Ralph P. Kraft
Harvard University
368 Papers
3K Citations
Ralph P. Kraft is an academic researcher from Harvard University. The author has contributed to research in topics: Galaxy & Radio galaxy. The author has an hindex of 57, co-authored 331 publications. Previous affiliations of Ralph P. Kraft include CFA Institute & Smithsonian Astrophysical Observatory.
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Papers
Detection of Superluminal Motion in the X-Ray Jet of M87
Bradford Snios,Paul Nulsen,Paul Nulsen,Ralph P. Kraft,C. C. Cheung,Eileen T. Meyer,William R. Forman,Christine Jones,Stephen S. Murray +8 more
TL;DR: Support for this work was provided by the National Aeronautics and Space Administration through Chandra Award Number G07-18104X issued by the Chandra X-ray Observervatory Center as mentioned in this paper.
Irregular Sloshing Cold Fronts in the nearby Merging Groups NGC 7618 and UGC 12491: Evidence for Kelvin-Helmholtz Instabilities
Elke Roediger,Elke Roediger,Ralph P. Kraft,Marie E. Machacek,William R. Forman,Paul Nulsen,Christine Jones,S. S. Murray,S. S. Murray +8 more
TL;DR: In this paper, Chandra observations of the hot atmospheres of the merging galaxy groups centered around NGC 7618 and UGC 12491 were used to detect the presence of arc-like sloshing cold fronts (CFs) around each group center and ~100 kpc long spiral tails in both groups.
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Wide-field Optical Spectroscopy of Abell 133: A Search for Filaments Reported in X-Ray Observations
Thomas Connor,Daniel D. Kelson,John S. Mulchaey,Alexey Vikhlinin,Shannon G. Patel,Michael L. Balogh,Gandhali Joshi,Gandhali Joshi,Ralph P. Kraft,Daisuke Nagai,Svetlana Starikova +10 more
TL;DR: In this article, the authors investigate the kinematic state of Abell 133 and identify the physical locations of filamentary structure in the galaxy distribution, and find no velocity offset between the central galaxy and the cluster.
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VLA Radio Observations of the HST Frontier Fields Cluster Abell 2744: The Discovery of New Radio Relics
Connor J. J. Pearce,Connor J. J. Pearce,R. J. van Weeren,Felipe Andrade-Santos,Christine Jones,William R. Forman,Marcus Brüggen,Esra Bulbul,Tracy Clarke,Ralph P. Kraft,Elinor Medezinski,Tony Mroczkowski,Mario Nonino,Paul Nulsen,Paul Nulsen,Scott Randall,Keiichi Umetsu +16 more
TL;DR: In this article, the authors present new 1-4 GHz Jansky Very Large Array (VLA) and archival Chandra observations of the HST Frontier Fields Cluster Abell 2744.
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The Close AGN Reference Survey (CARS) A massive multi-phase outflow impacting the edge-on galaxy HE 1353-1917
Bernd Husemann,J. Scharwächter,Timothy A. Davis,Miguel A. Pérez-Torres,Miguel A. Pérez-Torres,I. Smirnova-Pinchukova,Grant R. Tremblay,Mirko Krumpe,Francoise Combes,Stefi A. Baum,Stefi A. Baum,Gerold Busch,Thomas Connor,Scott M. Croom,Massimo Gaspari,Ralph P. Kraft,Christopher P. O'Dea,Christopher P. O'Dea,Meredith Powell,M. Singha,Tanya Urrutia +20 more
TL;DR: In this article, the authors combine extensive, spatially-resolved, multi-wavelength observations, taken as part of the Close AGN Reference Survey (CARS), for the edge-on disc galaxy HE 1353−1917 in order to characterise the impact of the active galactic nucleus (AGN) on its host galaxy via outflows and radiation.