Academic literature on the topic 'Black hole structure'
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Journal articles on the topic "Black hole structure"
Kumar, Jitendra, Shafqat Ul Islam, and Sushant G. Ghosh. "Loop Quantum Gravity motivated multihorizon rotating black holes." Journal of Cosmology and Astroparticle Physics 2022, no. 11 (November 1, 2022): 032. http://dx.doi.org/10.1088/1475-7516/2022/11/032.
Full textGhosh, P. "The structure of black hole magnetospheres -- I. Schwarzschild black holes." Monthly Notices of the Royal Astronomical Society 315, no. 1 (June 11, 2000): 89–97. http://dx.doi.org/10.1046/j.1365-8711.2000.03410.x.
Full textMahulikar, Shripad P., and Pallavi Rastogi. "Study of black hole as dissipative structure using negentropy." Canadian Journal of Physics 94, no. 10 (October 2016): 960–66. http://dx.doi.org/10.1139/cjp-2016-0388.
Full textCHAKRABARTI, SAYAN K., KUMAR S. GUPTA, and SIDDHARTHA SEN. "UNIVERSAL NEAR-HORIZON CONFORMAL STRUCTURE AND BLACK HOLE ENTROPY." International Journal of Modern Physics A 23, no. 16n17 (July 10, 2008): 2547–61. http://dx.doi.org/10.1142/s0217751x08040482.
Full textNagatani, Yukinori. "Atomic Structure in Black Hole." Progress of Theoretical Physics Supplement 164 (2006): 54–67. http://dx.doi.org/10.1143/ptps.164.54.
Full textDeng, Gao-Ming, and Yong-Chang Huang. "Q − Φ criticality and microstructure of charged AdS black holes in f(R) gravity." International Journal of Modern Physics A 32, no. 35 (December 20, 2017): 1750204. http://dx.doi.org/10.1142/s0217751x17502049.
Full textGao, Shengyao, Zhou Tao, Yuhui Li, and Fuzhen Pang. "Application research of acoustic black hole in floating raft vibration isolation system." REVIEWS ON ADVANCED MATERIALS SCIENCE 61, no. 1 (January 1, 2022): 888–900. http://dx.doi.org/10.1515/rams-2022-0235.
Full textTang, Yang, Jiangtao Liu, Ning Liu, Fuzhen Pang, and Yu Wang. "Dynamic characteristic analysis of acoustic black hole in typical raft structure." REVIEWS ON ADVANCED MATERIALS SCIENCE 61, no. 1 (January 1, 2022): 458–76. http://dx.doi.org/10.1515/rams-2022-0038.
Full textShibata, K., S. Koide, T. Kudoh, and S. Aoki. "Jets from Black Hole Magnetospheres." Symposium - International Astronomical Union 195 (2000): 265–72. http://dx.doi.org/10.1017/s0074180900163028.
Full textHONG, SUNGWOOK E., DONG-HAN YEOM, and HEESEUNG ZOE. "CRITICAL REVIEWS ON HOLOGRAPHIC MEASURE OVER THE MULTIVERSE." International Journal of Modern Physics: Conference Series 01 (January 2011): 317–22. http://dx.doi.org/10.1142/s2010194511000468.
Full textDissertations / Theses on the topic "Black hole structure"
Riedel, Gårding Elias. "Quantum structure of holographic black holes." Thesis, KTH, Fysik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-284694.
Full textVi studerar ett fritt skalärt kvantfält i BTZ-rumtiden som en modell av AdS/CFT-dualiteten för svarta hål och visar huvudstegen i beräkningen av Bogolyubov-koefficienter mellan moder på olika sidor av maskhålet. Som bakgrund redogör vi för BTZ-geometrin i standard-, Kruskal- och Poincarékoordinater, holografisk renormering av den duala fältteorin och kanonisk kvantisering i krökt rumtid.
Ryle, Wesley Thomas. "Investigation of Fundamental Black Hole Properties of AGN through Optical Variability." Digital Archive @ GSU, 2008. http://digitalarchive.gsu.edu/phy_astr_diss/25.
