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Herschel-ATLAS : The spatial clustering of low and high redshift submillimetre galaxies

Amvrosiadis, A, Valiante, E, Gonzalez-Nuevo, J, Maddox, S J ORCID:, Negrello, M ORCID:, Eales, S A ORCID:, Dunne, L ORCID:, Wang, L, van Kampen, E, De Zotti, G, Smith, M ORCID:, Andreani, P, Greenslade, J, Tai-An, C and Michalowski, M J 2018. Herschel-ATLAS : The spatial clustering of low and high redshift submillimetre galaxies. Monthly Notices of the Royal Astronomical Society , sty3013. 10.1093/mnras/sty3013

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We present measurements of the angular correlation function of sub-millimeter (sub-mm) galaxies (SMGs) identified in four out of the five fields of the Herschel Astrophysical Terahertz Large Area Survey (H-ATLAS) − GAMA-9h, GAMA-12h, GAMA-15h and NGP − with flux densities S250μm>30 mJy at 250 μm. We show that galaxies selected at this wavelength trace the underlying matter distribution differently at low and high redshifts. We study the evolution of the clustering finding that at low redshifts sub-mm galaxies exhibit clustering strengths of r0 ∼ 2 − 3 h−1Mpc, below z < 0.3. At high redshifts, on the other hand, we find that sub-mm galaxies are more strongly clustered with correlation lengths r0 = 8.1 ± 0.5, 8.8 ± 0.8 and 13.9 ± 3.9 h−1Mpc at z = 1 − 2, 2 − 3 and 3 − 5, respectively. We show that sub-mm galaxies across the redshift range 1 < z < 5, typically reside in dark-matter halos of mass of the order of ∼ 1012.5 − 1013.0h−1M⊙ and are consistent with being the progenitors of local massive elliptical galaxies that we see in the local Universe.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Publisher: Oxford University Press
ISSN: 0035-8711
Date of First Compliant Deposit: 14 November 2018
Date of Acceptance: 10 November 2018
Last Modified: 13 May 2023 20:40

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