Thomas Sotiriou Curriculum Vitae
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Modified Julian Date Timing Residual
NEWSLETTER February 2015 Issue no. 10 0.003 0.002 0.001 0.000 Timing residual [s] 0.001 − 0.002 − 45000 45500 46000 46500 47000 Modified Julian Date The timing residual (difference between the measured times of arrival of pulses and the timing model) for the crab pulsar, collected using data from the Crab ephermis. Figure courtesy G. Ashton See http://gp.iop.org for more details Gravitational Physics Group February 2015 Table of Contents Welcome from the Chair .................................................... 3 Events ................................................................................ 5 Young Theorists’ Forum 2013 ......................................................................... 5 New Frontiers in Dynamical Gravity ............................................................... 5 BritGrav 2014 .................................................................................................... 6 Prizes ................................................................................. 8 2014 GPG Thesis Prize .................................................................................... 8 Contributed Articles ........................................................... 9 The effect of timing noise on continuous gravitational wave searches ..... 9 Black holes and scalar hair ........................................................................... 17 Untangling precession: Modelling the gravitational wave signal from precessing black hole binaries .................................................................... -
Curriculum Vitae
Christopher Berry Personal Department Address Email Telephone Information School of Physics & Astronomy [email protected] +44 (0) 1214 146541 University of Birmingham Edgbaston Website Twitter Birmingham cplberry.com @cplberry B15 2TT Education University of Birmingham September 2014 { April 2015 PGCert (Associate Module) Foundation of Learning & Teaching in Higher Education Institute of Astronomy, University of Cambridge October 2009 { August 2013 PhD in Astronomy Supervisor: Jonathan Gair Exploring gravity with strong-field tests and gravitational waves. Theoretical study of what can be learned about astrophysical systems and the nature of gravity from gravitational probes, in particular gravitational waves. Funded by STFC and the Cambridge Philosophical Society. Churchill College, University of Cambridge October 2005 { July 2009 BA (Hons), MSci Natural Sciences Part III Experimental & Theoretical Physics 1st Part II Experimental & Theoretical Physics 1st Part IB Physics, Advanced Physics, Mathematics 1st Part IA Physics, Materials & Mineral Science, Geology, Mathematics 1st Worcester College of Technology September 2004 { June 2005 Certificate in Management (Level 3) Distinction Introductory Certificate in Management (Level 3) Distinction Droitwich Spa High School & Sixth Form Centre September 1998 { June 2004 STEP Mathematics II, Mathematics III 1 A-level Physics, Maths, Further Maths, General Studies A AS-level Geography A GCSE 10 (including Maths, English and French) 9 A*s, 1 A Honours, Awards 2018 IOP Astroparticle Physics Early -
J CQG BK 0315 Highlights-A4-4.Indd
INVITED Strings, branes, supergravity Constraining conformal field ARTICLE theories with a slightly broken Classical and and gauge theory higher spin symmetry Juan Maldacena and Alexander Zhiboedov FTC Quantum Gravity Quantum supersymmetric cosmology 2013 Class. Quantum Grav. 30 104003 and its hidden Kac-Moody structure “Determines the leading form of the correlation functions in the CFT dual for a large class of higher spin theories, using only very general properties of the T Damour and P Spindel theory. The resulting form of the correlation functions is highly constrained. Highlights of 2013–2014 2013 Class. Quantum Grav. 30 162001 These universal results will likely play an important part in the development of “This is a an elegant paper, where ingredients such as supersymmetry, group holographic duality for higher spin.” Comment from Editorial Board theory, fundamental physics, the early universe and lateral comments to other areas come together in a highly technical article that is brief but very Welcome to the 2015 CQG Highlights brochure, featuring some of the best papers informative. This work shows how quantum cosmology without supersymmetry cannot be ignored.” Comment from Editorial Board Holography without strings? published during the last 12 months, as selected by our Editorial Board. 