STROBE-X: X-Ray Timing and Spectroscopy on Dynamical
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Aspects of Black Hole Physics
Aspects of Black Hole Physics Andreas Vigand Pedersen The Niels Bohr Institute Academic Advisor: Niels Obers e-mail: [email protected] Abstract: This project examines some of the exact solutions to Einstein’s theory, the theory of linearized gravity, the Komar definition of mass and angular momentum in general relativity and some aspects of (four dimen- sional) black hole physics. The project assumes familiarity with the basics of general relativity and differential geometry, but is otherwise intended to be self contained. The project was written as a ”self-study project” under the supervision of Niels Obers in the summer of 2008. Contents Contents ..................................... 1 Contents ..................................... 1 Preface and acknowledgement ......................... 2 Units, conventions and notation ........................ 3 1 Stationary solutions to Einstein’s equation ............ 4 1.1 Introduction .............................. 4 1.2 The Schwarzschild solution ...................... 6 1.3 The Reissner-Nordstr¨om solution .................. 18 1.4 The Kerr solution ........................... 24 1.5 The Kerr-Newman solution ..................... 28 2 Mass, charge and angular momentum (stationary spacetimes) 30 2.1 Introduction .............................. 30 2.2 Linearized Gravity .......................... 30 2.3 The weak field approximation .................... 35 2.3.1 The effect of a mass distribution on spacetime ....... 37 2.3.2 The effect of a charged mass distribution on spacetime .. 39 2.3.3 The effect of a rotating mass distribution on spacetime .. 40 2.4 Conserved currents in general relativity ............... 43 2.4.1 Komar integrals ........................ 49 2.5 Energy conditions ........................... 53 3 Black holes ................................ 57 3.1 Introduction .............................. 57 3.2 Event horizons ............................ 57 3.2.1 The no-hair theorem and Hawking’s area theorem .... -
Legal "Black Hole"? Extraterritorial State Action and International Treaty Law on Civil and Political Rights
Michigan Journal of International Law Volume 26 Issue 3 2005 Legal "Black Hole"? Extraterritorial State Action and International Treaty Law on Civil and Political Rights Ralph Wilde University of London Follow this and additional works at: https://repository.law.umich.edu/mjil Part of the Human Rights Law Commons, Military, War, and Peace Commons, and the National Security Law Commons Recommended Citation Ralph Wilde, Legal "Black Hole"? Extraterritorial State Action and International Treaty Law on Civil and Political Rights, 26 MICH. J. INT'L L. 739 (2005). Available at: https://repository.law.umich.edu/mjil/vol26/iss3/1 This Article is brought to you for free and open access by the Michigan Journal of International Law at University of Michigan Law School Scholarship Repository. It has been accepted for inclusion in Michigan Journal of International Law by an authorized editor of University of Michigan Law School Scholarship Repository. For more information, please contact [email protected]. LEGAL "BLACK HOLE"? EXTRATERRITORIAL STATE ACTION AND INTERNATIONAL TREATY LAW ON CIVIL AND POLITICAL RIGHTSt Ralph Wilde* I. INTRODUCTION ......................................................................... 740 II. EXTRATERRITORIAL STATE ACTIVITIES ................................... 741 III. THE NEED FOR GREATER SCRUTINY ........................................ 752 A. Ignoring ExtraterritorialActivity ...................................... 753 B. GreaterRisks of Rights Violations in the ExtraterritorialContext .................................................... -
Arxiv:2007.09714V1 [Gr-Qc] 19 Jul 2020 Tem PSR J0737-3039A/B
