| |  Online-Ressource |
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| Verfasst von: | Hale, Catherine [VerfasserIn]  |
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| | Schwarz, D J [VerfasserIn] |
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| | Best, P N [VerfasserIn] |
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| | Nakoneczny, S J [VerfasserIn] |
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| | Alonso, D [VerfasserIn] |
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| | Bacon, D [VerfasserIn] |
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| | Böhme, L [VerfasserIn] |
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| | Bhardwaj, N [VerfasserIn] |
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| | Bilicki, M [VerfasserIn] |
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| | Camera, S [VerfasserIn] |
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| | Heneka, Caroline [VerfasserIn] |
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| | Pashapour-Ahmadabadi, M [VerfasserIn] |
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| | Tiwari, P [VerfasserIn] |
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| | Zheng, J [VerfasserIn] |
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| | Duncan, K J [VerfasserIn] |
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| | Jarvis, M J [VerfasserIn] |
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| | Kondapally, R [VerfasserIn] |
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| | Magliocchetti, M [VerfasserIn] |
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| | Rottgering, H J A [VerfasserIn] |
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| | Shimwell, T W [VerfasserIn] |
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| Titel: | Cosmology from LOFAR two-metre sky survey data release 2 |
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| Titelzusatz: | angular clustering of radio sources |
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| Verf.angabe: | C.L. Hale, D.J. Schwarz, P.N. Best, S.J. Nakoneczny, D. Alonso, D. Bacon, L. Böhme, N. Bhardwaj, M. Bilicki, S. Camera, C.S. Heneka, M. Pashapour-Ahmadabadi, P. Tiwari, J. Zheng, K.J. Duncan, M.J. Jarvis, R. Kondapally, M. Magliocchetti, H.J.A. Rottgering and T.W. Shimwell |
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| Jahr: | 2024 |
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| Umfang: | 29 S. |
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| Illustrationen: | Illustrationen |
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| Fussnoten: | Gesehen am 05.07.2024 |
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| Titel Quelle: | Enthalten in: Royal Astronomical SocietyMonthly notices of the Royal Astronomical Society |
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| Ort Quelle: | Oxford : Oxford Univ. Press, 1827 |
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| Jahr Quelle: | 2024 |
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| Band/Heft Quelle: | 527(2024), 3 vom: Jan., Seite 6540-6568 |
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| ISSN Quelle: | 1365-2966 |
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| Abstract: | Covering ∼ 5600 deg2 to rms sensitivities of ∼70−100 μJy beam−1 , the LOFAR Two-metre Sky Survey Data Release 2 (LoTSS-DR2) provides the largest low-frequency (∼150 MHz) radio catalogue to date, making it an excellent tool for large-area radio cosmology studies. In this work, we use LoTSS-DR2 sources to investigate the angular two-point correlation function of galaxies within the survey. We discuss systematics in the data and an improved methodology for generating random catalogues, compared to that used for LoTSS-DR1, before presenting the angular clustering for ∼900 000 sources ≥1.5 mJy and a peak signal-to-noise ≥ 7.5 across ∼80 per cent of the observed area. Using the clustering, we infer the bias assuming two evolutionary models. When fitting angular scales of 0.5 ≤ θ < 5◦, using a linear bias model, we find LoTSS-DR2 sources are biased tracers of the underlying matter, with a bias of bC = 2.14+0.22 −0.20 (assuming constant bias) and bE (z = 0) = 1.79+0.15 −0.14 (for an evolving model, inversely proportional to the growth factor), corresponding to bE = 2.81+0.24 −0.22 at the median redshift of our sample, assuming the LoTSS Deep Fields redshift distribution is representative of our data. This reduces to bC = 2.02+0.17 −0.16 and bE (z = 0) = 1.67+0.12 −0.12 when allowing preferential redshift distributions from the Deep Fields to model our data. Whilst the clustering amplitude is slightly lower than LoTSS-DR1 (≥2 mJy), our study benefits from larger samples and improved redshift estimates. |
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| DOI: | doi:10.1093/mnras/stad3088 |
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| URL: | Bitte beachten Sie: Dies ist ein Bibliographieeintrag. Ein Volltextzugriff für Mitglieder der Universität besteht hier nur, falls für die entsprechende Zeitschrift/den entsprechenden Sammelband ein Abonnement besteht oder es sich um einen OpenAccess-Titel handelt.
Volltext: https://doi.org/10.1093/mnras/stad3088 |
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| | DOI: https://doi.org/10.1093/mnras/stad3088 |
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| Datenträger: | Online-Ressource |
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| Sprache: | eng |
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| K10plus-PPN: | 1894165233 |
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| Verknüpfungen: | → Zeitschrift |
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Cosmology from LOFAR two-metre sky survey data release 2 / Hale, Catherine [VerfasserIn]; 2024 (Online-Ressource)
