2023ApJ...945..124H

Query : 2023ApJ...945..124H

2023ApJ...945..124H - Astrophys. J., 945, 124 (2023/March-2)

Improved Constraints on the 21 cm EoR Power Spectrum and the X-Ray Heating of the IGM with HERA Phase I Observations.

HERA COLLABORATION, ABDURASHIDOVA Z., ADAMS T., AGUIRRE J.E., ALEXANDER P., ALI Z.S., BAARTMAN R., BALFOUR Y., BARKANA R., BEARDSLEY A.P., BERNARDI G., BILLINGS T.S., BOWMAN J.D., BRADLEY R.F., BREITMAN D., BULL P., BURBA J., CAREY S., CARILLI C.L., CHENG C., CHOUDHURI S., DEBOER D.R., DE LERA ACEDO E., DEXTER M., DILLON J.S., ELY J., EWALL-WICE A., FAGNONI N., FIALKOV A., FRITZ R., FURLANETTO S.R., GALE-SIDES K., GARSDEN H., GLENDENNING B., GORCE A., GORTHI D., GREIG B., GROBBELAAR J., HALDAY Z., HAZELTON B.J., HEIMERSHEIM S., HEWITT J.N., HICKISH J., JACOBS D.C., JULIUS A., KERN N.S., KERRIGAN J., KITTIWISIT P., KOHN S.A., KOLOPANIS M., LANMAN A., LA PLANTE P., LEWIS D., LIU A., LOOTS A., MA Y.-Z., MacMAHON D.H.E., MALAN L., MALGAS K., MALGAS C., MAREE M., MARERO B., MARTINOT Z.E., McBRIDE L., MESINGER A., MIROCHA J., MOLEWA M., MORALES M.F., MOSIANE T., MUNOZ J.B., MURRAY S.G., NAGPAL V., NEBEN A.R., NIKOLIC B., NUNHOKEE C.D., NUWEGELD H., PARSONS A.R., PASCUA R., PATRA N., PIETERSE S., QIN Y., RAZAVI-GHODS N., ROBNETT J., ROSIE K., SANTOS M.G., SIMS P., SINGH S., SMITH C., SWARTS H., TAN J., THYAGARAJAN N., WILENSKY M.J., WILLIAMS P.K.G., VAN WYNGAARDEN P. and ZHENG H.

Abstract (from CDS):

We report the most sensitive upper limits to date on the 21 cm epoch of reionization power spectrum using 94 nights of observing with Phase I of the Hydrogen Epoch of Reionization Array (HERA). Using similar analysis techniques as in previously reported limits, we find at 95% confidence that Δ2(k = 0.34 h Mpc–1) ≤ 457 mK2 at z = 7.9 and that Δ2(k = 0.36 h Mpc–1) ≤ 3496 mK2 at z = 10.4, an improvement by a factor of 2.1 and 2.6, respectively. These limits are mostly consistent with thermal noise over a wide range of k after our data quality cuts, despite performing a relatively conservative analysis designed to minimize signal loss. Our results are validated with both statistical tests on the data and end-to-end pipeline simulations. We also report updated constraints on the astrophysics of reionization and the cosmic dawn. Using multiple independent modeling and inference techniques previously employed by HERA Collaboration, we find that the intergalactic medium must have been heated above the adiabatic cooling limit at least as early as z = 10.4, ruling out a broad set of so-called “cold reionization” scenarios. If this heating is due to high-mass X-ray binaries during the cosmic dawn, as is generally believed, our result's 99% credible interval excludes the local relationship between soft X-ray luminosity and star formation and thus requires heating driven by evolved low-metallicity stars.

Abstract Copyright: © 2023. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): Astronomy data analysis - Radio interferometers - Intergalactic medium - Reionization - Galaxy formation - Cosmology

Simbad objects: 6

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Number of rows : 6
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 NGC 1316 rG 03 22 41.789 -37 12 29.52 9.81 9.15 8.53 7.66   ~ 1491 1
2 NAME Per B SyG 04 37 04.37535450 +29 40 13.8179631   21.7       ~ 533 2
3 3C 273 BLL 12 29 06.6998257176 +02 03 08.597629980   13.05 14.830 14.11   ~ 6022 1
4 GLEAM J172031-005845 Rad 17 20 31.2 -00 58 45           ~ 1 0
5 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 16269 0
6 ESO 75-41 BLL 21 57 05.9801262624 -69 41 23.686042524   14.23 13.79 12.94   ~ 299 1

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