The contribution of halos with different mass ratios to the overall growth of cluster-sized halos

Doron Lemze; Marc Postman; Shy Genel; Holland C. Ford; Italo Balestra; Megan Donahue; Daniel Kelson; Mario Nonino; Amata Mercurio; Andrea Biviano; Piero Rosati; Keiichi Umetsu; David Sand; Anton Koekemoer; Massimo Meneghetti; Peter Melchior; Andrew B. Newman; Waqas A. Bhatti; G. Mark Voit; Elinor Medezinski; Adi Zitrin; Wei Zheng; Tom Broadhurst; Matthias Bartelmann; Narciso Benitez; Rychard Bouwens; Larry Bradley; Dan Coe; Genevieve Graves; Claudio Grillo; Leopoldo Infante; Yolanda Jimenez-Teja; Stephanie Jouvel; Ofer Lahav; Dan Maoz; Julian Merten; Alberto Molino; John Moustakas; Leonidas Moustakas; Sara Ogaz; Marco Scodeggio; Stella Seitz

doi:https://doi.org/10.1088/0004-637X/776/2/91

The contribution of halos with different mass ratios to the overall growth of cluster-sized halos

Doron Lemze, Marc Postman, Shy Genel, Holland C. Ford, Italo Balestra, Megan Donahue, Daniel Kelson, Mario Nonino, Amata Mercurio, Andrea Biviano, Piero Rosati, Keiichi Umetsu, David Sand, Anton Koekemoer, Massimo Meneghetti, Peter Melchior, Andrew B. Newman, Waqas A. Bhatti, G. Mark Voit, Elinor MedezinskiAdi Zitrin, Wei Zheng, Tom Broadhurst, Matthias Bartelmann, Narciso Benitez, Rychard Bouwens, Larry Bradley, Dan Coe, Genevieve Graves, Claudio Grillo, Leopoldo Infante, Yolanda Jimenez-Teja, Stephanie Jouvel, Ofer Lahav, Dan Maoz, Julian Merten, Alberto Molino, John Moustakas, Leonidas Moustakas, Sara Ogaz, Marco Scodeggio, Stella Seitz

School of Physics and Astronomy

Tel Aviv University

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

Abstract

We provide a new observational test for a key prediction of the ΛCDM cosmological model: the contributions of mergers with different halo-to-main-cluster mass ratios to cluster-sized halo growth. We perform this test by dynamically analyzing 7 galaxy clusters, spanning the redshift range 0.13 < z _c < 0.45 and caustic mass range 0.4-1.5 M _⊙, with an average of 293 spectroscopically confirmed bound galaxies to each cluster. The large radial coverage (a few virial radii), which covers the whole infall region, with a high number of spectroscopically identified galaxies enables this new study. For each cluster, we identify bound galaxies. Out of these galaxies, we identify infalling and accreted halos and estimate their masses and their dynamical states. Using the estimated masses, we derive the contribution of different mass ratios to cluster-sized halo growth. For mass ratios between ∼0.2 and ∼0.7, we find a ∼1σ agreement with ΛCDM expectations based on the Millennium simulations I and II. At low mass ratios, ≲ 0.2, our derived contribution is underestimated since the detection efficiency decreases at low masses, ∼2 × 10¹⁴ M _⊙. At large mass ratios, ≳ 0.7, we do not detect halos probably because our sample, which was chosen to be quite X-ray relaxed, is biased against large mass ratios. Therefore, at large mass ratios, the derived contribution is also underestimated.

Original language	American English
Article number	91
Journal	Astrophysical Journal
Volume	776
Issue number	2
DOIs	https://doi.org/10.1088/0004-637X/776/2/91
State	Published - 20 Oct 2013

Keywords

dark matter
galaxies: kinematics and dynamics

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

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https://doi.org/10.1088/0004-637X/776/2/91

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Lemze, D., Postman, M., Genel, S., Ford, H. C., Balestra, I., Donahue, M., Kelson, D., Nonino, M., Mercurio, A., Biviano, A., Rosati, P., Umetsu, K., Sand, D., Koekemoer, A., Meneghetti, M., Melchior, P., Newman, A. B., Bhatti, W. A., Voit, G. M., ... Seitz, S. (2013). The contribution of halos with different mass ratios to the overall growth of cluster-sized halos. Astrophysical Journal, 776(2), Article 91. https://doi.org/10.1088/0004-637X/776/2/91

