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The SAMI Galaxy Survey: the cluster redshift survey, target selection and cluster properties

Owers, M.S.; Allen, J.T.; Baldry, I.; Bryant, J.J.; Cecil, G.N.; Cortese, L.; Croom, S.M.; Driver, S.P.; Fogarty, L.M.R.; Green, A.W.; Helmich, E.; de Jong, J.T.A.; Kuijken, K.; Mahajan, S.; McFarland, J.; Pracy, M.B.; Robotham, A.G.S.; Sikkema, G.; Sweet, S.; Taylor, E.N.; Verdoes Kleijn, G.; Bauer, A.E.; Bland-Hawthorn, J.; Brough, S.; Colless, M.; Couch, W.J.; Davies, R.L.; Drinkwater, M.J.; Goodwin, M.; Hopkins, A.M.; Konstantopoulos, I.S.; Foster, C.; Lawrence, J.S.; Lorente, N.P.F.; Medling, A.M.; Metcalfe, N.; Richards, S.N.; van de Sande, J.; Scott, N.; Shanks, T.; Sharp, R.; Thomas, A.D.; Tonini, C.

The SAMI Galaxy Survey: the cluster redshift survey, target selection and cluster properties Thumbnail


M.S. Owers

J.T. Allen

I. Baldry

J.J. Bryant

G.N. Cecil

L. Cortese

S.M. Croom

S.P. Driver

L.M.R. Fogarty

A.W. Green

E. Helmich

J.T.A. de Jong

K. Kuijken

S. Mahajan

J. McFarland

M.B. Pracy

A.G.S. Robotham

G. Sikkema

S. Sweet

E.N. Taylor

G. Verdoes Kleijn

A.E. Bauer

J. Bland-Hawthorn

S. Brough

M. Colless

W.J. Couch

R.L. Davies

M.J. Drinkwater

M. Goodwin

A.M. Hopkins

I.S. Konstantopoulos

C. Foster

J.S. Lawrence

N.P.F. Lorente

A.M. Medling

S.N. Richards

J. van de Sande

N. Scott

T. Shanks

R. Sharp

A.D. Thomas

C. Tonini


We describe the selection of galaxies targeted in eight low-redshift clusters (APMCC0917, A168, A4038, EDCC442, A3880, A2399, A119 and A85; 0.029 < z < 0.058) as part of the Sydney-AAO Multi-Object Integral field spectrograph Galaxy Survey (SAMI-GS). We have conducted a redshift survey of these clusters using the AAOmega multi-object spectrograph on the 3.9-m Anglo-Australian Telescope. The redshift survey is used to determine cluster membership and to characterize the dynamical properties of the clusters. In combination with existing data, the survey resulted in 21 257 reliable redshift measurements and 2899 confirmed cluster member galaxies. Our redshift catalogue has a high spectroscopic completeness (∼94 per cent) for rpetro ≤ 19.4 and cluster-centric distances R < 2R200. We use the confirmed cluster member positions and redshifts to determine cluster velocity dispersion, R200, virial and caustic masses, as well as cluster structure. The clusters have virial masses 14.25 ≤ log(M200/M⊙) ≤ 15.19. The cluster sample exhibits a range of dynamical states, from relatively relaxed-appearing systems, to clusters with strong indications of merger-related substructure. Aperture- and point spread function matched photometry are derived from Sloan Digital Sky Survey and VLT Survey Telescope/ATLAS imaging and used to estimate stellar masses. These estimates, in combination with the redshifts, are used to define the input target catalogue for the cluster portion of the SAMI-GS. The primary SAMI-GS cluster targets have R <R200, velocities |vpec| < 3.5σ200 and stellar masses 9.5≤log(M∗approx/ 9.5≤log(Mapprox∗/ M⊙)≤12. Finally, we give an update on the SAMI-GS progress for the cluster regions.


Owers, M., Allen, J., Baldry, I., Bryant, J., Cecil, G., Cortese, L., …Tonini, C. (2017). The SAMI Galaxy Survey: the cluster redshift survey, target selection and cluster properties. Monthly Notices of the Royal Astronomical Society, 468(2), 1824-1849.

Journal Article Type Article
Acceptance Date Mar 2, 2017
Online Publication Date Mar 8, 2017
Publication Date Jun 21, 2017
Deposit Date May 9, 2017
Publicly Available Date May 17, 2017
Journal Monthly Notices of the Royal Astronomical Society
Print ISSN 0035-8711
Electronic ISSN 1365-2966
Publisher Royal Astronomical Society
Peer Reviewed Peer Reviewed
Volume 468
Issue 2
Pages 1824-1849


Published Journal Article (8.1 Mb)

Copyright Statement
This article has been published in Monthly Notices of the Royal Astronomical Society ©: 2017 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.

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