14% Donald3.6 Marolf As the centenary of Albert Einstein’s discovery of general relativity, 2015 will be an 2014 Class. Quantum Grav. 31 015008 exciting year for the CQG community. To mark this occasion, CQG will publish a special 12% TOPICAL Double field theory: REVIEW “Emphasizes the role of the gravitational Gauus law constraint and issue of the journal entitled ‘Milestones of General Relativity’, which will review some of a pedagogical review entanglement3.4 in the bulk in holography. -
Tidal Invariants for Compact Binaries on Quasi-Circular Orbits
Tidal invariants for compact binaries on quasi-circular orbits Sam R. Dolan,1, ∗ Patrick Nolan,2 Adrian C. Ottewill,2 Niels Warburton,2 and Barry Wardell3 1Consortium for Fundamental Physics, School of Mathematics and Statistics, University of Sheffield, Hicks Building, Hounsfield Road, Sheffield S3 7RH, United Kingdom. 2School of Mathematical Sciences and Complex & Adaptive Systems Laboratory, University College Dublin, Belfield, Dublin 4, Ireland. 3Department of Astronomy, Cornell University, Ithaca, NY 14853, USA. (Dated: September 20, 2018) We extend the gravitational self-force approach to encompass `self-interaction' tidal effects for a compact body of mass µ on a quasi-circular orbit around a black hole of mass M µ. Specifically, we define and calculate at O(µ) (conservative) shifts in the eigenvalues of the electric- and magnetic-type tidal tensors, and a (dissipative) shift in a scalar product between their eigenbases. This approach yields four gauge-invariant functions, from which one may construct other tidal quantities such as the curvature scalars and the speciality index. First, we analyze the general case of a geodesic in a regular perturbed vacuum spacetime admitting a helical Killing vector and a reflection symmetry. Next, we specialize to focus on circular orbits in the equatorial plane of Kerr spacetime at O(µ). We present accurate numerical results for the Schwarzschild case for orbital radii up to the light-ring, calculated via independent implementations in Lorenz and Regge-Wheeler gauges. We show that our results are consistent with leading-order post-Newtonian expansions, and demonstrate the existence of additional structure in the strong-field regime. We anticipate that our strong-field results will inform (e.g.) effective one-body models for the gravitational two-body problem that are invaluable in the ongoing search for gravitational waves. -
Einstein, Eddington, and the Eclipse: Travel Impressions
EINSTEIN, EDDINGTON, AND THE ECLIPSE: TRAVEL IMPRESSIONS ESSAY 195 INTRODUCTION The total solar eclipse that occurred on 29 May 1919—perhaps considered the most famous solar eclipse ever—was exceptional for a variety of scientific, political, social, and even religious reasons. At just over five minutes of totality (more precisely, 302 seconds), it was a long eclipse. Behind the sun appeared the Taurus constellation, which included the Hyades, the brightest star cluster in the ecliptic. The preparations of the British teams that observed it, and which are the subject of this essay, took place in the middle of the Great War, during a period of international instability. The observation locations selected by these specialists were in the tropics, in distant regions unknown to most astronomers, and thus required extensive preparations. These places included the city of Sobral, in the north-eastern state of Ceará in Brazil, and the equatorial island of Príncipe, then part of the Portuguese empire, and today part of the Republic of São Tomé and Príncipe. Located in the Gulf of Guinea on the West African coast, Príncipe was then known as one of the world’s largest cocoa producers, and was under international suspicion for practicing slave labour. Additionally, among the teams of expeditionary astronomers from various countries—including the United Kingdom, the United States, and Brazil—there was not just one, but two British teams. This was an uncommon choice given the material, as well as the scientific and financial effort involved, accentuated by the unfavourable context of the war. The expedition that observed at Príncipe included Arthur Stanley Eddington (1882– 1944), the astrophysicist and young director of the Cambridge Observatory, as well as the clockmaker and calculator Edwin Turner Cottingham (1869–1940); the expedition that visited Brazil included Andrew Claude de la Cherois Crommelin (1865–1939), and Charles Rundle Davidson (1875–1970), both experienced astronomers at the Greenwich Observatory (see pp. -
