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

Andrej Dvornik; Henk Hoekstra; Konrad Kuijken; Angus H. Wright; Marika Asgari; Maciej Bilicki; Thomas Erben; Benjamin Giblin; Alister W. Graham; Catherine Heymans; Hendrik Hildebrandt; Andrew M. Hopkins; Arun Kannawadi; Chieh An Lin; Edward N. Taylor; Tilman Tröster

doi:10.1051/0004-6361/202038693

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

Andrej Dvornik^*, Henk Hoekstra, Konrad Kuijken, Angus H. Wright, Marika Asgari, Maciej Bilicki, Thomas Erben, Benjamin Giblin, Alister W. Graham, Catherine Heymans, Hendrik Hildebrandt, Andrew M. Hopkins, Arun Kannawadi, Chieh An Lin, Edward N. Taylor, Tilman Tröster

^*Corresponding author for this work

Australian Astronomical Optics

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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 ± 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.

Original language	English
Article number	A83
Pages (from-to)	1-11
Number of pages	11
Journal	Astronomy and Astrophysics
Volume	642
Early online date	9 Oct 2020
DOIs	https://doi.org/10.1051/0004-6361/202038693
Publication status	Published - Oct 2020

Bibliographical note

Reproduced with permission from Astronomy & Astrophysics, Copyright ESO 2020. First published in Astronomy and Astrophysics, 642, A83, 2020, published by EDP Sciences. The original publication is available at https://doi.org/10.1051/0004-6361/202038693. Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.

Keywords

gravitational lensing: weak
methods: statistical
surveys
galaxies: halos
large-scale structure of Universe
dark matter

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10.1051/0004-6361/202038693

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Dvornik, A., Hoekstra, H., Kuijken, K., Wright, A. H., Asgari, M., Bilicki, M., Erben, T., Giblin, B., Graham, A. W., Heymans, C., Hildebrandt, H., Hopkins, A. M., Kannawadi, A., Lin, C. A., Taylor, E. N., & Tröster, T. (2020). KiDS+GAMA: The weak lensing calibrated stellar-to-halo mass relation of central and satellite galaxies. Astronomy and Astrophysics, 642, 1-11. [A83]. https://doi.org/10.1051/0004-6361/202038693

Dvornik, Andrej ; Hoekstra, Henk ; Kuijken, Konrad ; Wright, Angus H. ; Asgari, Marika ; Bilicki, Maciej ; Erben, Thomas ; Giblin, Benjamin ; Graham, Alister W. ; Heymans, Catherine ; Hildebrandt, Hendrik ; Hopkins, Andrew M. ; Kannawadi, Arun ; Lin, Chieh An ; Taylor, Edward N. ; Tröster, Tilman. / KiDS+GAMA : The weak lensing calibrated stellar-to-halo mass relation of central and satellite galaxies. In: Astronomy and Astrophysics. 2020 ; Vol. 642. pp. 1-11.

@article{590f423f528f43a389be17b91296f641,

title = "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 ± 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. ",

keywords = "gravitational lensing: weak, methods: statistical, surveys, galaxies: halos, large-scale structure of Universe, dark matter",

author = "Andrej Dvornik and Henk Hoekstra and Konrad Kuijken and Wright, {Angus H.} and Marika Asgari and Maciej Bilicki and Thomas Erben and Benjamin Giblin and Graham, {Alister W.} and Catherine Heymans and Hendrik Hildebrandt and Hopkins, {Andrew M.} and Arun Kannawadi and Lin, {Chieh An} and Taylor, {Edward N.} and Tilman Tr{\"o}ster",

note = "Reproduced with permission from Astronomy & Astrophysics, Copyright ESO 2020. First published in Astronomy and Astrophysics, 642, A83, 2020, published by EDP Sciences. The original publication is available at https://doi.org/10.1051/0004-6361/202038693. Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.",

year = "2020",

month = oct,

doi = "10.1051/0004-6361/202038693",

language = "English",

volume = "642",

pages = "1--11",

journal = "Astronomy and Astrophysics",

issn = "0004-6361",

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Dvornik, A, Hoekstra, H, Kuijken, K, Wright, AH, Asgari, M, Bilicki, M, Erben, T, Giblin, B, Graham, AW, Heymans, C, Hildebrandt, H, Hopkins, AM, Kannawadi, A, Lin, CA, Taylor, EN & Tröster, T 2020, 'KiDS+GAMA: The weak lensing calibrated stellar-to-halo mass relation of central and satellite galaxies', Astronomy and Astrophysics, vol. 642, A83, pp. 1-11. https://doi.org/10.1051/0004-6361/202038693

KiDS+GAMA : The weak lensing calibrated stellar-to-halo mass relation of central and satellite galaxies. / Dvornik, Andrej; Hoekstra, Henk; Kuijken, Konrad; Wright, Angus H.; Asgari, Marika; Bilicki, Maciej; Erben, Thomas; Giblin, Benjamin; Graham, Alister W.; Heymans, Catherine; Hildebrandt, Hendrik; Hopkins, Andrew M.; Kannawadi, Arun; Lin, Chieh An; Taylor, Edward N.; Tröster, Tilman.

In: Astronomy and Astrophysics, Vol. 642, A83, 10.2020, p. 1-11.

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

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T2 - The weak lensing calibrated stellar-to-halo mass relation of central and satellite galaxies

AU - Dvornik, Andrej

AU - Hoekstra, Henk

AU - Kuijken, Konrad

AU - Wright, Angus H.

AU - Asgari, Marika

AU - Bilicki, Maciej

AU - Erben, Thomas

AU - Giblin, Benjamin

AU - Graham, Alister W.

AU - Heymans, Catherine

AU - Hildebrandt, Hendrik

AU - Hopkins, Andrew M.

AU - Kannawadi, Arun

AU - Lin, Chieh An

AU - Taylor, Edward N.

AU - Tröster, Tilman

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PY - 2020/10

Y1 - 2020/10

N2 - 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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KW - methods: statistical

KW - surveys

KW - galaxies: halos

KW - large-scale structure of Universe

KW - dark matter

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

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