Determination of z ∼ 0.8 neutral hydrogen fluctuations using the 21 cm intensity mapping autocorrelation
Eric R. Switzer,Kiyoshi Masui,Kevin Bandura,L.-M. Calin,Tzu-Ching Chang,Xuelei Chen,Xuelei Chen,Yi-Chao Li,Yu-Wei Liao,Aravind Natarajan,Ue-Li Pen,Jeffrey B. Peterson,J. R. Shaw,Tabitha Voytek +13 more
TLDR
In this paper, the authors used the auto-power spectrum of 21 cm intensity fluctuations to constrain neutral hydrogen fluctuations at z~0.8, where the dominant synchrotron foregrounds exceed the signal by 10^3 and can be removed efficiently.Abstract:
The large-scale distribution of neutral hydrogen in the Universe will be luminous through its 21 cm emission. Here, for the first time, we use the auto-power spectrum of 21 cm intensity fluctuations to constrain neutral hydrogen fluctuations at z~0.8. Our data were acquired with the Green Bank Telescope and span the redshift range 0.6 < z < 1 over two fields totalling ~41 deg. sq. and 190 h of radio integration time. The dominant synchrotron foregrounds exceed the signal by ~10^3, but have fewer degrees of freedom and can be removed efficiently. Even in the presence of residual foregrounds, the auto-power can still be interpreted as an upper bound on the 21 cm signal. Our previous measurements of the cross-correlation of 21 cm intensity and the WiggleZ galaxy survey provide a lower bound. Through a Bayesian treatment of signal and foregrounds, we can combine both fields in auto- and cross-power into a measurement of Omega_HI b_HI = [0.62^{+0.23}_{-0.15}] * 10^{-3} at 68% confidence with 9% systematic calibration uncertainty, where Omega_HI is the neutral hydrogen (HI) fraction and b_HI is the HI bias parameter. We describe observational challenges with the present data set and plans to overcome them.read more
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Dense magnetized plasma associated with a fast radio burst
Kiyoshi Masui,Kiyoshi Masui,Hsiu-Hsien Lin,Jonathan Sievers,C. J. Anderson,Tzu-Ching Chang,Xuelei Chen,Xuelei Chen,Apratim Ganguly,Miranda Jarvis,C. Y. Kuo,C. Y. Kuo,Yi-Chao Li,Yu-Wei Liao,Maura McLaughlin,Ue-Li Pen,Ue-Li Pen,Ue-Li Pen,Jeffrey B. Peterson,Alexander Roman,Peter T. Timbie,Tabitha Voytek,Tabitha Voytek,Jaswant K. Yadav +23 more
TL;DR: The examination of archival data revealing Faraday rotation in the fast radio burst FRB 110523 is reported, indicating magnetization in the vicinity of the source itself or within a host galaxy.
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Late-time cosmology with 21cm intensity mapping experiments
TL;DR: In this paper, the authors present a framework for forecasting cosmological constraints from future neutral hydrogen intensity mapping experiments at low to intermediate redshifts, and establish a simple way of comparing such surveys with optical galaxy redshift surveys.
