دورية أكاديمية
Cosmic evolution of FRI and FRII sources out to z = 2.5
| العنوان: | Cosmic evolution of FRI and FRII sources out to z = 2.5 |
|---|---|
| المؤلفون: | de Jong, Jurjen M.G.H.J., Röttgering, H.J.A., Kondapally, R., Mingo, B., van Weeren, R.J., Best, P.N., Morabito, L.K., Magliocchetti, M., Oonk, J.B.R., Villarrubia-Aguilar, Amalia, Vecchi, F.F. |
| المصدر: | Astronomy & Astrophysics, 683 |
| بيانات النشر: | EDP Sciences |
| سنة النشر: | 2024 |
| المجموعة: | ETH Zürich Research Collection |
| مصطلحات موضوعية: | galaxies: active, galaxies: evolution, galaxies: statistics, radio continuum: galaxies |
| الوصف: | Context: Radio-loud active galactic nuclei (RLAGN) play an important role in the evolution of galaxies through the effects on their environment. The two major morphological classes are core-bright (FRI) and edge-bright (FRII) sources. With the LOw-Frequency ARray (LOFAR), we can now compare the FRI and FRII evolution down to lower flux densities and with larger samples than before. Aims: Our aim is to examine the cosmic space density evolution for FRIs and FRIIs by analyzing their space density evolution between L₁₅₀ ∼ 10²⁴.⁵ W Hz⁻¹ and L150 ∼ 10²⁸.⁵ W Hz⁻¹ and up to z = 2.5. In particular, we look at the space density enhancements and compare the FRI and FRII evolution with the total RLAGN evolution. Methods: We constructed radio luminosity functions (RLFs) from FRI and FRII catalogues based on recent data from LOFAR at 150 MHz to study the space densities as a function of radio luminosity and redshift. These catalogues contain over 100 times the number of FRIs with associated redshifts greater than z = 0.3, compared to the most recent FRI/FRII RLF study. To derive the maximum distance according to which a source can be classified and to correct for detection limits, we conducted simulations of how sources appear across a range of redshifts. Results: Our RLFs do not show any sharp transitions between the space density evolution of FRI and FRII sources as a function of radio luminosity and redshift. We report a space density enhancement from low to high redshift for FRI and FRII sources brighter than L₁₅₀ ∼ 10²⁷ W Hz⁻¹. Furthermore, while we observe a tentative decrease in the space densities of FRIs with luminosities below L₁₅₀ ∼ 10²⁶ W Hz⁻¹ and at redshifts beyond z = 0.8, this may be due to residual selection biases. The FRI/FRII space density ratio does not appear to evolve strongly as a function of radio luminosity and redshift. Conclusions: We argue that the measured space density enhancements above L₁₅₀ ∼ 10²⁷ W Hz⁻¹ are related to the higher gas availability in the earlier, denser universe. The constant ... |
| نوع الوثيقة: | article in journal/newspaper |
| وصف الملف: | application/application/pdf |
| اللغة: | English |
| العلاقة: | info:eu-repo/semantics/altIdentifier/wos/001185001700013; http://hdl.handle.net/20.500.11850/666158Test |
| DOI: | 10.3929/ethz-b-000666158 |
| الإتاحة: | https://doi.org/20.500.11850/666158Test https://doi.org/10.3929/ethz-b-000666158Test https://doi.org/10.1051/0004-6361/202347131Test https://hdl.handle.net/20.500.11850/666158Test |
| حقوق: | info:eu-repo/semantics/openAccess ; http://creativecommons.org/licenses/by/4.0Test/ ; Creative Commons Attribution 4.0 International |
| رقم الانضمام: | edsbas.95378851 |
| قاعدة البيانات: | BASE |
| DOI: | 10.3929/ethz-b-000666158 |
|---|