Probing Noncommutative Gravity with Gravitational Wave and Binary Pulsar Observations Leah Jenks,1 Kent Yagi,2 and Stephon Alexander1 1Brown Theoretical Physics Center and Department of Physics, Brown University, 182 Hope Street, Providence, Rhode Island, 02903 2Department of Physics, University of Virginia, P.O. Box 400714, Charlottesville, VA 22904-4714, USA (Dated: July 21, 2020) Noncommutative gravity is a natural method of quantizing spacetime by promoting the spacetime coordinates themselves to operators which do not commute. This approach is motivated, for exam- ple, from a quantum gravity perspective, among others. Noncommutative gravity has been tested against the binary black hole merger event GW150914. Here, we extend and improve upon such a previous analysis by (i) relaxing an assumption made on the preferred direction due to noncommuta- tivity, (ii) using posterior samples produced by the LIGO/Virgo Collaborations, (iii) consider other gravitational wave events, namely GW151226, GW170608, GW170814 and GW170817, and (iv) consider binary pulsar observations. Using Kepler's law that contains the noncommutative effect at second post-Newtonian order, we derive corrections to the gravitational waveform phase and the pericenter precession. Using the gravitational wave and double pulsar binary observations, we find bounds on a space-time noncommutative tensor θ0i in terms of the preferred frame direction with respect to the orientation of each binary. We find that the gravitational wave bounds are stronger than the binary pulsar one by an order of magnitude and the noncommutative tensor normalized by the Planck length and time is constrained to be of order unity. I. INTRODUCTION of noncommutative gravity stems from these theories. -
Mapping Prostitution: Sex, Space, Taxonomy in the Fin- De-Siècle French Novel
Mapping Prostitution: Sex, Space, Taxonomy in the Fin- de-Siècle French Novel The Harvard community has made this article openly available. Please share how this access benefits you. Your story matters Citation Tanner, Jessica Leigh. 2013. Mapping Prostitution: Sex, Space, Taxonomy in the Fin-de-Siècle French Novel. Doctoral dissertation, Harvard University. Citable link http://nrs.harvard.edu/urn-3:HUL.InstRepos:10947429 Terms of Use This article was downloaded from Harvard University’s DASH repository, WARNING: This file should NOT have been available for downloading from Harvard University’s DASH repository. Mapping Prostitution: Sex, Space, Taxonomy in the Fin-de-siècle French Novel A dissertation presented by Jessica Leigh Tanner to The Department of Romance Languages and Literatures in partial fulfillment of the requirements for the degree of Doctor of Philosophy in the subject of Romance Languages and Literatures Harvard University Cambridge, Massachusetts May 2013 © 2013 – Jessica Leigh Tanner All rights reserved. Dissertation Advisor: Professor Janet Beizer Jessica Leigh Tanner Mapping Prostitution: Sex, Space, Taxonomy in the Fin-de-siècle French Novel Abstract This dissertation examines representations of prostitution in male-authored French novels from the later nineteenth century. It proposes that prostitution has a map, and that realist and naturalist authors appropriate this cartography in the Second Empire and early Third Republic to make sense of a shifting and overhauled Paris perceived to resist mimetic literary inscription. Though always significant in realist and naturalist narrative, space is uniquely complicit in the novel of prostitution due to the contemporary policy of reglementarism, whose primary instrument was the mise en carte: an official registration that subjected prostitutes to moral and hygienic surveillance, but also “put them on the map,” classifying them according to their space of practice (such as the brothel or the boulevard). -
Supernova Physics with Gravitational Waves: Newborn Black Holes Are “Kicked”
Supernova physics with gravitational waves: Newborn black holes are “kicked” Richard O’Shaughnessy [email protected] 614 906 9649 Davide Gerosa [email protected] 626 395 6829 Daniel Wysocki [email protected] ! ! Accepted for publication in Physical Review Letters Poster 317.07 [see iPoster] June 5, AAS 2 3 GW151226: Gravitational waves from a black hole binary B. P.