dc.contributor.author | Gloudemans, A. J. | |
dc.contributor.author | Duncan, K. J. | |
dc.contributor.author | Kondapally, R. | |
dc.contributor.author | Sabater, J. | |
dc.contributor.author | Cochrane, R. K. | |
dc.contributor.author | Röttgering, H. J. A. | |
dc.contributor.author | Best, P. N. | |
dc.contributor.author | Bonato, M. | |
dc.contributor.author | Bondi, M. | |
dc.contributor.author | Malek, K. | |
dc.contributor.author | McCheyne, I. | |
dc.contributor.author | Smith, D. J. B. | |
dc.contributor.author | Prandoni, I. | |
dc.contributor.author | Wang, L. | |
dc.date.accessioned | 2021-05-05T16:00:18Z | |
dc.date.available | 2021-05-05T16:00:18Z | |
dc.date.issued | 2021-04-07 | |
dc.identifier.citation | Gloudemans , A J , Duncan , K J , Kondapally , R , Sabater , J , Cochrane , R K , Röttgering , H J A , Best , P N , Bonato , M , Bondi , M , Malek , K , McCheyne , I , Smith , D J B , Prandoni , I & Wang , L 2021 , ' LOFAR Properties of SILVERRUSH Lya emitter candidates in the ELAIS-N1 Field ' , Astronomy & Astrophysics , vol. 648 , A7 . https://doi.org/10.1051/0004-6361/202038819 | |
dc.identifier.issn | 0004-6361 | |
dc.identifier.other | ArXiv: http://arxiv.org/abs/2011.08203v1 | |
dc.identifier.other | ORCID: /0000-0001-9708-253X/work/93471035 | |
dc.identifier.uri | http://hdl.handle.net/2299/24397 | |
dc.description | © 2020 ESO | |
dc.description.abstract | Lyman alpha emitters (LAEs) in the Epoch of Reionization (EoR) offer valuable probes of early galaxy evolution and the process of reionization; however, the exact evolution of their abundance and the nature of their emission remain open questions. We combine samples of 229 and 349 LAE candidates at $z=5.7$ and $z=6.6,$ respectively, from the SILVERRUSH narrowband survey with deep Low Frequency Array (LOFAR) radio continuum observations in the ELAIS-N1 field to search for radio galaxies in the EoR and study the low-frequency radio properties of $z\gtrsim5.7$ LAE emitters. Our LOFAR observations reach an unprecedented noise level of $\sim20\,\mu$Jy beam$^{-1}$ at 150MHz, and we detect five candidate LAEs at $>5\sigma$ significance. Based on detailed spectral energy distribution modelling of independent multi-wavelength observations, we conclude that these sources are likely [OII] emitters at $z=1.47$, yielding no reliable $z\gtrsim5.7$ radio galaxy candidates. We examine the 111 $z=5.7$ and $z=6.6$ LAE candidates from our panchromatic photometry catalogue that are undetected by LOFAR, finding contamination rates of 81-92% for the $z=5.7$ and $z=6.6$ subset of the LAE candidate samples. This subset is biased towards brighter magnitudes and redder near-infrared colours. The contamination rates of the full sample will therefore likely be lower than the reported values. Contamination is lowered significantly through constraints on the near-infrared colours, highlighting the need for infrared observations to robustly identify bright LAEs in narrowband surveys. Finally, the stacking of radio continuum observations for the robust LAE samples yields 2$\sigma$ upper limits on radio luminosity of 8.2$\times$10$^{23}$ and 8.7$\times$10$^{23}$ W Hz$^{-1}$ at $z=5.7$ and $6.6$, respectively, corresponding to limits on their median star-formation rates of $ | en |
dc.format.extent | 17 | |
dc.format.extent | 2720570 | |
dc.language.iso | eng | |
dc.relation.ispartof | Astronomy & Astrophysics | |
dc.subject | astro-ph.GA | |
dc.title | LOFAR Properties of SILVERRUSH Lya emitter candidates in the ELAIS-N1 Field | en |
dc.contributor.institution | Centre for Astrophysics Research (CAR) | |
dc.contributor.institution | School of Physics, Engineering & Computer Science | |
dc.contributor.institution | Department of Physics, Astronomy and Mathematics | |
dc.description.status | Peer reviewed | |
rioxxterms.versionofrecord | 10.1051/0004-6361/202038819 | |
rioxxterms.type | Journal Article/Review | |
herts.preservation.rarelyaccessed | true | |