Full textBellisardi, Federico. "Study of gaseous structures in axisymmetric rotation in presence of a black hole." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2019. http://amslaurea.unibo.it/18422/.
Full textLee, Chih Yun. "Funding the Black Hole: The Ineffectiveness of the Current Retirement Plan Structure and Future Solutions." Scholarship @ Claremont, 2013. http://scholarship.claremont.edu/cmc_theses/629.
Full textLeng, Julien. "Controlling flexural waves using subwavelength perfect absorbers : application to Acoustic Black Holes." Thesis, Le Mans, 2019. http://www.theses.fr/2019LEMA1027/document.
Full textThe vibration control adapted to light structures is a scientific and technological challenge due toincreasingly stringent economic and ecological standards. Meanwhile, recent studies in audible acoustics havefocused on broadband wave absorption at low frequencies by means of subwavelength perfect absorbers. Suchmetamaterials can totally absorb the energy of an incident wave. The generalisation of this method for applicationsin elastodynamics could be of great interest for the vibration control of light structures.This thesis aims at adapting the perfect absorption problem for flexural waves in 1D and 2D systems with localresonators using the critical coupling condition. A study of 1D systems with simple geometries is first proposed. Thisprovides methods to design simple resonators for an effective absorption of flexural waves. The 1D systems thenbecome more complex by studying the critical coupling of 1D Acoustic Black Holes (ABH). The ABH effect is theninterpreted using the concept of critical coupling, and key features for future optimisation procedures of ABHs arepresented. The critical coupling condition is then extended to 2D systems. The perfect absorption by the firstaxisymmetric mode of a circular resonator inserted in a thin plate is analysed. Multiple scattering by an array ofcircular resonators inserted in an infinite or semi-infinite 2D thin plate, called metaplate, is also considered to getclose to practical applications. Through this thesis, analytical models, numerical simulations and experiments areshown to validate the physical behaviour of the systems presented
Cochet, Some Claire. "Numerical characterization of boson stars and Kerr Black holes." Sorbonne Paris Cité, 2016. http://www.theses.fr/2016USPCC094.
Full textThe Galactic Center is an interesting place to test possible effects of strong gravity regime. Whereas it is generally believed that the compact object located at the Galactic Center, named Sgr A*, is a rotating black hole, some alternative models can also explain the current observations. This work is centered on one of these other objects, which is the Boson Star. Rotating boson stars are numerical solutions of the coupled Einstein-Klein-Gordon system, so these equations are written within the 3+1 formalism and then a numerical code capable of solving them with the Kadath library has been developed. Several kinds of boson stars with different potentials are presented : free fields an self-interacting fields, with quartic and sextic potentials, and different values of the rotational quantum number. Then two different ways of comparing this spacetime to Kerr's are presented. One way was to compute timelike geodesics in this geometry and study them. For that the ray-tracing code Gyoto is used to integrate numerically the geodesic equations for several types of boson stars. A peculiar type of orbits has been identifyed: the zero-angular-momentum ones which is called pointy-petal orbits thanks to their shape. These orbits pass very close to the center and are qualitatively different from orbits around a Kerr black hole. Another way to compare Kerr to any stationary and asymptotically flat metric given in its 3+1 form was to us a the characterization of the Kerr spacetime given by the Simon-Mars tensor. This tensor has the property of being identically zero for a vacuum and asymptotically flat spacetime if and only if the latter is locally isometric to the Kerr spacetime. The idea was to build a scalar with this tensor, and a scalar which is an invariant quality factor. Then, write it in 3+1 form to be able to compute it with numerical codes such as Kadath. Computing this scalar provides a simple way of comparing locally a generic (even non vacuum and non analytic) stationary spacetime to Kerr, therefore measure its 'non-Kerness". As an illustration, this invariant quality factor is evaluated for numerical solutions of the Einstein equations generated by boson stars and neutron stars, and for analytic solutions of the Einstein equations such as Curzon Chazy spacetime
Bowyer, E. P. "Experimental investigation of damping structural vibrations using the acoustic black hole effect." Thesis, Loughborough University, 2012. https://dspace.lboro.ac.uk/2134/10983.
