F
F. Briggs
Researcher at Australian National University
Publications - 34
Citations - 1121
F. Briggs is an academic researcher from Australian National University. The author has contributed to research in topics: Murchison Widefield Array & Redshift. The author has an hindex of 18, co-authored 34 publications receiving 1038 citations. Previous affiliations of F. Briggs include Commonwealth Scientific and Industrial Research Organisation & Australia Telescope National Facility.
Papers
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Journal ArticleDOI
The spin temperature of high-redshift damped Lyman α systems
Nissim Kanekar,Jason X. Prochaska,Alain Smette,Sara L. Ellison,Emma V. Ryan-Weber,Emmanuel Momjian,F. Briggs,W. M. Lane,Jayaram N. Chengalur,T. Delafosse,J. Grave,D. Jacobsen,A. G. de Bruyn +12 more
TL;DR: In this paper, the authors investigated the temperature of neutral gas in high-redshift damped Lyman-α absorbers (DLAs) and found a strong 4σ difference between the Ts distributions in high and low-z (z < 2.4) DLA samples.
Journal ArticleDOI
CHIPS: The Cosmological HI Power Spectrum Estimator
Cathryn M. Trott,B. Pindor,Pietro Procopio,Randall B. Wayth,Daniel A. Mitchell,Benjamin McKinley,Steven Tingay,Nichole Barry,A. P. Beardsley,Gianni Bernardi,Judd D. Bowman,F. Briggs,Roger J. Cappallo,P. Carroll,A. de Oliveira-Costa,Joshua S. Dillon,Aaron Ewall-Wice,Lu Feng,L. J. Greenhill,Bryna J. Hazelton,Jacqueline N. Hewitt,Natasha Hurley-Walker,Melanie Johnston-Hollitt,Daniel C. Jacobs,David L. Kaplan,Han-Seek Kim,Emil Lenc,J. L. B. Line,Avi Loeb,C. J. Lonsdale,Miguel F. Morales,Eric R. Morgan,Abraham R. Neben,Nithyanandan Thyagarajan,Divya Oberoi,A. R. Offringa,Stephen M. Ord,S. Paul,Jonathan C. Pober,Thiagaraj Prabu,J. Riding,N. Udaya Shankar,Shiv K. Sethi,K. S. Srivani,Ravi Subrahmanyan,Ian Sullivan,Max Tegmark,Rachel L. Webster,Andrew R. Williams,Chrysanthi Williams,Chen Wu,J. S. B. Wyithe +51 more
TL;DR: The Cosmological HI Power Spectrum Estimator (CHIPS) as discussed by the authors employs an inverse-covariance weighting of the data through the maximum likelihood estimator, thereby allowing use of the full parameter space for signal estimation.
Journal ArticleDOI
A 189 MHz, 2400 square degree polarization survey with the Murchison Widefield Array 32-element prototype
Gianni Bernardi,L. J. Greenhill,Daniel A. Mitchell,Stephen M. Ord,Bryna J. Hazelton,Bryan Gaensler,A. de Oliveira-Costa,Miguel F. Morales,N. Udaya Shankar,Ravi Subrahmanyan,R. B. Wayth,Emil Lenc,Christopher L. Williams,W. Arcus,S.B. Arora,David G. Barnes,Judd D. Bowman,F. Briggs,John D. Bunton,Roger J. Cappallo,Brian E. Corey,Avinash A. Deshpande,L. deSouza,David Emrich,Robert F. Goeke,David Herne,Jacqueline N. Hewitt,Melanie Johnston-Hollitt,David L. Kaplan,J. C. Kasper,B. B. Kincaid,R. Koenig,Eric Kratzenberg,Colin J. Lonsdale,M. J. Lynch,Stephen R. McWhirter,Eric R. Morgan,Divya Oberoi,Joseph Pathikulangara,Thiagaraj Prabu,Ron Remillard,Alan E. E. Rogers,A. Roshi,Joseph E. Salah,Robert J. Sault,K. S. Srivani,Jamie Stevens,Steven Tingay,M. Waterson,Rachel L. Webster,Alan R. Whitney,Andrew Williams,J. S. B. Wyithe +52 more
TL;DR: In this paper, a Stokes I, Q and U survey at 189 MHz with the Murchison Widefield Array 32-element prototype covering 2400 square degrees is presented, which has a 15.6 arcmin angular resolution and achieves a noise level of 15 mJy/beam.
Proceedings ArticleDOI
The cosmic dawn and epoch of reionisation with SKA
Luitje Koopmans,Jonathan R. Pritchard,Garrelt Mellema,J. E. Aguirre,Kyungjin Ahn,Rennan Barkana,I. van Bemmel,Gianni Bernardi,Anna Bonaldi,F. Briggs,A. G. de Bruyn,Tzu-Ching Chang,Emma Chapman,Xiaoyulong Chen,B. Ciardi,Pratika Dayal,Andrea Ferrara,Anastasia Fialkov,Fabrizio Fiore,Kiyotomo Ichiki,I. T. Illiev,Susumu Inoue,Vibor Jelić,M. Jones,Joseph Lazio,Umberto Maio,Suman Majumdar,Katherine J. Mack,Andrei Mesinger,Miguel F. Morales,A. M. Parsons,U. L. Pen,Maykol Lívio Sampaio Vieira Santos,Raffaella Schneider,B. Semelin,R. S. de Souza,Ravi Subrahmanyan,Tsutomu T. Takeuchi,Harish Vedantham,Jeff Wagg,Rachel L. Webster,S. Wyithe,Kanan K. Datta,Cathryn M. Trott +43 more
TL;DR: The Square Kilometre Array (SKA) as discussed by the authors has been proposed to enable direct imaging of neutral hydrogen from scales of arc-minutes to degrees over most of the redshift range z ∼6-28 with SKA1-LOW, and possibly even higher redshifts with the SKA2-low.
Journal ArticleDOI
Detection of Warm and Cold Phases of the Neutral ISM in a Damped Ly-alpha Absorber
TL;DR: In this paper, the authors presented a detailed study of the HI 21cm absorption system at z = 0.0912 towards the radio quasar B0738+313, where the uncommonly narrow main absorption line and weak secondary line were resolved for the first time.