The Clustering of Star-Forming and Passive Galaxies at z similar to 2

O. Almaini; W. Hartley; S. Foucaud; K. Lane; C. J. Conselice; R. J. McLure; M. Cirasuolo; J. S. Dunlop; I. Smail; C. Simpson

The Clustering of Star-Forming and Passive Galaxies at z similar to 2

O. Almaini, W. Hartley, S. Foucaud, K. Lane, C. J. Conselice, R. J. McLure, M. Cirasuolo, J. S. Dunlop, I. Smail, C. Simpson

School of Physics and Astronomy

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract / Description of output

We present early results on the clustering of galaxies at z similar to 2, selected using the BzK colour technique from the UKIDSS Ultra-Deep Survey (UDS). The passive (pBzK) galaxies are the most strongly clustered, consistent with inhabiting dark-matter halos in excess of 1013 MID at these redshifts. Star-forming (sBzK) galaxies are less strongly clustered, but reveal an excess of pairs on small scales (< 1Mpc) which suggest multiple halo occupation. The number counts of these populations are also markedly different, with the pBzK galaxies showing a sharp flattening beyond K-AB = 21, while the counts of star-forming (sBzK) galaxies continue to rise steeply towards faint magnitudes. We conclude that only very luminous galaxies (M-K(AB) < -23) are passively evolving at z similar to 2, and these inhabit the most massive dark-matter halos. These findings are consistent with the 'downsizing' scenario for the build-up of the passive red sequence.

Original language	English
Title of host publication	PANORAMIC VIEWS OF GALAXY FORMATION AND EVOLUTION, PROCEEDINGS
Editors	T Kodama, T Yamada, K Aoki
Place of Publication	SAN FRANCISCO
Publisher	ASTRONOMICAL SOC PACIFIC
Pages	90-93
Number of pages	4
ISBN (Print)	978-1-58381-668-4
Publication status	Published - 2008
Event	International Conference on Panoramic Views of Galaxy Formation and Evolution - Hayama Duration: 11 Dec 2007 → 16 Dec 2007

Conference

Conference	International Conference on Panoramic Views of Galaxy Formation and Evolution
City	Hayama
Period	11/12/07 → 16/12/07

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@inproceedings{751ff1b022714095bec09c2170c05675,

title = "The Clustering of Star-Forming and Passive Galaxies at z similar to 2",

abstract = "We present early results on the clustering of galaxies at z similar to 2, selected using the BzK colour technique from the UKIDSS Ultra-Deep Survey (UDS). The passive (pBzK) galaxies are the most strongly clustered, consistent with inhabiting dark-matter halos in excess of 1013 MID at these redshifts. Star-forming (sBzK) galaxies are less strongly clustered, but reveal an excess of pairs on small scales (< 1Mpc) which suggest multiple halo occupation. The number counts of these populations are also markedly different, with the pBzK galaxies showing a sharp flattening beyond K-AB = 21, while the counts of star-forming (sBzK) galaxies continue to rise steeply towards faint magnitudes. We conclude that only very luminous galaxies (M-K(AB) < -23) are passively evolving at z similar to 2, and these inhabit the most massive dark-matter halos. These findings are consistent with the 'downsizing' scenario for the build-up of the passive red sequence.",

author = "O. Almaini and W. Hartley and S. Foucaud and K. Lane and Conselice, {C. J.} and McLure, {R. J.} and M. Cirasuolo and Dunlop, {J. S.} and I. Smail and C. Simpson",

year = "2008",

language = "English",

isbn = "978-1-58381-668-4",

pages = "90--93",

editor = "T Kodama and T Yamada and K Aoki",

booktitle = "PANORAMIC VIEWS OF GALAXY FORMATION AND EVOLUTION, PROCEEDINGS",

publisher = "ASTRONOMICAL SOC PACIFIC",

note = "International Conference on Panoramic Views of Galaxy Formation and Evolution ; Conference date: 11-12-2007 Through 16-12-2007",

}

Almaini, O, Hartley, W, Foucaud, S, Lane, K, Conselice, CJ, McLure, RJ, Cirasuolo, M, Dunlop, JS, Smail, I & Simpson, C 2008, The Clustering of Star-Forming and Passive Galaxies at z similar to 2. in T Kodama, T Yamada & K Aoki (eds), PANORAMIC VIEWS OF GALAXY FORMATION AND EVOLUTION, PROCEEDINGS. ASTRONOMICAL SOC PACIFIC, SAN FRANCISCO, pp. 90-93, International Conference on Panoramic Views of Galaxy Formation and Evolution, Hayama, 11/12/07.

TY - GEN

T1 - The Clustering of Star-Forming and Passive Galaxies at z similar to 2

AU - Almaini, O.

AU - Hartley, W.

AU - Foucaud, S.

AU - Lane, K.

AU - Conselice, C. J.

AU - McLure, R. J.

AU - Cirasuolo, M.

AU - Dunlop, J. S.

AU - Smail, I.

AU - Simpson, C.

PY - 2008

Y1 - 2008

N2 - We present early results on the clustering of galaxies at z similar to 2, selected using the BzK colour technique from the UKIDSS Ultra-Deep Survey (UDS). The passive (pBzK) galaxies are the most strongly clustered, consistent with inhabiting dark-matter halos in excess of 1013 MID at these redshifts. Star-forming (sBzK) galaxies are less strongly clustered, but reveal an excess of pairs on small scales (< 1Mpc) which suggest multiple halo occupation. The number counts of these populations are also markedly different, with the pBzK galaxies showing a sharp flattening beyond K-AB = 21, while the counts of star-forming (sBzK) galaxies continue to rise steeply towards faint magnitudes. We conclude that only very luminous galaxies (M-K(AB) < -23) are passively evolving at z similar to 2, and these inhabit the most massive dark-matter halos. These findings are consistent with the 'downsizing' scenario for the build-up of the passive red sequence.

AB - We present early results on the clustering of galaxies at z similar to 2, selected using the BzK colour technique from the UKIDSS Ultra-Deep Survey (UDS). The passive (pBzK) galaxies are the most strongly clustered, consistent with inhabiting dark-matter halos in excess of 1013 MID at these redshifts. Star-forming (sBzK) galaxies are less strongly clustered, but reveal an excess of pairs on small scales (< 1Mpc) which suggest multiple halo occupation. The number counts of these populations are also markedly different, with the pBzK galaxies showing a sharp flattening beyond K-AB = 21, while the counts of star-forming (sBzK) galaxies continue to rise steeply towards faint magnitudes. We conclude that only very luminous galaxies (M-K(AB) < -23) are passively evolving at z similar to 2, and these inhabit the most massive dark-matter halos. These findings are consistent with the 'downsizing' scenario for the build-up of the passive red sequence.

M3 - Conference contribution

SN - 978-1-58381-668-4

SP - 90

EP - 93

BT - PANORAMIC VIEWS OF GALAXY FORMATION AND EVOLUTION, PROCEEDINGS

A2 - Kodama, T

A2 - Yamada, T

A2 - Aoki, K

PB - ASTRONOMICAL SOC PACIFIC

CY - SAN FRANCISCO

T2 - International Conference on Panoramic Views of Galaxy Formation and Evolution

Y2 - 11 December 2007 through 16 December 2007

ER -

The Clustering of Star-Forming and Passive Galaxies at z similar to 2

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