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| Título: | Herschel*-ATLAS/GAMA: SDSS cross-correlation induced by weak lensing |
Autor: | González-Nuevo, J. CSIC ORCID; Lapi, Andrea; Negrello, Mattia; Danese, L.; Zotti, G. de; Baes, M.; Bussmann, R. S.; Cai, Z. Y.; Dye, S.; Eales, S.; Ivison, R. J.; Maddox, S. J.; Michalowski, M. J. | Fecha de publicación: | 2014 | Editor: | Oxford University Press Royal Astronomical Society |
Citación: | Monthly Notices of the Royal Astronomical Society 442(3): 2680-2690 (2014) | Resumen: | We report a highly significant (>10σ) spatial correlation between galaxies with S350μm ≥ 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. © 2014 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society. | Descripción: | J. González-Nuevo et al. | Versión del editor: | http://dx.doi.org/10.1093/mnras/stu1041 | URI: | http://hdl.handle.net/10261/110519 | DOI: | 10.1093/mnras/stu1041 | Identificadores: | doi: 10.1093/mnras/stu1041 issn: 0035-8711 e-issn: 1365-2966 |
| Aparece en las colecciones: | (IFCA) Artículos |
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| SDSS cross.pdf | 2,54 MB | Adobe PDF |  Visualizar/Abrir |
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