AMI-LA observations of the SuperCLASS supercluster
| Autor: | T. M. Cantwell, C. J. Riseley, Tz Jin, Chao-Ling Hung, David Titterington, T. W. B. Muxlow, Amm Scaife, Caitlin M. Casey, Mark Birkinshaw, Paul F. Scott, Yvette C. Perrott, Richard A. Battye, Neal Jackson, Ian Harrison, Michael L. Brown, Robert Beswick, K. J. B. Grainge, Patrick J. Elwood, B. Watson, Christopher A. Hales, Jack Hickish, Nima Razavi-Ghods, C. Demetroullas, S. H. Carey |
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| Přispěvatelé: | Perrott, Yvette Chanel [0000-0002-6255-8240], Razavi-Ghods, Nima [0000-0003-2930-5396], Titterington, David [0000-0003-1431-920X], Apollo - University of Cambridge Repository |
| Rok vydání: | 2018 |
| Předmět: |
Cosmology and Nongalactic Astrophysics (astro-ph.CO)
media_common.quotation_subject Arcminute Microkelvin Imager Population radio continuum: general FOS: Physical sciences Astrophysics Astrophysics::Cosmology and Extragalactic Astrophysics clusters: general [Galaxies] Surveys 01 natural sciences clusters [Galaxies] Spectral line surveys Supercluster 0103 physical sciences education 010303 astronomy & astrophysics Astrophysics::Galaxy Astrophysics media_common Physics education.field_of_study 010308 nuclear & particles physics general [Radio continuum] Astronomy and Astrophysics Astrophysics - Astrophysics of Galaxies Redshift Galaxy Space and Planetary Science Sky galaxies: clusters: general Astrophysics of Galaxies (astro-ph.GA) Astrophysics - Cosmology and Nongalactic Astrophysics Superclass |
| Zdroj: | Riseley, C J, Grainge, K J B, Perrott, Y C, Scaife, A M M, Battye, R A, Beswick, R J, Birkinshaw, M, Brown, M L, Casey, C M, Demetroullas, C, Hales, C A, Harrison, I, Hung, C L, Jackson, N J, Muxlow, T, Watson, B, Cantwell, T M, Carey, S H, Elwood, P J, Hickish, J, Jin, T Z, Razavi-Ghods, N, Scott, P F & Titterington, D J 2018, ' AMI-LA observations of the SuperCLASS supercluster ', Monthly Notices of the Royal Astronomical Society, vol. 474, no. 4, stx3118, pp. 5598-5613 . https://doi.org/10.1093/mnras/stx3118 Riseley, C J, Grainge, K, Perrott, Y C, Scaife, A, Battye, R, Beswick, R, Birkinshaw, M, Brown, M, Casey, C M, Demetroullas, C, Hales, CA, Harrison, I, Hung, C L, Jackson, N, Muxlow, T, Watson, R, Cantwell, T, Carey, S H, Elwood, P J, Hickish, J, Jin, T Z, Razavi-Ghods, N, Scott, P F & Titterington, D J 2018, ' AMI-LA observations of the SuperCLASS supercluster ', Monthly Notices of the Royal Astronomical Society, vol. 474, no. 4, pp. 5598-5613 . https://doi.org/10.1093/mnras/stx3118, https://doi.org/10.1093/mnras/stx3118 |
| DOI: | 10.17863/cam.30887 |
| Popis: | We present a deep survey of the SuperCLASS super-cluster - a region of sky known to contain five Abell clusters at redshift $z\sim0.2$ - performed using the Arcminute Microkelvin Imager (AMI) Large Array (LA) at 15.5$~$GHz. Our survey covers an area of approximately 0.9 square degrees. We achieve a nominal sensitivity of $32.0~\mu$Jy beam$^{-1}$ toward the field centre, finding 80 sources above a $5\sigma$ threshold. We derive the radio colour-colour distribution for sources common to three surveys that cover the field and identify three sources with strongly curved spectra - a high-frequency-peaked source and two GHz-peaked-spectrum sources. The differential source count (i) agrees well with previous deep radio source count, (ii) exhibits no evidence of an emerging population of star-forming galaxies, down to a limit of 0.24$~$mJy, and (iii) disagrees with some models of the 15$~$GHz source population. However, our source count is in agreement with recent work that provides an analytical correction to the source count from the SKADS Simulated Sky, supporting the suggestion that this discrepancy is caused by an abundance of flat-spectrum galaxy cores as-yet not included in source population models. Comment: 17 pages, 14 figures, 3 tables. Accepted for publication in MNRAS |
| Databáze: | OpenAIRE |
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