JAHRESSTATISTIK 2019 Impressum
JAHRESSTATISTIK 2019 Impressum Herausgeber: Max-Planck-Institut für extraterrestrische Physik Redaktion und Layout: W. Collmar, B. Niebisch Personal 1 Personal 2019 Direktoren Prof. Dr. B. Huber, Präsident der Ludwig-Maximilians-Uni- Prof. Dr. R. Bender, Optische und Interpretative Astrono- versität, München mie, gleichzeitig Lehrstuhl für Astronomie/Astrophysik Dr. F. Merkle, OHB System AG, Bremen an der Ludwig-Maximilians-Universität München Dr. U. von Rauchhaupt, Frankfurter Allgemeine Zeitung, Prof. Dr. P. Caselli, Zentrum für Astrochemische Studien Frankfurt/Main (Geschäftsführung) Prof. R. Rodenstock, Optische Werke G. Rodenstock Prof. Dr. R. Genzel, Infrarot- und Submillimeter-Astrono- GmbH & Co. KG, München mie, gleichzeitig Prof. of Physics, University of California, Dr. J. Rubner, Bayerischer Rundfunk, München Berkeley (USA) Dr. M. Wolter, Bayer. Staatsministerium für Wirtschaft, Prof. Dr. K. Nandra, Hochenergie-Astrophysik Energie und Technologie, München Prof. Dr. G. Haerendel (emeritiertes wiss. Mitglied) Prof. Dr. R. Lüst (emeritiertes wiss. Mitglied) Fachbeirat Prof. Dr. G. Morfi ll (emeritiertes wiss. Mitglied) Prof. Dr. C. Canizares, MIT, Kavli Institute, Cambridge (USA) Prof. Dr. K. Pinkau (emeritiertes wiss. Mitglied) Prof. Dr. A. Celotti, SISSA, Trieste (Italien) Prof. Dr. J. Trümper (emeritiertes wiss. Mitglied) Prof. Dr. N. Evans, The University of Texas at Austin, Selbstständige Nachwuchsgruppen Austin (USA) Dr. J. Dexter Prof. Dr. K. Freeman, Mt Stromlo Observatory, Weston Dr. S. Gillessen Creek (Australien) Prof. Dr. A. Goodman, Harvard-Smithsonian Center for MPG Fellow Astrophysics, Cambridge (USA) Prof. Dr. J. Mohr (LMU) Prof. Dr. R. C. Kennicutt, University of Arizona, Tucson (USA) & Texas A&M University, College Station (USA) Direktionsassistent Prof. Dr. K. Kuijken, Universiteit Leiden, Leiden (Nieder- Dr. D. Lutz lande) Prof. -
One of the Most Celebrated Physics Experiments of the 20Th Cent
Not Only Because of Theory: Dyson, Eddington and the Competing Myths of the 1919 Eclipse Expedition Introduction One of the most celebrated physics experiments of the 20th century, a century of many great breakthroughs in physics, took place on May 29th, 1919 in two remote equatorial locations. One was the town of Sobral in northern Brazil, the other the island of Principe off the west coast of Africa. The experiment in question concerned the problem of whether light rays are deflected by gravitational forces, and took the form of astrometric observations of the positions of stars near the Sun during a total solar eclipse. The expedition to observe the eclipse proved to be one of those infrequent, but recurring, moments when astronomical observations have overthrown the foundations of physics. In this case it helped replace Newton’s Law of Gravity with Einstein’s theory of General Relativity as the generally accepted fundamental theory of gravity. It also became, almost immediately, one of those uncommon occasions when a scientific endeavor captures and holds the attention of the public throughout the world. In recent decades, however, questions have been raised about possible bias and poor judgment in the analysis of the data taken on that famous day. It has been alleged that the best known astronomer involved in the expedition, Arthur Stanley Eddington, was so sure beforehand that the results would vindicate Einstein’s theory that, for unjustifiable reasons, he threw out some of the data which did not agree with his preconceptions. This story, that there was something scientifically fishy about one of the most famous examples of an experimentum crucis in the history of science, has now become well known, both amongst scientists and laypeople interested in science. -
Procedura Di Valutazione Comparativa Per La Stipula Di N
