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The submillimetre view of massive clusters at z ∼ 0.8–1.6

Cooke, EA; Smail, Ian; Stach, SM; Swinbank, AM; Bower, RG; Chen, Chian-Chou; Koyama, Y; Thomson, AP

The submillimetre view of massive clusters at z ∼ 0.8–1.6 Thumbnail


Authors

EA Cooke

SM Stach

RG Bower

Chian-Chou Chen

Y Koyama

AP Thomson



Abstract

We analyse 850 μm continuum observations of eight massive X-ray detected galaxy clusters at z ∼ 0.8–1.6 taken with SCUBA-2 on the James Clerk Maxwell Telescope. We find an average overdensity of 850 μm-selected sources of a factor of 4 ± 2 per cluster within the central 1 Mpc compared to the field. We investigate the multiwavelength properties of these sources and identify 34 infrared counterparts to 26 SCUBA-2 sources. Their colours suggest that the majority of these counterparts are probable cluster members. We use the multi-wavelength far-infrared photometry to measure the total luminosities and total cluster star-formation rates demonstrating that they are roughly three orders of magnitude higher than local clusters. We predict the H-band luminosities of the descendants of our cluster submillimetre galaxies and find that their stellar luminosity distribution is consistent with that of passive elliptical galaxies in z ∼ 0 clusters. Together, the faded descendants of the passive cluster population already in place at z ∼ 1 and the cluster submillimetre galaxies are able to account for the total luminosity function of early-type cluster galaxies at z ∼ 0. This suggests that the majority of the luminous passive population in z ∼ 0 clusters are likely to have formed at z ≫ 1 through an extreme, dust-obscured starburst event.

Citation

Cooke, E., Smail, I., Stach, S., Swinbank, A., Bower, R., Chen, C., …Thomson, A. (2019). The submillimetre view of massive clusters at z ∼ 0.8–1.6. Monthly Notices of the Royal Astronomical Society, 486(3), 3047-3058. https://doi.org/10.1093/mnras/stz955

Journal Article Type Article
Acceptance Date Mar 29, 2019
Online Publication Date Apr 30, 2019
Publication Date Jul 31, 2019
Deposit Date Apr 4, 2019
Publicly Available Date Mar 29, 2024
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 486
Issue 3
Pages 3047-3058
DOI https://doi.org/10.1093/mnras/stz955

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Copyright Statement
© 2019 The Author(s). Published by Oxford University Press on behalf of the Royal Astronomical Society.





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