• ABBOTTGW151226et al. is the second, less massive binary black hole confidently detectedPHYS. by REV. LIGO X 6, 041015 (2016) GW151226 Abbott et al, PRX 6, 041015 (2016) ; PRL 118 221101 (2017) FIG. 4. Posterior probability densities of the masses, spins, and distance to the three events GW150914, LVT151012, and GW151226. source For the two-dimensional distributions, the contours show 50% and 90% credible regions. Top left panel: Component masses m1 and source source source m2 for the three events. We use the convention that m1 ≥ m2 , which produces the sharp cut in the two-dimensional source 0.3 distribution. For GW151226 and LVT151012, the contours follow lines of constant chirp mass (M 8.9−þ0.3 M and source 1.4 ¼ ⊙ M 15:1−þ1.1 M , respectively). In all three cases, both masses are consistent with being black holes. Top right panel: The mass and¼ dimensionless⊙ spin magnitude of the final black holes. Bottom left panel: The effective spin and mass ratios of the binary components. Bottom right panel: The luminosity distance to the three events. following section and are consistent with our expect- closely mirror the original analysis of GW150914, as ations for an astrophysical BBH source. -
An Annotated List of Fantasy Novels Incorporating Tarot (1990-2005)
Volume 38 Number 2 Article 12 5-15-2020 An Annotated List of Fantasy Novels Incorporating Tarot (1990-2005) Emily E. Auger Independent Scholar Follow this and additional works at: https://dc.swosu.edu/mythlore Part of the Children's and Young Adult Literature Commons Recommended Citation Auger, Emily E. (2020) "An Annotated List of Fantasy Novels Incorporating Tarot (1990-2005)," Mythlore: A Journal of J.R.R. Tolkien, C.S. Lewis, Charles Williams, and Mythopoeic Literature: Vol. 38 : No. 2 , Article 12. Available at: https://dc.swosu.edu/mythlore/vol38/iss2/12 This Notes and Letters is brought to you for free and open access by the Mythopoeic Society at SWOSU Digital Commons. It has been accepted for inclusion in Mythlore: A Journal of J.R.R. Tolkien, C.S. Lewis, Charles Williams, and Mythopoeic Literature by an authorized editor of SWOSU Digital Commons. An ADA compliant document is available upon request. For more information, please contact [email protected]. To join the Mythopoeic Society go to: http://www.mythsoc.org/join.htm Mythcon 51: A VIRTUAL “HALFLING” MYTHCON July 31 - August 1, 2021 (Saturday and Sunday) http://www.mythsoc.org/mythcon/mythcon-51.htm Mythcon 52: The Mythic, the Fantastic, and the Alien Albuquerque, New Mexico; July 29 - August 1, 2022 http://www.mythsoc.org/mythcon/mythcon-52.htm Abstract This annotated list of books from 1990 through 2005 continues the bibliography in Mythlore 36.2 (Spring- Summer 2018) and includes abstracts for each novel or series and some card layout diagrams. Additional Keywords Fantasy literature—Bibliography; Tarot in literature This notes and letters is available in Mythlore: A Journal of J.R.R. -
Y A-T-Il Encore De La Place En Bas ? Le Paysage Contemporain Des Nanosciences Et Des Nanotechnologies
Philosophia Scientiæ Travaux d'histoire et de philosophie des sciences 23-1 | 2019 Y a-t-il encore de la place en bas ? Le paysage contemporain des nanosciences et des nanotechnologies Jonathan Simon et Bernadette Bensaude-Vincent (dir.) Édition électronique URL : http://journals.openedition.org/philosophiascientiae/1693 DOI : 10.4000/philosophiascientiae.1693 ISSN : 1775-4283 Éditeur Éditions Kimé Édition imprimée Date de publication : 18 février 2019 ISSN : 1281-2463 Référence électronique Jonathan Simon et Bernadette Bensaude-Vincent (dir.), Philosophia Scientiæ, 23-1 | 2019, « Y a-t-il encore de la place en bas ? » [En ligne], mis en ligne le 01 janvier 2021, consulté le 30 mars 2021. URL : http://journals.openedition.org/philosophiascientiae/1693 ; DOI : https://doi.org/10.4000/ philosophiascientiae.1693 Tous droits réservés Y a-t-il encore de la place en bas ? Le paysage contemporain des nanosciences et des nanotechnologies Introduction. Nanotechnoscience: The End of the Beginning Bernadette Bensaude-Vincent Université Paris 1 Panthéon-Sorbonne (France) Jonathan Simon Archives Henri-Poincaré – Philosophie et Recherches sur les Sciences et les Technologies (AHP-PReST), Université de Lorraine, Université de Strasbourg, CNRS, Nancy (France) Is there still room at the bottom? The question providing the theme for the present issue of Philosophia Scientiæ is, of course, adapted from Richard Feynman’s well-known speech at the 1959 meeting of the American Physical Society. On this occasion he attracted physicists’ attention to the vast potential of working at the scale of the nanometre if not the ångström, using the catchy title: “Plenty of Room at the Bottom” [Feynman 1959]. This hookline from a famous Nobel laureate physicist served as a motto for the emerging field of nanoscience and nanotechnology (which we will here abbreviate to nanoresearch) in the early 2000s. -
