Navigation überspringen
Universitätsbibliothek Heidelberg
Status: Bibliographieeintrag

Verfügbarkeit
Standort: ---
Exemplare: ---

+ Andere Auflagen/Ausgaben
heiBIB
 Online-Ressource
Verfasst von:Nakoneczny, Szymon [VerfasserIn]   i
 Alonso, D. [VerfasserIn]   i
 Bilicki, M. [VerfasserIn]   i
 Schwarz, D. J. [VerfasserIn]   i
 Hale, C. L. [VerfasserIn]   i
 Pollo, A. [VerfasserIn]   i
 Heneka, Caroline [VerfasserIn]   i
 Tiwari, P. [VerfasserIn]   i
 Zheng, J. [VerfasserIn]   i
 Brüggen, M. [VerfasserIn]   i
 Jarvis, M. J. [VerfasserIn]   i
 Shimwell, T. W. [VerfasserIn]   i
Titel:Cosmology from LOFAR two-metre sky survey data release 2
Titelzusatz:cross-correlation with the cosmic microwave background
Verf.angabe:S.J. Nakoneczny, D. Alonso, M. Bilicki, D.J. Schwarz, C.L. Hale, A. Pollo, C. Heneka, P. Tiwari, J. Zheng, M. Brüggen, M.J. Jarvis, and T.W. Shimwell
E-Jahr:2024
Jahr:January 2024
Umfang:15 S.
Illustrationen:Illustrationen
Fussnoten:Online veröffentlicht: 25. Januar 2024 ; Gesehen am 28.06.2024
Titel Quelle:Enthalten in: Astronomy and astrophysics
Ort Quelle:Les Ulis : EDP Sciences, 1969
Jahr Quelle:2024
Band/Heft Quelle:681(2024) vom: Jan., Artikel-ID A105, Seite 1-15
ISSN Quelle:1432-0746
Abstract:Aims. We combined the LOw-Frequency ARray (LOFAR) Two-metre Sky Survey (LoTSS) second data release (DR2) catalogue with gravitational lensing maps from the cosmic microwave background (CMB) to place constraints on the bias evolution of LoTSS-detected radio galaxies, and on the amplitude of matter perturbations. Methods. We constructed a flux-limited catalogue from LoTSS DR2, and analysed its harmonic-space cross-correlation with CMB lensing maps from Planck, Cℓgk, as well as its auto-correlation, Cℓgg. We explored the models describing the redshift evolution of the large-scale radio galaxy bias, discriminating between them through the combination of both Cℓgk and Cℓgg. Fixing the bias evolution, we then used these data to place constraints on the amplitude of large-scale density fluctuations, parametrised by σ8. Results. We report the significance of the Cℓgk signal at a level of 26.6σ. We determined that a linear bias evolution of the form bg(z) = bg,D/D(z), where D(z) is the growth rate, is able to provide a good description of the data, and we measured bg,D = 1.41 ± 0.06 for a sample that is flux limited at 1.5 mJy, for scales ℓ < 250 for Cℓgg, and ℓ < 500 for Cℓgk. At the sample’s median redshift, we obtained b(z = 0.82) = 2.34 ± 0.10. Using σ8 as a free parameter, while keeping other cosmological parameters fixed to the Planck values, we found fluctuations of σ8 = 0.75−0.04+0.05. The result is in agreement with weak lensing surveys, and at 1σ difference with Planck CMB constraints. We also attempted to detect the late-time-integrated Sachs-Wolfe effect with LOFAR data; however, with the current sky coverage, the cross-correlation with CMB temperature maps is consistent with zero. Our results are an important step towards constraining cosmology with radio continuum surveys from LOFAR and other future large radio surveys.
DOI:doi:10.1051/0004-6361/202347728
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.

kostenfrei: Volltext: https://doi.org/10.1051/0004-6361/202347728
 kostenfrei: Volltext: https://www.aanda.org/articles/aa/abs/2024/01/aa47728-23/aa47728-23.html
 DOI: https://doi.org/10.1051/0004-6361/202347728
Datenträger:Online-Ressource
Sprache:eng
Bibliogr. Hinweis:Errata: Nakoneczny, Szymon: Cosmology from LOFAR two-metre sky survey data release 2
K10plus-PPN:1892412071
Verknüpfungen:→ Zeitschrift

Permanenter Link auf diesen Titel (bookmarkfähig):  https://katalog.ub.uni-heidelberg.de/titel/69227284   QR-Code
zum Seitenanfang