

AU - Driver, Simon

AU - Erben, T.

AU - Grado, A.

AU - Heymans, C.

AU - Hildebrandt, H.

AU - Joachimi, B.

AU - De Jong, J.T.A.

AU - Kuijken, K.

AU - Mcfarland, J.

AU - Miller, L.

AU - Nakajima, R.

AU - Napolitano, N.

AU - Norberg, P.

AU - Robotham, Aaron

AU - Schneider, P.

AU - Kleijn, G.V.

PY - 2015

Y1 - 2015

N2 - © 2015 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. We use the first 100 deg2 of overlap between the Kilo-Degree Survey and the Galaxy AndMass Assembly survey to determine the average galaxy halomass 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 ~ 0.015 Mhost independent of host halo mass, in broad agreement with the expectations of structure formation in a Λ cold dark matter universe.

AB - © 2015 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. We use the first 100 deg2 of overlap between the Kilo-Degree Survey and the Galaxy AndMass Assembly survey to determine the average galaxy halomass 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 ~ 0.015 Mhost independent of host halo mass, in broad agreement with the expectations of structure formation in a Λ cold dark matter universe.

U2 - 10.1093/mnras/stv2051

DO - 10.1093/mnras/stv2051

M3 - Article

VL - 454

SP - 3938

EP - 3951

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

SN - 0035-8711

IS - 4

ER -

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

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