PROCEDURA DI VALUTAZIONE COMPARATIVA PER LA STIPULA DI N. 1 CONTRATTI DI LAVORO SUBORDINATO PER RICERCATORE A TEMPO DETERMINATO, AI SENSI DELL’ART. 24, COMMA 3, LETT. B) DELLA LEGGE N. 240 DEL 30 DICEMBRE 2010 PER IL S.C. 02/A2 PROFILO RICHIESTO S.S.D. FIS/02 — FISICA TEORICA MODELLI E METODI MATEMATICI — DIPARTIMENTO DI SCIENZE MATEMATICHE E INFORMATICHE, SCIENZE FISICHE E SCIENZE DELLA TERRA DELLA UNIVERSITÀ DEGLI STUDI DI MESSINA VERBALE N. 2 (Valutazione preliminare dei candidati e ammissione alla discussione pubblica) L’anno 2021 il giorno 9 del mese di Marzo alle ore 9:00 si riunisce al completo, per via telematica, ognuno nella propria sede universitaria, come previsto dall’art. 9 comma 8 del Regolamento d’Ateneo, la Commissione giudicatrice, della valutazione comparativa in epigrafe, nominata con D.R. prot. n. 6602 del 19 gennaio 2021, pubblicato sul sito internet dell’Università di Messina, per procedere alla valutazione dei titoli, dei curricola e della produzione scientiGica dei candidati. Sono presenti i sotto elencati commissari: Prof. Antonio Davide POLOSA Università degli Studi di Roma, `La Sapienza’ (Presidente) Prof. Giovanni DE LELLIS Università degli Studi di Napoli `Federico II’ (Componente) Prof. Massimo MASERA Università degli Studi di Torino (Segretario) Il presidente della commissione comunica che sono trascorsi i 7 giorni richiesti dalla pubblicazione dei criteri e che la Commissione può leggittimamente proseguire i lavori. I componenti accedono, tramite le proprie credenziali, alla piattaforma informatica https://istanze.unime.it -
Einstein's Conversion from His Static to an Expanding Universe
Eur. Phys. J. H DOI: 10.1140/epjh/e2013-40037-6 THE EUROPEAN PHYSICAL JOURNAL H Einstein’s conversion from his static to an expanding universe Harry Nussbaumera Institute of Astronomy, ETH Zurich, CH-8093 Zurich, Switzerland Received 19 September 2013 / Received in final form 13 November 2013 Published online 4 February 2014 c EDP Sciences, Springer-Verlag 2014 Abstract. In 1917 Einstein initiated modern cosmology by postulating, based on general relativity, a homogenous, static, spatially curved uni- verse. To counteract gravitational contraction he introduced the cos- mological constant. In 1922 Alexander Friedman showed that Albert Einstein’s fundamental equations also allow dynamical worlds, and in 1927 Georges Lemaˆıtre, backed by observational evidence, con- cluded that our universe was expanding. Einstein impetuously rejected Friedman’s as well as Lemaˆıtre’s findings. However, in 1931 he retracted his former static model in favour of a dynamic solution. This investiga- tion follows Einstein on his hesitating path from a static to the expand- ing universe. Contrary to an often advocated belief the primary motive for his switch was not observational evidence, but the realisation that his static model was unstable. 1 Introduction It has become a popular belief that Albert Einstein abandoned his static universe when, on a visit to Pasadena in January and February 1931, Edwin Hubble showed him the redshifted nebular spectra and convinced him that the universe was expand- ing, and the cosmological constant was superfluous. “Two months with Hubble were enough to pry him loose from his attachment to the cosmological constant” is just one example of such statements [Topper 2013]. -
Gregory Ashton October 2019
Dr Gregory Ashton October 2019 Address School of Physics & Astronomy, Contact +61 0452053330 Monash University, Email [email protected] Clayton, 3800, VIC, AU Website greg-ashton.physics.monash.edu Personal profile I am an aspiring leader in gravitational wave data analysis and astrophysical inference and have consistently published high impact work across these fields. I am the senior core developer of the second-generation gravitational wave inference package Bilby, which has been selected, amongst many strong alternatives, to be the flagship astrophysical inference code for the LIGO and the Virgo Scientific Collaboration. All future astrophysical discoveries from future gravitational wave detections will be made using Bilby. I am the chair of the international Bilby development team and have extensive experience in software development and deployment. I have been the subject of international news coverage for work published in Nature Astronomy, providing new insights into understanding neutron stars using radio pulsars glitches. I am on the paper writing team for GW190425, the second binary neutron star inspiral observed by LIGO & Virgo. Education 2012-2016 PhD in Mathematics, University of Southampton (GB) and Albert Einstein Institute (Han- nover, DE). Awarded 29th July 2016. 