Full textBergstedt, Viktor. "Spacetime as a Hamiltonian Orbit and Geroch's Theorem on the Existence of Fermions." Thesis, Uppsala universitet, Institutionen för fysik och astronomi, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-432488.
Full textAllmän relativitetsteori har i över hundra år legat i teoretiska fysikens framkant. Det är möjligt att lösningarna på öppna problem som kvantiseringen av gravitation går att finna i en utvidgning av allmän relativitetsteori – och kanske uppenbarar sig denna utvidgning bara ur en alternativ formulering av teorin. I den här uppsatsen formuleras allmän relativitetsteori och dess Einsteinekvationer som ett begynnelsevärdesproblem, genom vilket rumtiden kan betraktas som rummets historia. Vi visar att rummets rörelseekvationer är Hamiltons ekvationer med tvångsvillkor. Enligt partikelfysiken bör fermioner kunna finnas till i rumtiden. Härom kan vi åberopa Gerochs sats, enligt vilken rumtider som har en Hamiltonsk formulering också medger fermioner. Vi redogör för huvuddragen i beviset av Gerochs sats.
Kawamuro, Taiki. "X-ray Studies on Nucleus Structures of Mass Accreting Supermassive Black Holes and Luminosity Function of Tidal Disruption Events." 京都大学 (Kyoto University), 2017. http://hdl.handle.net/2433/225404.
Full textDeng, Jie. "Vibroacoustic modeling of acoustic blackhole applications in flat, curved andcomplex mechanical structures." Doctoral thesis, Universitat Ramon Llull, 2020. http://hdl.handle.net/10803/670666.
Full textLos agujeros negros acústicos en mecánica (conocidos por las siglas ABHs, del inglés Acoustic Black Holes) suelen estar formados por muescas en vigas y placas, el grueso de las cuales decae según una ley potencial. El efecto del ABH es el de ralentizar las velocidades de fase y de grupo de las ondas de flexión incidentes de tal modo que, en teoría, haría falta un tiempo infinito para que las ondas alcanzaran el centro del ABH, si el grueso de este último fuera exactamente cero. Sin embargo, en la práctica esto no es posible, aunque se puede conseguir una fuerte disipación colocando una capa de material amortiguador en el centro del ABH, donde se concentra la mayor parte de la energía de las ondas. En los últimos años, los ABHs no sólo se han explotado como método pasivo para reducir vibraciones estructurales y la consecuente emisión de ruido, sino que también se ha explorado su potencial para otras aplicaciones como la manipulación de ondas o la captación de energía. Esta tesis tiene tres objetivos principales. Así pues, tras una introducción general a los ABHs, el trabajo se ha dividido en tres grandes secciones. La primera aborda aplicaciones de los ABHs en vigas rectas y placas planas. Para empezar, se propone y analiza un voladizo piezoeléctrico con un acabado de ABH para capturar energía. A continuación, se presentan ABHs en forma de anillo para aislar puntos de excitación externos en placas planas y así evitar la transmisión de vibraciones. Finalmente, se contemplan configuraciones periódicas de matrices de ABHs para colimar haces de ondas de flexión y concentrar su energía en zonas predeterminadas de una placa. La segunda parte de la tesis propone nuevos diseños de ABHs para estructuras con curvatura. Estas son muy habituales en los sectores naval, aeronáutico e industrial, por lo que merece la pena investigar si los ABH pueden dar buenos resultados en algunos casos. La sección comienza analizando la inclusión de ABHs en vigas circulares y se ve como estos dan pie a la aparición de fenómenos típicos de sistemas periódicos. Seguidamente se propone un ABH anular para reducir las vibraciones en conductos cilíndricos. En concreto, se tratan los casos de un conducto simplemente soportado con un ABH anular, y el de un conducto con ABH, soportes periódicos y rigidificadores. Para finalizar la sección, se investigan los efectos de los ABH anulares en la radiación acústica del conducto teniendo en cuenta el nivel de potencia acústica, la eficiencia de radiación y la intensidad supersónica. La tercera parte de la tesis es más corta que las anteriores y simula el aislamiento de una placa con múltiples ABHs, en el rango de media y alta frecuencia. A tal efecto se emplea el método del análisis estadístico de distribución modal de energía (SmEdA: statistical modal energy distribution analysis). En esta sección, la estructura con ABHs ya no se analiza como un elemento individual, sino que se acopla a dos cavidades de aire formando parte de un sistema mecánico más complejo. A lo largo de la tesis se utiliza repetidamente el método de expansión gaussiana (GEM: Gaussian expansión method). Por GEM entendemos tomar funciones gaussianas como base para resolver ecuaciones diferenciales en derivadas parciales en el marco del método de Rayleigh-Ritz. El GEM se parece mucho a los enfoques de ondículas, pero ofrece algunas ventajas en el caso de condiciones de contorno periódicas. Al principio de la tesis se expone un breve repaso del GEM y, cuando es necesario, se aborda su reformulación para un problema particular en el capítulo correspondiente.
