Joseph F. Hennawi
University of California, Santa Barbara
308 Papers
5.8K Citations
Joseph F. Hennawi is an academic researcher from University of California, Santa Barbara. The author has contributed to research in topics: Quasar & Galaxy. The author has an hindex of 75, co-authored 269 publications. Previous affiliations of Joseph F. Hennawi include Princeton University & University of California, Berkeley.
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Papers
Binary Quasars at High Redshift II: Sub-Mpc Clustering at z ~ 3-4
Yue Shen,Yue Shen,Joseph F. Hennawi,Joseph F. Hennawi,Francesco Shankar,Adam D. Myers,Michael A. Strauss,S. G. Djorgovski,Xiaohui Fan,Carlo Giocoli,Ashish Mahabal,Donald P. Schneider,David H. Weinberg +12 more
TL;DR: In this article, the small-scale (0.1 ≲ r ≲ 1 h^(-1) Mpc) quasar two-point correlation function at z>2.9 was measured for a flux-limited (i < 21) sample of 15 binary quasars compiled by Hennawi et al.
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Ionization near-zones associated with quasars at z ~ 6
Chris Carilli,Ran Wang,Ran Wang,Xiaohui Fan,Fabian Walter,Jaron Kurk,Dominik A. Riechers,Jeff Wagg,Joseph F. Hennawi,Lin-Hua Jiang,Karl M. Menten,Frank Bertoldi,Michael A. Strauss,Pierre Cox +13 more
TL;DR: In this article, the authors analyzed the size evolution of HII regions around 27 quasars between z=5.7 to 6.4 ('quasar near-zones' or NZ) and found that the near-zone sizes increase with quasar UV luminosity, as expected for photo-ionization dominated by quasar radiation.
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Discovery of 24 radio-bright quasars at 4:9
A. J. Gloudemans,Kenneth Duncan,A. Saxena,Yuichi Harikane,G. J. Hill,Gregory R. Zeimann,Huub Rottgering,D. Q. Yang,P. N. Best,Eduardo Bañados,A. Drabent,Martin J. Hardcastle,Joseph F. Hennawi,George B. Lansbury,Manuela Magliocchetti,George K. Miley,Riccardo Nanni,Timothy W. Shimwell,Bram Venemans,J. Wagenveld +19 more
TL;DR: In this paper , the authors presented the discovery of 20 new quasars (and the independent confirmation of four) between 4 . 9 ≤ z ≤ 6 . 6.
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Small-scale Intensity Mapping: Extended Halos as a Probe of the Ionizing Escape Fraction and Faint Galaxy Populations during Reionization
Lluís Mas-Ribas,Joseph F. Hennawi,Mark Dijkstra,Frederick B. Davies,Jonathan Stern,Hans-Walter Rix +5 more
TL;DR: In this paper, the authors present a method to quantify the value of the escape fraction of ionizing photons, and the existence of ultra-faint galaxies clustered around brighter objects during the epoch of cosmic reionization.
Spatially Resolving the Kinematics of the ≲ 100 μas Quasar Broad-line Region Using Spectroastrometry
TL;DR: In this paper, the authors measured the spatial position centroid of emission-line photons as a function of velocity and calculated the expected spectroastrometric signal of a rotation-dominated broad line region (BLR) for various assumptions about the ratio of random to rotational motions and the radial distribution of the BLR gas.
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