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Herschel-ATLAS/GAMA: SDSS cross-correlation induced by weak lensing

Gonzalez-Nuevo, J.; Lapi, A.; Negrello, M.; Danese, L.; De Zotti, G.; Amber, S.; Baes, M.; Bland-Hawthorn, J.; Bourne, N.; Brough, S.; Bussmann, R.S.; Cai, Z-Y.; Cooray, A.; Driver, S.P.; Dunne, L.; Dye, S.; Eales, S.; Ibar, E.; Ivison, R.; Liske, J.; Loveday, J.; Maddox, S.; Micha owski, M.J.; Robotham, A.S.G.; Scott, D.; Smith, M.W.L.; Valiante, E.; Xia, J-Q.

Authors

J. Gonzalez-Nuevo

A. Lapi

M. Negrello

L. Danese

G. De Zotti

S. Amber

M. Baes

J. Bland-Hawthorn

N. Bourne

S. Brough

R.S. Bussmann

Z-Y. Cai

A. Cooray

S.P. Driver

L. Dunne

S. Dye

S. Eales

E. Ibar

R. Ivison

J. Liske

J. Loveday

S. Maddox

M.J. Micha owski

A.S.G. Robotham

D. Scott

M.W.L. Smith

E. Valiante

J-Q. Xia



Abstract

We report a highly significant (>10σ) spatial correlation between galaxies with S350 μm ≥ 30 mJy detected in the equatorial fields of the Herschel Astrophysical Terahertz Large Area Survey (H-ATLAS) with estimated redshifts ≳ 1.5, and Sloan Digital Sky Survey (SDSS) or Galaxy And Mass Assembly (GAMA) galaxies at 0.2 ≤ z ≤ 0.6. The significance of the cross-correlation is much higher than those reported so far for samples with non-overlapping redshift distributions selected in other wavebands. Extensive, realistic simulations of clustered sub-mm galaxies amplified by foreground structures confirm that the cross-correlation can be explained by weak gravitational lensing (μ < 2). The simulations also show that the measured amplitude and range of angular scales of the signal are larger than can be accounted for by galaxy–galaxy weak lensing. However, for scales ≲ 2 arcmin, the signal can be reproduced if SDSS/GAMA galaxies act as signposts of galaxy groups/clusters with halo masses in the range 1013.2–1014.5 M⊙. The signal detected on larger scales appears to reflect the clustering of such haloes.

Journal Article Type Article
Publication Date Jun 26, 2014
Journal Monthly Notices of the Royal Astronomical Society
Print ISSN 0035-8711
Electronic ISSN 1365-2966
Publisher Oxford University Press (OUP)
Peer Reviewed Peer Reviewed
Volume 442
Issue 3
APA6 Citation Gonzalez-Nuevo, J., Lapi, A., Negrello, M., Danese, L., De Zotti, G., Amber, S., …Xia, J. (2014). Herschel-ATLAS/GAMA: SDSS cross-correlation induced by weak lensing. Monthly Notices of the Royal Astronomical Society, 442(3), doi:10.1093/mnras/stu1041
DOI https://doi.org/10.1093/mnras/stu1041
Keywords methods: statistical, cosmology: observations, large-scale structure of Universe, infrared: galaxies
Publisher URL https://academic.oup.com/mnras/article-lookup/doi/10.1093/mnras/stu1041
Copyright Statement Copyright information regarding this work can be found at the following address: http://eprints.nottingh.../end_user_agreement.pdf
Additional Information This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©: 2014 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.

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Copyright Statement
Copyright information regarding this work can be found at the following address: http://eprints.nottingham.ac.uk/end_user_agreement.pdf





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