Constraining high-redshift X-ray sources with next generation 21-cm power spectrum measurements
| العنوان: | Constraining high-redshift X-ray sources with next generation 21-cm power spectrum measurements |
|---|---|
| المؤلفون: | Adrian Liu, Jonathan C. Pober, Andrei Mesinger, Jacqueline N. Hewitt, Joshua S. Dillon, Aaron Ewall-Wice |
| المساهمون: | Massachusetts Institute of Technology. Department of Physics, MIT Kavli Institute for Astrophysics and Space Research, Ewall-Wice, Aaron Michael, Hewitt, Jacqueline N, Dillon, Joshua Shane, Liu, Adrian Chi-Yan, Ewall-Wice, Aaron, Hewitt, Jacqueline, Mesinger, Andrei, Dillon, Joshua S., Liu, Adrian, Pober, Jonathan |
| المصدر: | arXiv Monthly Notices of the Royal Astronomical Society |
| بيانات النشر: | Oxford University Press, 2016. |
| سنة النشر: | 2016 |
| مصطلحات موضوعية: | Cosmology and Nongalactic Astrophysics (astro-ph.CO), FOS: Physical sciences, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, 01 natural sciences, 7. Clean energy, 0103 physical sciences, Astronomical interferometer, 010303 astronomy & astrophysics, Reionization, Physics, 010308 nuclear & particles physics, Astrophysics::Instrumentation and Methods for Astrophysics, Spectral density, Astronomy, Astronomy and Astrophysics, Observable, HERA, Astrophysics - Astrophysics of Galaxies, Redshift, Amplitude, 13. Climate action, Space and Planetary Science, Astrophysics of Galaxies (astro-ph.GA), Dark Ages, Astrophysics - Cosmology and Nongalactic Astrophysics |
| الوصف: | We use the Fisher matrix formalism and seminumerical simulations to derive quantitative predictions of the constraints that power spectrum measurements on next-generation interferometers, such as the Hydrogen Epoch of Reionization Array (HERA) and the Square Kilometre Array (SKA), will place on the characteristics of the X-ray sources that heated the high-redshift intergalactic medium. Incorporating observations between z = 5 and 25, we find that the proposed 331 element HERA and SKA phase 1 will be capable of placing ≲ 10 per cent constraints on the spectral properties of these first X-ray sources, even if one is unable to perform measurements within the foreground contaminated ‘wedge’ or the FM band. When accounting for the enhancement in power spectrum amplitude from spin temperature fluctuations, we find that the observable signatures of reionization extend well beyond the peak in the power spectrum usually associated with it. We also find that lower redshift degeneracies between the signatures of heating and reionization physics lead to errors on reionization parameters that are significantly greater than previously predicted. Observations over the heating epoch are able to break these degeneracies and improve our constraints considerably. For these two reasons, 21-cm observations during the heating epoch significantly enhance our understanding of reionization as well. National Science Foundation (U.S.) (AST-0821321) National Science Foundation (U.S.) (1122374) United States. National Aeronautics and Space Administration (HST-HF2-51363.001-A) National Science Foundation (U.S.) (1302774) |
| وصف الملف: | application/pdf |
| اللغة: | English |
| الوصول الحر: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::43e6657f07c57da777748de64a2b0793Test https://orcid.org/0000-0002-4117-570XTest |
| حقوق: | OPEN |
| رقم الانضمام: | edsair.doi.dedup.....43e6657f07c57da777748de64a2b0793 |
| قاعدة البيانات: | OpenAIRE |
| الوصف غير متاح. |