Modelling the luminosities and sizes of radio galaxies: radio luminosity function at z = 6. Saxena, A., Röttgering, H. J. A., & Rigby, E. E. ArXiv e-prints, 1705:arXiv:1705.03449, May, 2017. ![Modelling the luminosities and sizes of radio galaxies: radio luminosity function at z = 6 [link]](https://bibbase.org/img/filetypes/link.svg "link")
Paper abstract bibtex We present a model to predict the luminosity function for radio galaxies and their linear size distribution at any redshift. The model takes a black hole mass function and Eddington ratio distribution as input and tracks the evolution of radio sources, taking into account synchrotron, adiabatic and inverse Compton energy losses. We first test the model at z = 2 where plenty of radio data is available and show that the radio luminosity function (RLF) is consistent with observations. We are able to reproduce the break in luminosity function that separates locally the FRI and FRII radio sources. Our prediction for linear size distribution at z = 2 matches the observed distribution too. We then use our model to predict a RLF and linear size distribution at z = 6, as this is the epoch when radio galaxies can be used as probes of reionisation. We demonstrate that higher inverse Compton losses lead to shorter source lifetimes and smaller sizes at high redshifts. The predicted sizes are consistent with the generally observed trend with redshift. We evolve the z = 2 RLF based on observed quasar space densities at high redshifts, and show that our RLF prediction at z = 6 is consistent. Finally, we predict the detection of 0.63, 0.092 and 0.0025 z\textgreater=6 sources per sq. degree at flux density limits of 0.1, 0.5 and 3.5 mJy. We assess the trade-off between coverage area and depth and show that LOFAR surveys with flux density limits of 0.1 and 0.5 mJy would are the most efficient at detecting a large number of z\textgreater=6 radio sources.
@article{saxena_modelling_2017,
title = {Modelling the luminosities and sizes of radio galaxies: radio luminosity function at z = 6},
volume = {1705},
shorttitle = {Modelling the luminosities and sizes of radio galaxies},
url = {http://adsabs.harvard.edu/abs/2017arXiv170503449S},
abstract = {We present a model to predict the luminosity function for radio galaxies
and their linear size distribution at any redshift. The model takes a
black hole mass function and Eddington ratio distribution as input and
tracks the evolution of radio sources, taking into account synchrotron,
adiabatic and inverse Compton energy losses. We first test the model at
z = 2 where plenty of radio data is available and show that the radio
luminosity function (RLF) is consistent with observations. We are able
to reproduce the break in luminosity function that separates locally the
FRI and FRII radio sources. Our prediction for linear size distribution
at z = 2 matches the observed distribution too. We then use our model to
predict a RLF and linear size distribution at z = 6, as this is the
epoch when radio galaxies can be used as probes of reionisation. We
demonstrate that higher inverse Compton losses lead to shorter source
lifetimes and smaller sizes at high redshifts. The predicted sizes are
consistent with the generally observed trend with redshift. We evolve
the z = 2 RLF based on observed quasar space densities at high
redshifts, and show that our RLF prediction at z = 6 is consistent.
Finally, we predict the detection of 0.63, 0.092 and 0.0025 z{\textgreater}=6
sources per sq. degree at flux density limits of 0.1, 0.5 and 3.5 mJy.
We assess the trade-off between coverage area and depth and show that
LOFAR surveys with flux density limits of 0.1 and 0.5 mJy would are the
most efficient at detecting a large number of z{\textgreater}=6 radio sources.},
urldate = {2017-05-16},
journal = {ArXiv e-prints},
author = {Saxena, A. and Röttgering, H. J. A. and Rigby, E. E.},
month = may,
year = {2017},
keywords = {Astrophysics - Astrophysics of Galaxies},
pages = {arXiv:1705.03449},
}
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We first test the model at z = 2 where plenty of radio data is available and show that the radio luminosity function (RLF) is consistent with observations. We are able to reproduce the break in luminosity function that separates locally the FRI and FRII radio sources. Our prediction for linear size distribution at z = 2 matches the observed distribution too. We then use our model to predict a RLF and linear size distribution at z = 6, as this is the epoch when radio galaxies can be used as probes of reionisation. We demonstrate that higher inverse Compton losses lead to shorter source lifetimes and smaller sizes at high redshifts. The predicted sizes are consistent with the generally observed trend with redshift. We evolve the z = 2 RLF based on observed quasar space densities at high redshifts, and show that our RLF prediction at z = 6 is consistent. Finally, we predict the detection of 0.63, 0.092 and 0.0025 z\\textgreater=6 sources per sq. degree at flux density limits of 0.1, 0.5 and 3.5 mJy. 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The model takes a\nblack hole mass function and Eddington ratio distribution as input and\ntracks the evolution of radio sources, taking into account synchrotron,\nadiabatic and inverse Compton energy losses. We first test the model at\nz = 2 where plenty of radio data is available and show that the radio\nluminosity function (RLF) is consistent with observations. We are able\nto reproduce the break in luminosity function that separates locally the\nFRI and FRII radio sources. Our prediction for linear size distribution\nat z = 2 matches the observed distribution too. We then use our model to\npredict a RLF and linear size distribution at z = 6, as this is the\nepoch when radio galaxies can be used as probes of reionisation. We\ndemonstrate that higher inverse Compton losses lead to shorter source\nlifetimes and smaller sizes at high redshifts. The predicted sizes are\nconsistent with the generally observed trend with redshift. We evolve\nthe z = 2 RLF based on observed quasar space densities at high\nredshifts, and show that our RLF prediction at z = 6 is consistent.\nFinally, we predict the detection of 0.63, 0.092 and 0.0025 z{\\textgreater}=6\nsources per sq. degree at flux density limits of 0.1, 0.5 and 3.5 mJy.\nWe assess the trade-off between coverage area and depth and show that\nLOFAR surveys with flux density limits of 0.1 and 0.5 mJy would are the\nmost efficient at detecting a large number of z{\\textgreater}=6 radio sources.},\n\turldate = {2017-05-16},\n\tjournal = {ArXiv e-prints},\n\tauthor = {Saxena, A. and Röttgering, H. J. A. and Rigby, E. E.},\n\tmonth = may,\n\tyear = {2017},\n\tkeywords = {Astrophysics - Astrophysics of Galaxies},\n\tpages = {arXiv:1705.03449},\n}\n\n","author_short":["Saxena, A.","Röttgering, H. J. A.","Rigby, E. 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