On the Hunt for Excited States
INTERNATIONAL JOURNAL OF HIGH-ENERGY PHYSICS CERN COURIER VOLUME 45 NUMBER 10 DECEMBER 2005 On the hunt for excited states HOMESTAKE DARK MATTER SNOWMASS Future assured for Galactic gamma rays US workshop gets underground lab p5 may hold the key p 17 ready for the ILC p24 www.vectorfields.comi Music to your ears 2D & 3D electromagnetic modellinj If you're aiming for design excellence, demanding models. As a result millions you'll be pleased to hear that OPERA, of elements can be solved in minutes, the industry standard for electromagnetic leaving you to focus on creating modelling, gives you the most powerful outstanding designs. Electron trajectories through a TEM tools for engineering and scientific focussing stack analysis. Fast, accurate model analysis • Actuators and sensors - including Designed for parameterisation and position and NDT customisation, OPERA is incredibly easy • Magnets - ppm accuracy using TOSCA to use and has an extensive toolset, making • Electron devices - space charge analysis it ideal for a wide range of applications. including emission models What's more, its high performance analysis • RF Cavities - eigen modes and single modules work at exceptional levels of speed, frequency response accuracy and stability, even with the most • Motors - dynamic analysis including motion Don't take our word for it - order your free trial and check out OPERA yourself. B-field in a PMDC motor Vector Fields Ltd Culham Science Centre, Abingdon, Oxon, 0X14 3ED, U.K. Tel: +44 (0)1865 370151 Fax: +44 (0)1865 370277 Email: [email protected] Vector Fields Inc 1700 North Famsworth Avenue, Aurora, IL, 60505. -
First Circular
First Circular With great pleasure we announce the first circular for the international confer- ence The Structure and Signals of Neutron Stars, from Birth to Death, to be held in Florence, Italy from March 24-28, 2014. The conference is affili- ated with a six week workshop of the same title to be held at the Galileo Galilei Institute, also in Florence, from March 10-April 18, 2014. The study of neutron stars represents an active field of both observational and theoretical research, requiring the expertise of scientists across a range of disciplines, including astrophysics, nuclear and particle physics and Gravitational Wave (GW) physics. A conference dedicated to all facets of neutron stars is particularly relevant at this moment, given recent advances such as • The discovery of massive neutron stars, which has placed new constraints on the equation of state (EoS) of dense matter. • Observations of cooling of the young NS in Cas A, hinting at a transition to neutron superfluidity. • Gravitational wave interferometers LIGO and Virgo being upgraded to ad- vanced sensitivity, and starting to take data as soon as 2015. • New observations challenging models for Gamma Ray Bursts and their cen- tral engines. New observations of core collapse supernovae, showing an un- expected diversity in their explosion mechanisms. • New lab experiments testing matter at high density and temperature that will start taking data in 2015 (NICA - Dubna). • The discovery of a magnetar near the Galactic center. This conference aims to bring together astronomers from across the electro- magnetic and GW spectrum who are interested in observations that can constrain the neutron star EoS, as well as nuclear physicists interested in the behavior of matter at high densities. -
West Copper River Delta Landscape Assessment Cordova Ranger District Chugach National Forest 03/18/2003 Updated 04/19/2007
West Copper River Delta Landscape Assessment Cordova Ranger District Chugach National Forest 03/18/2003 updated 04/19/2007 Copper River Delta – circa 1932 – photo courtesy of Perry Davis Team: Susan Kesti - Team Leader, writer-editor, vegetation Milo Burcham – Wildlife resources, Subsistence Bruce Campbell – Lands, Special Uses Dean Davidson – Soils, Geology Rob DeVelice – Succession, Ecology Carol Huber – Minerals, Geology, Mining Tim Joyce – Fish subsistence Dirk Lang – Fisheries Bill MacFarlane – Hydrology, Water Quality Dixon Sherman – Recreation Linda Yarborough – Heritage Resources Table of Contents Executive Summary...........................................................................................vi Chapter 1 – Introduction ....................................................................................1 Purpose.............................................................................................................1 The Analysis Area .............................................................................................1 Legislative History .............................................................................................3 Relationship to the revised Chugach Land and Resource Management Plan...4 Chapter 2 – Analysis Area Description .............................................................7 Physical Characteristics ....................................................................................7 Location .........................................................................................................7 -
MY SO October Showdown Rules
S P A C E - O C T O B E R 2 0 2 0 MY SO STEM SHOWDOWN C O N T E N T , R E C O M M E N D E D M A T E R I A L S & S C O R I N G STEM SHOWDOWN CONTENT The STEM Showdown will consist of a series of online multiple-choice questions. Middle school (Grade 6-9) participant questions will center around the properties and evolution of stars and galaxies as well as their observation using different portions of the electromagnetic spectrum (e.g., Radio, Infrared, Visible, Ultraviolet, X-Ray, Gamma Ray). While high school (Grades 9-12) participants will focus on Star and Galaxy Formation and Evolution. A Showdown participant will have 55- minutes to answer as many questions as possible. The middle school (Grades 6-9) content and skills covered by the Showdown this month is as follows: 1.Stellar and galactic evolution 2.Spectral classification of stars 3.Hubble classification of galaxies 4.Observation using multiple portions of the electromagnetic spectrum 5.The relationship between stellar temperature, radius, and luminosity 6.Magnitude and luminosity scales, distance modulus, inverse square law 7.Identification of the stars, constellations, and deep sky objects included in the list below as they appear on star charts, H-R diagrams, portable star labs, photos, or planetariums. Note: Constellations are underlined; Stars are boldface; Deep Sky Objects are italicized. a.Andromeda: M31 (Andromeda Galaxy) b.Aquila: Altair c.Auriga: Capella d.Bootes: Arcturus e.Cancer: DLA0817g f.Canis Major: Sirius g.Canis Minor: Procyon h.Centaurus: NGC5128 i.Coma Berenices: NGC4676, NGC4555 j.Corvus: NGC4038/NGC4039 k.Crux: Dragonfish Nebula l.Cygnus: Deneb m.Dorado: 30 Doradus, LMC n.Gemini: Castor, Pollux o.Lyra: Vega p.Ophiuchus: Zeta Ophiuchi, Rho Ophiuchi cloud complex q.Orion: Betelgeuse, Rigel & M42 (Orion Nebula) r.Perseus: Algol, NGC1333 Science Olympiad, Inc. -
Dense Matter with Extp Arxiv
UvA-DARE (Digital Academic Repository) Dense matter with eXTP Watts, A.L.; Riley, T.E.; Degenaar, N.; Di Salvo, T.; Homan, J.; Stappers, B.; eXTP Mission DOI 10.1007/s11433-017-9188-4 Publication date 2019 Document Version Submitted manuscript Published in Science China: Physics, Mechanics and Astronomy Link to publication Citation for published version (APA): Watts, A. L., Riley, T. E., Degenaar, N., Di Salvo, T., Homan, J., Stappers, B., & eXTP Mission (2019). Dense matter with eXTP. Science China: Physics, Mechanics and Astronomy, 62(2), [29503]. https://doi.org/10.1007/s11433-017-9188-4 General rights It is not permitted to download or to forward/distribute the text or part of it without the consent of the author(s) and/or copyright holder(s), other than for strictly personal, individual use, unless the work is under an open content license (like Creative Commons). Disclaimer/Complaints regulations If you believe that digital publication of certain material infringes any of your rights or (privacy) interests, please let the Library know, stating your reasons. In case of a legitimate complaint, the Library will make the material inaccessible and/or remove it from the website. Please Ask the Library: https://uba.uva.nl/en/contact, or a letter to: Library of the University of Amsterdam, Secretariat, Singel 425, 1012 WP Amsterdam, The Netherlands. You will be contacted as soon as possible. UvA-DARE is a service provided by the library of the University of Amsterdam (https://dare.uva.nl) Download date:05 Oct 2021 Watts A L, Yu W, Poutanen J, Zhang S, etSCIENCE al Sci.