Journal ArticleDOI
Cosmology Intertwined: A Review of the Particle Physics, Astrophysics, and Cosmology Associated with the Cosmological Tensions and Anomalies
Elcio Abdalla,G. F. Abell'an,Amin Aboubrahim,Adriano Agnello,Ozgur Akarsu,Yashar Akrami,George Alestas,Daniel Aloni,Luca Amendola,Luis A. Anchordoqui,Richard I. Anderson,Nikki Arendse,Marika Asgari,Mario Ballardini,Vernon Barger,Spyros Basilakos,R. C. Batista,Elia S. Battistelli,Richard A. Battye,Micol Benetti,David Benisty,Asher Berlin,P. de Bernardis,Emanuele Berti,Bohdan Bidenko,Simon Birrer,John P. Blakeslee,Kimberly K. Boddy,Clecio R. Bom,Alexander Bonilla,Nicolas Borghi,F. R. Bouchet,Matteo Braglia,Thomas Buchert,E. Buckley-Geer,Erminia Calabrese,Robert R. Caldwell,David Camarena,Salvatore Capozziello,Stefano Casertano,Geoff C. F. Chen,Jens Chluba,Angela Chen,Hsin-Yu Chen,Anton Chudaykin,Michele Cicoli,Craig J. Copi,Frederic Courbin,Francis-Yan Cyr-Racine,Bozena Czerny,Maria Giovanna Dainotti,Guido D'Amico,Anne-Christine Davis,Javier P'erez,Jaume Haro,Jacques Delabrouille,Peter B. Denton,Suhail Dhawan,Keith R. Dienes,E. Di Valentino,Pu Du,Dominique Eckert,Celia Escamilla-Rivera,A. Fert'e,Fabio Finelli,Pablo Fosalba,Wendy L. Freedman,Noemi Frusciante,Enrique Gaztanaga,William Giarè,Elena Giusarma,Adria G'omez-Valent,Will Handley,Ian Harrison,Luke Hart,Dhiraj Kumar Hazra,Alan Heavens,Asta Heinesen,Hendrik Hildebrandt,Jessica C Hill,Natalie B. Hogg,Daniel E. Holz,Deanna C. Hooper,Nikoo Hosseininejad,Dragan Huterer,Mustapha Ishak,Mikhail M. Ivanov,Andrew H. Jaffe,In Sung Jang,Karsten Jedamzik,Raul Jimenez,Melissa Joseph,Shahab Joudaki,Marc Kamionkowski,Tanvi Karwal,Lavrentios Kazantzidis,Ryan E. Keeley,Michael Klasen,Eiichiro Komatsu,Léon V. E. Koopmans,Suresh Kumar,Luca Lamagna,Ruth Lazkoz,Chung-Chi Lee,Julien Lesgourgues,Jackson Levi Said,Tiffany R. Lewis,Benjamin L'Huiller,Matteo Lucca,Roy Maartens,Lucas M. Macri,Danny Marfatia,Valerio Marra,Carlos Martins,Silvia Masi,Sabino Matarrese,Arindam Mazumdar,Alessandro Melchiorri,Olga Mena,Laura Mersini-Houghton,James B. Mertens,Dinko Milaković,Yuto Minami,V. Miranda,Cristian Moreno-Pulido,Michele Ennio Maria Moresco,David F. Mota,Emil Mottola,Simone Mozzon,J. Muir,Ankan Mukherjee,Suvodip Mukherjee,Pavel Naselsky,Pran Nath,Savvas Nesseris,Florian Niedermann,Alessio Notari,Rafael C. Nunes,Eoin 'O Colg'ain,Kayla A. Owens,Emre Ozulker,Francesco Paresce,Andronikos Paliathanasis,Antonella Palmese,Supriya Pan,Daniela Paoletti,S. E. Perez Bergliaffa,Leadros Perivolaropoulos,Dominic W. Pesce,Valeria Pettorino,Oliver H. E. Philcox,Levon Pogosian,Vivian Poulin,Gaspard Poulot,Marco Roveri,Mark J. Reid,F. Renzi,Adam G. Riess,V. I. Sabla,Paolo Salucci,Vincenzo Salzano,Emmanuel N. Saridakis,Bangalore Suryanarayana Sathyaprakash,Martin Schmaltz,N. Schoneberg,Daniel Scolnic,Anjan A. Sen,Neelima Sehgal,Arman Shafieloo,Mohammmad Mahdi Sheikh-Jabbari,Joseph Silk,Alessandra Silvestri,Foteini Skara,Martin S. Sloth,Marcelle Soares-Santos,Joan Solà Peracaula,Yu-Yang Songsheng,Jorge F. Soriano,Denitsa Staicova,Glenn D. Starkman,István Szapudi,E. Teixera,Brooks Thomas,Tommaso Treu,E. Trott,Carsten van de Bruck,Jose Alberto Vazquez,Licia Verde,Luca Visinelli,Deng Wang,Jian-Min Wang,Shao-Jiang Wang,Richard Watkins,Scott Watson,John K. Webb,Neal Weiner,Amanda Weltman,Samuel J. Witte,Radosław Wojtak,Anil Kumar Yadav,Weiqiang Yang,Gong-Bo Zhao,Miguel Zumalac'arregui +202 more
TL;DR: In this paper , the authors focus on the 5.0σ tension between the Planck CMB estimate of the Hubble constant H0 and the SH0ES collaboration measurements and discuss the importance of trying to fit a full array of data with a single model.