Acoustic black holes (ABHs) in mechanics usually consist of geometrical indentations on beams and plates having a power-law decreasing thickness profile. An ABH slows down the phase and group velocity of incident flexural waves in such a way that, ideally, it would take an infinite amount of time for them to reach the ABH center, if the latter had an exact zero thickness. Though this is not possible in practice, strong wave dissipation can be achieved by placing a damping layer at the central region of the ABH, where most vibration energy concentrates. In recent years, ABHs have been not only exploited as a passive means for structural vibration and noise reduction, but its potential for other applications like wave manipulation or energy harvesting have been also explored. The objective of this thesis is threefold. Therefore, after an initial overview the work is divided into three main parts. The first one deals with ABH applications on straight beams and flat plates. To start with, an ABH piezoelectric bimorph cantilever for energy harvesting is proposed and analyzed. Then, ring-shaped ABH indentations are suggested as a means of isolating external excitation points in flat plates and prevent vibration transmission. Finally, periodic ABH array configurations are contemplated to collimate flexural wave beams and focus energy at desired plate locations. The second part of the thesis proposes new ABH designs for curved structures. The latter are very common in the naval, aeronautical and industrial sectors so it is worth investigating if ABHs could function for them. The section starts analyzing the embedding of ABHs on circular beams and how this results in the appearance of typical phenomena of periodic systems. After that, an annular ABH is proposed to reduce vibrations in cylindrical shells. The cases of a simply supported shell with an annular ABH indentation and of a periodic simply supported ABH shell with stiffeners are considered. To finish the section, the effects of annular ABHs on sound radiation are investigated in terms of sound power level, radiation efficiency and supersonic intensity. The third part of the thesis is shorter than the previous ones and is devoted to analyzing the transmission loss of a plate with multiple ABH indentations, in the mid-high frequency range. Statistical modal energy distribution analysis is used for that purpose. Here, the ABH plate is not taken as an individual structure but coupled to two air cavities, thus being part of a more complex mechanical system. Throughout the thesis repeated use is made of the Gaussian expansion method (GEM). The GEM refers to taking Gaussian functions as the basis for solving partial differential equations in the framework of the Rayleigh-Ritz method. The GEM closely resembles wavelet approaches but offers some advantages in the case of periodic boundary conditions. A brief overview of the GEM is exposed at the beginning of the thesis and, when necessary, its reformulation for a particular problem is tackled in its corresponding chapter.
Books on the topic "Black hole structure"
Herbert, Gilbert. Speculations on a black hole: Adler & Sullivan, and the planning of the Chicago Auditorium Building. Haifa: Architectural Heritage Research Centre, Technion, 1998.
Find full text1941-, King Jonathan, and Annual Reviews inc, eds. Protein and nucleic acid structure and dynamics. Menlo Park, Calif: Benjamin/Cummings Pub. Co., 1985.
