Cosmic Reionization and the 21 cm Signal: Comparison between an Analytical Model and a Simulation
نویسندگان
چکیده
منابع مشابه
COSMIC REIONIZATION AND THE 21 cm SIGNAL: COMPARISON BETWEEN AN ANALYTICAL MODEL AND A SIMULATION
We measure several properties of the reionization process and the corresponding low-frequency 21 cm signal associated with the neutral hydrogen distribution, using a large volume, high-resolution simulation of cosmic reionization. The brightness temperature of the 21 cm signal is derived by postprocessing this numerical simulationwith a semianalytical prescription. Our study extends to high red...
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We measure several properties of the reionization process and the corresponding low-frequency 21-cm signal associated with the neutral hydrogen distribution, using a large volume, high resolution simulation of cosmic reionization. The simulation involving 24 billion dark matter particles utilizes a hybrid code with a particle-mesh N-body algorithm for dark matter and prescriptions for baryons a...
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چکیده ندارد.
Reionization and the large-scale 21 cm-cosmic microwave background cross correlation
Of the many probes of reionization, the 21 cm line and the cosmic microwave background (CMB) are among the most effective. We examine how the cross-correlation of the 21 cm brightness and the CMB Doppler fluctuations on large angular scales can be used to study this epoch. We employ a new model of the growth of large scale fluctuations of the ionized fraction as reionization proceeds. We take i...
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ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 2008
ISSN: 0004-637X,1538-4357
DOI: 10.1086/592487