Please find the arXiv password below. Thanks again, everyone! ---------- Forwarded message ---------- From: <[email protected]> Date: Mon, Mar 2, 2015 at 5:28 PM Subject: arXiv New submission -> 1503.00045 in astro-ph.CO from [email protected] To: [email protected]
Your submission submit/1195025 has been assigned the permanent arXiv identifier 1503.00045 and is available at: http://arxiv.org/abs/1503.00045 The paper password for this article is: 9kugr Please share this with your co-authors. They may use it to claim ownership. Abstract will appear in today's mailing as: ------------------------------------------------------------------------------ \\ arXiv:1503.00045 From: Jonathan Pober <[email protected]> Date: Sat, 28 Feb 2015 00:55:39 GMT (583kb,D) Title: PAPER-64 Constraints On Reionization II: The Temperature Of The z=8.4 Intergalactic Medium Authors: Jonathan C. Pober, Zaki S. Ali, Aaron R. Parsons, Matthew McQuinn, James E. Aguirre, Gianni Bernardi, Richard F. Bradley, Chris L. Carilli, Carina Cheng, David R. DeBoer, Matthew R. Dexter, Steven R. Furlanetto, Jasper Grobbelaar, Jasper Horrell, Daniel C. Jacobs, Patricia J. Klima, Saul A. Kohn, Adrian Liu, David H. E. MacMahon, Matthys Maree, Andrei Mesinger, David F. Moore, Nima Razavi-Ghods, Irina I. Stefan, William P. Walbrugh, Andre Walker, Haoxuan Zheng Categories: astro-ph.CO Comments: companion paper to arXiv:1502.06016; 10 pages, 6 figures License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/ \\ We present constraints on both the kinetic temperature of the intergalactic medium (IGM) at z=8.4, and on models for heating the IGM at high-redshift with X-ray emission from the first collapsed objects. These constraints are derived using a semi-analytic method to explore the new measurements of the 21 cm power spectrum from the Donald C. Backer Precision Array for Probing the Epoch of Reionization (PAPER), which were presented in a companion paper, Ali et al. (2015). Twenty-one cm power spectra with amplitudes of hundreds of mK^2 can be generically produced if the kinetic temperature of the IGM is significantly below the temperature of the Cosmic Microwave Background (CMB); as such, the new results from PAPER place lower limits on the IGM temperature at z=8.4. Allowing for the unknown ionization state of the IGM, our measurements find the IGM temperature to be above ~5 K for neutral fractions between 10% and 85%, above ~7 K for neutral fractions between 15% and 80%, or above ~10 K for neutral fractions between 30% and 70%. We also calculate the heating of the IGM that would be provided by the observed high redshift galaxy population, and find that for most models, these galaxies are sufficient to bring the IGM temperature above our lower limits. However, there are significant ranges of parameter space that could produce a signal ruled out by the PAPER measurements; models with a steep drop-off in the star formation rate density at high redshifts or with relatively low values for the X-ray to star formation rate efficiency of high redshift galaxies are generally disfavored. The PAPER measurements are consistent with (but do not constrain) a hydrogen spin temperature above the CMB temperature, a situation which we find to be generally predicted if galaxies fainter than the current detection limits of optical/NIR surveys are included in calculations of X-ray heating. \\ Contains: apj.bst: 31892 bytes constraints-eps-converted-to.pdf: 48673 bytes constraints2d_fialkov-eps-converted-to.pdf: 96614 bytes constraints2d_fiducial-eps-converted-to.pdf: 92766 bytes data_pspec.png: 57564 bytes heatcalc_param-eps-converted-to.pdf: 23688 bytes heatcalc_robertson_fix.pdf: 260230 bytes kslices-eps-converted-to.pdf: 49692 bytes ps64science.bbl: 18889 bytes ps64science.tex: 55449 bytes