2008-2012 MPhys, 1st class (Hons), University of Southampton (GB). 2006-2008 General Certificate of Education Advanced Level, in Physics, Mathematics, and Music (AAC), Ferndown Upper School Sixth Form (GB). Academic Experience 2018-2021 Assistant Lecturer: 3-year fixed term postdoctoral researcher, School of Physics and Astron- omy, Monash University, (Melbourne, AU). 2016-2018 Wissenshaftler (Scientist): 2-year fixed term postdoctoral researcher, Albert Einstein Insti- tute (Hannover, DE). -
An Alcoholic's Recovery a Dream for Europe Inoculations Withheld
28 November 2008 £1.70 the DISCOVER THE CONTEMPORARYFriend QUAKER WAY An alcoholic’s recovery Inoculations withheld Escape from the bottle Refugees are second class A dream for Europe Kindertransport Looking forward A survivor’s story the Friend INDEPENDENT QUAKER JOURNALISM SINCE 1843 CONTENTS Vol 166 No 48 3-5 News 3 Learning disabilities highlighted in new report 4 European pesticide proposals come under fire 5 Geneva Declaration success 6 A European Dream? Ian Flintoff 7 Comment Judy Kirby and Bob Miller 8-9 Letters 10-11 An anonymous Quaker’s recovery 12-13 Arts 12 A Kindertransport success story Stevie Krayer 13 Small is still beautiful Philip Bryers 14-15 Children, immigration removal centres and inoculations Crystal Dickinson 16 q-eye has been watching TV 17 Friends & Meetings Cover image: Escape from the bottle. Drawn by Cally Gibson (www.callygibson.co.uk) See pages 10-11. Images on this page: Top: David Tennant as Arthur Eddington with Andy Serkis as Albert Einstein from the BBC2 show Einstein and Eddington, broadcast 22 November. Photo courtesy the BBC. See pages 7 and 16. Below: Friends from North Wales and Wirral & Chester Area Meetings at an elders and overseers day at Wrexham Meeting House earlier this month. Thirty-three Friends from across the area were involved. In this photo they are looking at how to greet new members, as part of their theme of creating and maintaining an inclusive worshipping community. Photo: Andrew Backhouse. Subscriptions Editorial UK £72 per year; Hello, I’m Judy Kirby, editor of the Friend. monthly direct debit £6.50; We welcome honest, succinct online only £45 per year. -
Many-Minds Relativity
Many-Minds Relativity Claes Johnson All Rights Reserved 2011 2 Contents I Introduction and Overview 1 1 Main Objective 3 1.1 A Case Study of Mathematical Modeling ............ 3 1.2 Inspiration ............................. 5 1.3 How It Started .......................... 5 1.4 Is Relativity a Physical Theory? ................. 5 1.5 The Role of Coordinate Systems ................. 6 1.6 Is there an Aether? ........................ 8 1.7 Einstein's Assumption vs the SI Standard ........... 9 1.8 Basic Questions .......................... 11 1.9 Confusion and Illusion ...................... 11 2 Many-Minds Relativity 15 2.1 An Apology ............................ 15 2.2 Towards a Unified Field Theory . 16 2.3 Modern Times by Paul Johnson . 19 2.4 One-Mind vs Many-Minds .................... 20 2.5 A Many-Minds Monetary Market . 25 2.6 A Many-Minds Gravitational Market . 26 2.7 Many-Minds Relativity ...................... 26 2.8 Einstein Cartoons ......................... 27 2.9 Einstein Anecdotes ........................ 28 2.10 Can You Question Einstein as Scientist? . 28 3 Perspectives on Relativity 31 3.1 Relativity of Position and Velocity . 31 3.2 Galilean Invariance ........................ 32 3.3 GPS and Special Relativity ................... 34 3 4 CONTENTS 3.4 Relativity in Academics ..................... 35 3.5 The King and Queen of Science . 35 3.6 1983 SI Standard of Time and Length . 36 3.7 Principles of Many-Minds Relativity . 37 3.8 Politics, Science and Agreement on Essentials . 38 3.9 Einstein's Principle of Relativity . 38 3.10 Is Newton's 2nd Law Galilean Invariant? . 39 3.11 Triviality or Absurdity? ..................... 40 3.12 Einstein's Logical Mistake I ................... 42 3.13 Einstein's Logical Mistake II ..................