@article{a44a9ccb7d004f7a8a89ff49b256c6c4,

title = "The contribution of halos with different mass ratios to the overall growth of cluster-sized halos",

abstract = "We provide a new observational test for a key prediction of the ΛCDM cosmological model: the contributions of mergers with different halo-to-main-cluster mass ratios to cluster-sized halo growth. We perform this test by dynamically analyzing 7 galaxy clusters, spanning the redshift range 0.13 < z c < 0.45 and caustic mass range 0.4-1.5 M ⊙, with an average of 293 spectroscopically confirmed bound galaxies to each cluster. The large radial coverage (a few virial radii), which covers the whole infall region, with a high number of spectroscopically identified galaxies enables this new study. For each cluster, we identify bound galaxies. Out of these galaxies, we identify infalling and accreted halos and estimate their masses and their dynamical states. Using the estimated masses, we derive the contribution of different mass ratios to cluster-sized halo growth. For mass ratios between ∼0.2 and ∼0.7, we find a ∼1σ agreement with ΛCDM expectations based on the Millennium simulations I and II. At low mass ratios, ≲ 0.2, our derived contribution is underestimated since the detection efficiency decreases at low masses, ∼2 × 1014 M ⊙. At large mass ratios, ≳ 0.7, we do not detect halos probably because our sample, which was chosen to be quite X-ray relaxed, is biased against large mass ratios. Therefore, at large mass ratios, the derived contribution is also underestimated.",

keywords = "dark matter, galaxies: kinematics and dynamics",

author = "Doron Lemze and Marc Postman and Shy Genel and Ford, {Holland C.} and Italo Balestra and Megan Donahue and Daniel Kelson and Mario Nonino and Amata Mercurio and Andrea Biviano and Piero Rosati and Keiichi Umetsu and David Sand and Anton Koekemoer and Massimo Meneghetti and Peter Melchior and Newman, {Andrew B.} and Bhatti, {Waqas A.} and Voit, {G. Mark} and Elinor Medezinski and Adi Zitrin and Wei Zheng and Tom Broadhurst and Matthias Bartelmann and Narciso Benitez and Rychard Bouwens and Larry Bradley and Dan Coe and Genevieve Graves and Claudio Grillo and Leopoldo Infante and Yolanda Jimenez-Teja and Stephanie Jouvel and Ofer Lahav and Dan Maoz and Julian Merten and Alberto Molino and John Moustakas and Leonidas Moustakas and Sara Ogaz and Marco Scodeggio and Stella Seitz",

year = "2013",

month = oct,

day = "20",

doi = "https://doi.org/10.1088/0004-637X/776/2/91",

language = "American English",

volume = "776",

journal = "Astrophysical Journal",

issn = "0004-637X",

publisher = "IOP Publishing Ltd.",

number = "2",

}

Lemze, D, Postman, M, Genel, S, Ford, HC, Balestra, I, Donahue, M, Kelson, D, Nonino, M, Mercurio, A, Biviano, A, Rosati, P, Umetsu, K, Sand, D, Koekemoer, A, Meneghetti, M, Melchior, P, Newman, AB, Bhatti, WA, Voit, GM, Medezinski, E, Zitrin, A, Zheng, W, Broadhurst, T, Bartelmann, M, Benitez, N, Bouwens, R, Bradley, L, Coe, D, Graves, G, Grillo, C, Infante, L, Jimenez-Teja, Y, Jouvel, S, Lahav, O, Maoz, D, Merten, J, Molino, A, Moustakas, J, Moustakas, L, Ogaz, S, Scodeggio, M & Seitz, S 2013, 'The contribution of halos with different mass ratios to the overall growth of cluster-sized halos', Astrophysical Journal, vol. 776, no. 2, 91. https://doi.org/10.1088/0004-637X/776/2/91

TY - JOUR

T1 - The contribution of halos with different mass ratios to the overall growth of cluster-sized halos

AU - Lemze, Doron

AU - Postman, Marc

AU - Genel, Shy

AU - Ford, Holland C.