Find full textCarter, Janet M. Selected data for wells and test holes used in structure-contour maps of the Inyan Kara Group, Minnekahta Limestone, Minnelusa Formation, Madison Limestone, and Deadwood Formation in the Black Hills area, South Dakota. Rapid City, S.D: U.S. Dept. of the Interior, U.S. Geological Survey, 1999.
Find full textA, Berezin V., Rubakov V. A, and Semikoz D. V, eds. Quantum gravity: Proceedings of the sixth Moscow seminar : Moscow, Russia, June 12-19, 1995. Singapore: World Scientific, 1998.
Find full textP, Minicozzi William, ed. A course in minimal surfaces. Providence, R.I: American Mathematical Society, 2011.
Find full textChruściel, Piotr T. Geometry of Black Holes. Oxford University Press, 2020. http://dx.doi.org/10.1093/oso/9780198855415.001.0001.
Full text(Editor), Claudio Teiteboim, and Jorge Zanelli (Editor), eds. Black Holes and the Structure of the Universe. World Scientific Publishing Company, 2000.
Find full textTeitelboim, Claudio, and Jorge Zanelli. Black Holes and the Structure of the Universe. WORLD SCIENTIFIC, 2000. http://dx.doi.org/10.1142/4388.
Full textMee, Nicholas. The Cosmic Mystery Tour. Oxford University Press, 2019. http://dx.doi.org/10.1093/oso/9780198831860.001.0001.
Full textDay, C. Radiation from Black Holes, Future Missions to Primitive Bodies and Middle Atmospheric Fine Structures (Advances in Space Research). Elsevier Science Ltd, 1997.
Find full textBook chapters on the topic "Black hole structure"
Sakellariadou, Maria. "Black Hole Formation from Loops of Cosmic Strings." In The Origin of Structure in the Universe, 175–85. Dordrecht: Springer Netherlands, 1993. http://dx.doi.org/10.1007/978-94-011-1705-0_13.
Full textDray, Tevian. "Matter at the Horizon of the Schwarzschild Black Hole." In Topological Properties and Global Structure of Space-Time, 73–76. Boston, MA: Springer US, 1986. http://dx.doi.org/10.1007/978-1-4899-3626-4_7.
Full textYokosawa, M., and S. Fukazawa. "General Relativistic Magnetohydrodynamic Structure Around a Rotating Black Hole." In Numerical Astrophysics, 223–24. Dordrecht: Springer Netherlands, 1999. http://dx.doi.org/10.1007/978-94-011-4780-4_71.
Full textKazanas, Demosthenes. "X-Ray Binary Phenomenology and Their Accretion Disk Structure." In The Formation and Disruption of Black Hole Jets, 207–25. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-10356-3_8.
Full textSussman, Roberto A. "A Simple Model of a Non-Asymptotically Flat Schwarzschild Black Hole." In Topological Properties and Global Structure of Space-Time, 271–82. Boston, MA: Springer US, 1986. http://dx.doi.org/10.1007/978-1-4899-3626-4_20.
Full textAhmed Rizwan, C. L., A. Naveena Kumar, and K. S. Ananthram. "Effect of Global Monopole on the Microscopic Structure of RN-AdS Black Hole." In Springer Proceedings in Physics, 81–85. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-6292-1_10.
Full textKapoor, Ramesh Chander. "Effect of Dynamical Friction on the Escape of a Supermassive Black Hole Ejected from the Center of a Galaxy." In Structure and Evolution of Active Galactic Nuclei, 573–77. Dordrecht: Springer Netherlands, 1986. http://dx.doi.org/10.1007/978-94-009-4562-3_52.
Full textWang, D. X. "Effects of the Blandford-Znajek Process on Evolution of Radial Structure of Black Hole Accretion Disks." In Stellar Astrophysics, 243–48. Dordrecht: Springer Netherlands, 2000. http://dx.doi.org/10.1007/978-94-010-0878-5_28.
Full textChruściel, Piotr T. "Black Holes." In The Conformal Structure of Space-Time, 61–102. Berlin, Heidelberg: Springer Berlin Heidelberg, 2002. http://dx.doi.org/10.1007/3-540-45818-2_3.
