%0 Generic %1 collaboration2022improved %A Collaboration, The HERA %A Abdurashidova, Zara %A Adams, Tyrone %A Aguirre, James E. %A Alexander, Paul %A Ali, Zaki S. %A Baartman, Rushelle %A Balfour, Yanga %A Barkana, Rennan %A Beardsley, Adam P. %A Bernardi, Gianni %A Billings, Tashalee S. %A Bowman, Judd D. %A Bradley, Richard F. %A Breitman, Daniela %A Bull, Philip %A Burba, Jacob %A Carey, Steve %A Carilli, Chris L. %A Cheng, Carina %A Choudhuri, Samir %A DeBoer, David R. %A Acedo, Eloy de Lera %A Dexter, Matt %A Dillon, Joshua S. %A Ely, John %A Ewall-Wice, Aaron %A Fagnoni, Nicolas %A Fialkov, Anastasia %A Fritz, Randall %A Furlanetto, Steven R. %A Gale-Sides, Kingsley %A Garsden, Hugh %A Glendenning, Brian %A Gorce, Adélie %A Gorthi, Deepthi %A Greig, Bradley %A Grobbelaar, Jasper %A Halday, Ziyaad %A Hazelton, Bryna J. %A Heimersheim, Stefan %A Hewitt, Jacqueline N. %A Hickish, Jack %A Jacobs, Daniel C. %A Julius, Austin %A Kern, Nicholas S. %A Kerrigan, Joshua %A Kittiwisit, Piyanat %A Kohn, Saul A. %A Kolopanis, Matthew %A Lanman, Adam %A La Plante, Paul %A Lewis, David %A Liu, Adrian %A Loots, Anita %A Ma, Yin-Zhe %A MacMahon, David H. E. %A Malan, Lourence %A Malgas, Keith %A Malgas, Cresshim %A Maree, Matthys %A Marero, Bradley %A Martinot, Zachary E. %A McBride, Lisa %A Mesinger, Andrei %A Mirocha, Jordan %A Molewa, Mathakane %A Morales, Miguel F. %A Mosiane, Tshegofalang %A Muñoz, Julian B. %A Murray, Steven G. %A Nagpal, Vighnesh %A Neben, Abraham R. %A Nikolic, Bojan %A Nunhokee, Chuneeta D. %A Nuwegeld, Hans %A Parsons, Aaron R. %A Pascua, Robert %A Patra, Nipanjana %A Pieterse, Samantha %A Qin, Yuxiang %A Razavi-Ghods, Nima %A Robnett, James %A Rosie, Kathryn %A Santos, Mario G. %A Sims, Peter %A Singh, Saurabh %A Smith, Craig %A Swarts, Hilton %A Thyagarajan, Nithyanandan %A Wilensky, Michael J. %A Williams, Peter K. G. %A van Wyngaarden, Pieter %A Zheng, Haoxuan %D 2022 %K library %T Improved Constraints on the 21 cm EoR Power Spectrum and the X-Ray Heating of the IGM with HERA Phase I Observations %U http://arxiv.org/abs/2210.04912 %X 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 (HERA Collaboration 2022a), we find at 95% confidence that $\Delta^2(k = 0.34$ $h$ Mpc$^-1$) $457$ mK$^2$ at $z = 7.9$ and that $\Delta^2 (k = 0.36$ $h$ Mpc$^-1) 3,496$ mK$^2$ 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 (2022b), 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.

@misc{collaboration2022improved, abstract = {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 (HERA Collaboration 2022a), we find at 95% confidence that $\Delta^2(k = 0.34$ $h$ Mpc$^{-1}$) $\leq 457$ mK$^2$ at $z = 7.9$ and that $\Delta^2 (k = 0.36$ $h$ Mpc$^{-1}) \leq 3,496$ mK$^2$ 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 (2022b), 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.}, added-at = {2022-10-12T09:36:07.000+0200}, author = {Collaboration, The HERA and Abdurashidova, Zara and Adams, Tyrone and Aguirre, James E. and Alexander, Paul and Ali, Zaki S. and Baartman, Rushelle and Balfour, Yanga and Barkana, Rennan and Beardsley, Adam P. and Bernardi, Gianni and Billings, Tashalee S. and Bowman, Judd D. and Bradley, Richard F. and Breitman, Daniela and Bull, Philip and Burba, Jacob and Carey, Steve and Carilli, Chris L. and Cheng, Carina and Choudhuri, Samir and DeBoer, David R. and Acedo, Eloy de Lera and Dexter, Matt and Dillon, Joshua S. and Ely, John and Ewall-Wice, Aaron and Fagnoni, Nicolas and Fialkov, Anastasia and Fritz, Randall and Furlanetto, Steven R. and Gale-Sides, Kingsley and Garsden, Hugh and Glendenning, Brian and Gorce, Adélie and Gorthi, Deepthi and Greig, Bradley and Grobbelaar, Jasper and Halday, Ziyaad and Hazelton, Bryna J. and Heimersheim, Stefan and Hewitt, Jacqueline N. and Hickish, Jack and Jacobs, Daniel C. and Julius, Austin and Kern, Nicholas S. and Kerrigan, Joshua and Kittiwisit, Piyanat and Kohn, Saul A. and Kolopanis, Matthew and Lanman, Adam and La Plante, Paul and Lewis, David and Liu, Adrian and Loots, Anita and Ma, Yin-Zhe and MacMahon, David H. E. and Malan, Lourence and Malgas, Keith and Malgas, Cresshim and Maree, Matthys and Marero, Bradley and Martinot, Zachary E. and McBride, Lisa and Mesinger, Andrei and Mirocha, Jordan and Molewa, Mathakane and Morales, Miguel F. and Mosiane, Tshegofalang and Muñoz, Julian B. and Murray, Steven G. and Nagpal, Vighnesh and Neben, Abraham R. and Nikolic, Bojan and Nunhokee, Chuneeta D. and Nuwegeld, Hans and Parsons, Aaron R. and Pascua, Robert and Patra, Nipanjana and Pieterse, Samantha and Qin, Yuxiang and Razavi-Ghods, Nima and Robnett, James and Rosie, Kathryn and Santos, Mario G. and Sims, Peter and Singh, Saurabh and Smith, Craig and Swarts, Hilton and Thyagarajan, Nithyanandan and Wilensky, Michael J. and Williams, Peter K. G. and van Wyngaarden, Pieter and Zheng, Haoxuan}, biburl = {https://www.bibsonomy.org/bibtex/2f4edc5c2b8a6ad856457c805c8c0face/gpkulkarni}, description = {Improved Constraints on the 21 cm EoR Power Spectrum and the X-Ray Heating of the IGM with HERA Phase I Observations}, interhash = {fada20103ec816bcb26d70a1f190469e}, intrahash = {f4edc5c2b8a6ad856457c805c8c0face}, keywords = {library}, note = {cite arxiv:2210.04912Comment: 55 pages, 37 figures. Submitted to ApJ. Corresponding author: Joshua S. Dillon}, timestamp = {2022-10-12T09:36:07.000+0200}, title = {Improved Constraints on the 21 cm EoR Power Spectrum and the X-Ray Heating of the IGM with HERA Phase I Observations}, url = {http://arxiv.org/abs/2210.04912}, year = 2022 }