Book
Inflation Physics from the Cosmic Microwave Background and Large Scale Structure.
K. N. Abazajian,Kam Arnold,Jason E. Austermann,Bradford Benson,Colin A. Bischoff,J. Bock,J. R. Bond,J. Borrill,I. Buder,D. L. Burke,Erminia Calabrese,John E. Carlstrom,C. S. Carvalho,C. L. Chang,H. C. Chiang,S. Church,Asantha Cooray,T. M. Crawford,B. P. Crill,Kyle S. Dawson,S. Das,M. J. Devlin,M. Dobbs,Scott Dodelson,O. Doré,Joanna Dunkley,Jonathan L. Feng,A. Fraisse,Jason Gallicchio,Steven B. Giddings,D. Green,N. W. Halverson,S. Hanany,D. Hanson,S. R. Hildebrandt,A. Hincks,R. Hlozek,Gilbert Holder,W. L. Holzapfel,K. Honscheid,G. Horowitz,Wayne Hu,Johannes Hubmayr,K. Irwin,M. Jackson,W. C. Jones,R. Kallosh,Marc Kamionkowski,Brian Keating,Ryan Keisler,William H. Kinney,Lloyd Knox,Eiichiro Komatsu,John M Kovac,Chao-Lin Kuo,Akito Kusaka,C. Lawrence,A. T. Lee,E. M. Leitch,A. Linde,Eric V. Linder,P. Lubin,J. Maldacena,Emil J. Martinec,Jeff McMahon,Amber Miller,Viatcheslav Mukhanov,Laura Newburgh,M. D. Niemack,H. Nguyen,H. T. Nguyen,L. A. Page,C. Pryke,Christian L. Reichardt,J. E. Ruhl,N. Sehgal,U. Seljak,Leonardo Senatore,Jon Sievers,Eva Silverstein,A. Slosar,Kendrick M. Smith,David N. Spergel,Suzanne T. Staggs,Antony A. Stark,R. Stompor,Abigail G. Vieregg,G. Wang,Scott Watson,Edward J. Wollack,W. L. K. Wu,Ki Won Yoon,O. Zahn,M. Zaldarriaga +93 more
TL;DR: For example, a future CMB and large-scale structure (LSS) experiments are poised to test the leading paradigm for these earliest moments and to detect the imprints of the inflationary epoch, thereby dramatically increasing our understanding of fundamental physics and the early universe.
Journal ArticleDOI
New Limits on 21cm EoR From PAPER-32 Consistent with an X-Ray Heated IGM at z=7.7
Aaron R. Parsons,Adrian Liu,James E. Aguirre,Zaki S. Ali,Richard F. Bradley,Chris L. Carilli,David DeBoer,Matthew R. Dexter,Nicole E. Gugliucci,Daniel C. Jacobs,Pat Klima,David MacMahon,Jason Manley,David F. Moore,Jonathan C. Pober,Irina I. Stefan,William P. Walbrugh +16 more
TL;DR: In this article, the authors present new constraints on the 21cm EoR power spectrum derived from 3 months of observing with a 32-antenna, dual-polarization deployment of the Donald C. Backer Precision Array for Probing the Epoch of Reionization (PAPER) in South Africa.
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