Full textMarsh, David J. E., and Sebastian Hoof. "Astrophysical Searches and Constraints." In The Search for Ultralight Bosonic Dark Matter, 73–122. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-95852-7_3.
Full textConference papers on the topic "Black hole structure"
BRETÓN, NORA. "HORIZON STRUCTURE OF BORN-INFELD BLACK HOLE." In Proceedings of 2002 International Conference. WORLD SCIENTIFIC, 2006. http://dx.doi.org/10.1142/9789812772732_0008.
Full textVolonteri, Marta. "Supermassive black hole mergers and cosmological structure formation." In LASER INTERFEROMETER SPACE ANTENNA: 6th International LISA Symposium. AIP, 2006. http://dx.doi.org/10.1063/1.2405022.
Full textRannu, Kristina. "Internal structure of Maxwell-Gauss-Bonne black hole." In The XIXth International Workshop on High Energy Physics and Quantum Field Theory. Trieste, Italy: Sissa Medialab, 2011. http://dx.doi.org/10.22323/1.104.0079.
Full textBini, Donato, and Andrea Geralico. "Extended bodies with structure up to the quadrupole in black hole spacetimes." In Proceedings of the MG14 Meeting on General Relativity. WORLD SCIENTIFIC, 2017. http://dx.doi.org/10.1142/9789813226609_0488.
Full textMeier, David L. "Jet power and jet suppression: The role of disk structure and black hole rotation." In RELATIVISTIC ASTROPHYSICS: 20th Texas Symposium. AIP, 2001. http://dx.doi.org/10.1063/1.1419586.
Full textPariev, Vladimir I., and Benjamin C. Bromley. "Line emission from an accretion disk around black hole: effects of the disk structure." In Accretion processes in astrophysical systems: Some like it hot! - eigth astrophysics conference. AIP, 1998. http://dx.doi.org/10.1063/1.55906.
Full textShidatsu, Megumi, Yoshihiro Ueda, Takafumi Hori, Chris Done, and Satoshi Nakahira. "Wide-band X-ray Studies of Inner Disc Structure in Galactic Black Hole Binaries." In Swift: 10 Years of Discovery. Trieste, Italy: Sissa Medialab, 2015. http://dx.doi.org/10.22323/1.233.0162.
Full textBolokhov, S. V., and V. D. Ivashchuk. "Global structure of black hole and brane solutions in a multidimensional model with anisotropic fluid." In Twelfth Asia-Pacific International Conference on Gravitation, Astrophysics, and Cosmology. WORLD SCIENTIFIC, 2016. http://dx.doi.org/10.1142/9789814759816_0070.
Full textHE, Pu, Jun-jie ZHU, Xiao-zhu SUN, Hong-li JI, and Jin-hao QIU. "Energy Focusing Effect Of A Novel Acoustic Black Hole Absorber On Flexural Waves In Box-Type Structure." In 2020 15th Symposium on Piezoelectrcity, Acoustic Waves and Device Applications (SPAWDA). IEEE, 2021. http://dx.doi.org/10.1109/spawda51471.2021.9445429.
Full textCornean, Horia, Sergey Sorokin, and Benjamin Støttrup. "ACOUSTIC BLACK HOLE PROFILE OPTIMIZATION." In XI International Conference on Structural Dynamics. Athens: EASD, 2020. http://dx.doi.org/10.47964/1120.9202.20000.
Full textReports on the topic "Black hole structure"
Liedahl, D., and C. Mauche. Structure and Spectroscopy of Black Hole Accretion Disks. Office of Scientific and Technical Information (OSTI), February 2005. http://dx.doi.org/10.2172/918406.
Full textDeAnna, Dixon, and Hodo Wayne. Finite element analysis of quoin block deterioration and load transfer mechanisms in miter gates : pintle and pintle connections. Engineer Research and Development Center (U.S.), June 2021. http://dx.doi.org/10.21079/11681/40842.
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