Ultra-Red Galaxies Signpost Candidate Proto-Clusters at High Redshift
| Autor: | Axel Weiss, M. Bremer, A. Omont, Elisabetta Valiante, G. de Zotti, V. Arumugam, S. J. Maddox, S. J. Oliver, P. N. Best, Steve Eales, Julie Wardlow, I. Oteo, Loretta Dunne, Julian M Simpson, A. J. R. Lewis, P. van der Werf, Steve Serjeant, Scott Chapman, Z-Y. Zhang, Helmut Dannerbauer, Rob Ivison, D. L. Clements, Dominik Riechers |
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| Přispěvatelé: | Science and Technology Facilities Council (STFC), Science and Technology Facilities Council |
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
submillimeter: galaxies
0306 Physical Chemistry (Incl. Structural) media_common.quotation_subject MU-M FOS: Physical sciences galaxies [submillimeter] galaxies: starburst RADIO GALAXIES Astrophysics Astronomy & Astrophysics 01 natural sciences 0305 Organic Chemistry galaxies [infrared] infrared: galaxies Photometry (optics) galaxies: high-redshift BOLOMETER CAMERA 0103 physical sciences STAR-FORMING GALAXIES clusters: general [galaxies] MIDINFRARED COUNTERPARTS NUMBER COUNTS 010303 astronomy & astrophysics Galaxy cluster media_common Photometric redshift Physics DEGREE EXTRAGALACTIC SURVEY Science & Technology SUBMILLIMETER GALAXIES 010308 nuclear & particles physics starburst [galaxies] Astronomy and Astrophysics Astrophysics - Astrophysics of Galaxies Redshift Galaxy Universe 0201 Astronomical And Space Sciences Space and Planetary Science galaxies: clusters: general Astrophysics of Galaxies (astro-ph.GA) Physical Sciences DENSITY RELATION DEEP-FIELD-SOUTH high-redshift [galaxies] |
| Zdroj: | Lewis, A J R, Ivison, R J, Best, P N, Simpson, J M, Weiss, A, Oteo, I, Zhang, Z-Y, Arumugam, V, Bremer, M N, Chapman, S C, Clements, D L, Dannerbauer, H, Dunne, L, Eales, S, Maddox, S, Oliver, S J, Omont, A, Riechers, D A, Serjeant, S, Valiante, E, Wardlow, J, van der Werf, P & De Zotti, G 2018, ' Ultra-red Galaxies Signpost Candidate Protoclusters at High Redshift ', Astrophysical Journal, vol. 862, no. 2, pp. 96 . https://doi.org/10.3847/1538-4357/aacc25 Lewis, A J R, Ivison, R J, Best, P N, Simpson, J M, Weiss, A, Oteo, I, Zhang, Z Y, Arumugam, V, Bremer, M N, Chapman, S C, Clements, D L, Dannerbauer, H, Dunne, L, Eales, S, Maddox, S, Oliver, S J, Omont, A, Riechers, D A, Serjeant, S, Valiante, E, Wardlow, J, Werf, P V D & Zotti, G D 2018, ' Ultra-Red Galaxies Signpost Candidate Proto-Clusters at High Redshift ', Astrophysical Journal, vol. 862, no. 2, 96 . https://doi.org/10.3847/1538-4357/aacc25 Lewis, A J R, Ivison, R J, Best, P N, Simpson, J M, Weiss, A, Oteo, I, Zhang, Z Y, Arumugam, V, Bremer, M N, Chapman, S C, Clements, D L, Dannerbauer, H, Dunne, L, Eales, S, Maddox, S, Oliver, S J, Omont, A, Riechers, D A, Serjeant, S, Valiante, E, Wardlow, J, Werf, P V D & Zotti, G D 2018, ' Ultra-red Galaxies Signpost Candidate Protoclusters at High Redshift ' Astrophysical Journal, vol. 862, no. 2, 96 . https://doi.org/10.3847/1538-4357/aacc25 Astrophysical Journal, 862(2), 96 Astrophysical journal, 2018, Vol.862(2), pp.96 [Peer Reviewed Journal] The Astrophysical Journal |
| ISSN: | 0004-637X 1538-3881 1538-3873 0067-0049 1538-4357 |
| DOI: | 10.3847/1538-4357/aacc25 |
| Popis: | We present images obtained with LABOCA on the APEX telescope of a sample of 22 galaxies selected via their red Herschel SPIRE 250-, 350- and $500\textrm{-}\mu\textrm{m}$ colors. We aim to see if these luminous, rare and distant galaxies are signposting dense regions in the early Universe. Our $870\textrm{-}\mu\textrm{m}$ survey covers an area of $\approx0.8\,\textrm{deg}^2$ down to an average r.m.s. of $3.9\,\textrm{mJy beam}^{-1}$, with our five deepest maps going $\approx2\times$ deeper still. We catalog 86 DSFGs around our 'signposts', detected above a significance of $3.5\sigma$. This implies a $100\pm30\%$ over-density of $S_{870}>8.5\,\textrm{mJy}$ DSFGs, excluding our signposts, when comparing our number counts to those in 'blank fields'. Thus, we are $99.93\%$ confident that our signposts are pinpointing over-dense regions in the Universe, and $\approx95\%$ confident that these regions are over-dense by a factor of at least $\ge1.5\times$. Using template SEDs and SPIRE/LABOCA photometry we derive a median photometric redshift of $z=3.2\pm0.2$ for our signposts, with an interquartile range of $z=2.8\textrm{-}3.6$. We constrain the DSFGs likely responsible for this over-density to within $|\Delta z|\le0.65$ of their respective signposts. These 'associated' DSFGs are radially distributed within $1.6\pm0.5\,\textrm{Mpc}$ of their signposts, have median SFRs of $\approx(1.0\pm0.2)\times10^3\,M_{\odot}\,\textrm{yr}^{-1}$ (for a Salpeter stellar IMF) and median gas reservoirs of $\sim1.7\times10^{11}\,M_{\odot}$. These candidate proto-clusters have average total SFRs of at least $\approx (2.3\pm0.5)\times10^3\,M_{\odot}\,\textrm{yr}^{-1}$ and space densities of $\sim9\times10^{-7}\,\textrm{Mpc}^{-3}$, consistent with the idea that their constituents may evolve to become massive ETGs in the centers of the rich galaxy clusters we see today. Comment: 24 pages, 13 figures, 5 tables, submitted for publication in ApJ |
| Databáze: | OpenAIRE |
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