AU - Balestra, Italo

AU - Donahue, Megan

AU - Kelson, Daniel

AU - Nonino, Mario

AU - Mercurio, Amata

AU - Biviano, Andrea

AU - Rosati, Piero

AU - Umetsu, Keiichi

AU - Sand, David

AU - Koekemoer, Anton

AU - Meneghetti, Massimo

AU - Melchior, Peter

AU - Newman, Andrew B.

AU - Bhatti, Waqas A.

AU - Voit, G. Mark

AU - Medezinski, Elinor

AU - Zitrin, Adi

AU - Zheng, Wei

AU - Broadhurst, Tom

AU - Bartelmann, Matthias

AU - Benitez, Narciso

AU - Bouwens, Rychard

AU - Bradley, Larry

AU - Coe, Dan

AU - Graves, Genevieve

AU - Grillo, Claudio

AU - Infante, Leopoldo

AU - Jimenez-Teja, Yolanda

AU - Jouvel, Stephanie

AU - Lahav, Ofer

AU - Maoz, Dan

AU - Merten, Julian

AU - Molino, Alberto

AU - Moustakas, John

AU - Moustakas, Leonidas

AU - Ogaz, Sara

AU - Scodeggio, Marco

AU - Seitz, Stella

PY - 2013/10/20

Y1 - 2013/10/20

N2 - We provide a new observational test for a key prediction of the ΛCDM cosmological model: the contributions of mergers with different halo-to-main-cluster mass ratios to cluster-sized halo growth. We perform this test by dynamically analyzing 7 galaxy clusters, spanning the redshift range 0.13 < z c < 0.45 and caustic mass range 0.4-1.5 M ⊙, with an average of 293 spectroscopically confirmed bound galaxies to each cluster. The large radial coverage (a few virial radii), which covers the whole infall region, with a high number of spectroscopically identified galaxies enables this new study. For each cluster, we identify bound galaxies. Out of these galaxies, we identify infalling and accreted halos and estimate their masses and their dynamical states. Using the estimated masses, we derive the contribution of different mass ratios to cluster-sized halo growth. For mass ratios between ∼0.2 and ∼0.7, we find a ∼1σ agreement with ΛCDM expectations based on the Millennium simulations I and II. At low mass ratios, ≲ 0.2, our derived contribution is underestimated since the detection efficiency decreases at low masses, ∼2 × 1014 M ⊙. At large mass ratios, ≳ 0.7, we do not detect halos probably because our sample, which was chosen to be quite X-ray relaxed, is biased against large mass ratios. Therefore, at large mass ratios, the derived contribution is also underestimated.

AB - We provide a new observational test for a key prediction of the ΛCDM cosmological model: the contributions of mergers with different halo-to-main-cluster mass ratios to cluster-sized halo growth. We perform this test by dynamically analyzing 7 galaxy clusters, spanning the redshift range 0.13 < z c < 0.45 and caustic mass range 0.4-1.5 M ⊙, with an average of 293 spectroscopically confirmed bound galaxies to each cluster. The large radial coverage (a few virial radii), which covers the whole infall region, with a high number of spectroscopically identified galaxies enables this new study. For each cluster, we identify bound galaxies. Out of these galaxies, we identify infalling and accreted halos and estimate their masses and their dynamical states. Using the estimated masses, we derive the contribution of different mass ratios to cluster-sized halo growth. For mass ratios between ∼0.2 and ∼0.7, we find a ∼1σ agreement with ΛCDM expectations based on the Millennium simulations I and II. At low mass ratios, ≲ 0.2, our derived contribution is underestimated since the detection efficiency decreases at low masses, ∼2 × 1014 M ⊙. At large mass ratios, ≳ 0.7, we do not detect halos probably because our sample, which was chosen to be quite X-ray relaxed, is biased against large mass ratios. Therefore, at large mass ratios, the derived contribution is also underestimated.

KW - dark matter

KW - galaxies: kinematics and dynamics

UR - http://www.scopus.com/inward/record.url?scp=84886001084&partnerID=8YFLogxK

U2 - https://doi.org/10.1088/0004-637X/776/2/91

DO - https://doi.org/10.1088/0004-637X/776/2/91

M3 - Article

SN - 0004-637X

VL - 776

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 2

M1 - 91

ER -

The contribution of halos with different mass ratios to the overall growth of cluster-sized halos

Abstract

Keywords

All Science Journal Classification (ASJC) codes

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