Results 1 to 10 of about 709,447 (218)

Quasi-Normal Modes of Stars and Black Holes [PDF]

Living Reviews in Relativity, 1999
Perturbations of stars and black holes have been one of the main topics of relativistic astrophysics for the last few decades. They are of particular importance today, because of their relevance to gravitational wave astronomy.
Kokkotas Kostas, Schmidt Bernd
doaj   +6 more sources

On New Modifications of Some Perturbation Procedures

Discrete Dynamics in Nature and Society, 2021
In this paper, we present new modifications for some perturbation procedures used in mathematics, physics, astronomy, and engineering. These modifications will help us to solve the previous problems in different sciences under new conditions. As problems,
A. I. Ismail
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XXII. An improved solution of a problem in physical astronomy; by which, swiftly converging series are obtained, which are useful in computing the perturbations of the motions of the Earth, Mars, and Venus, by their mutual attraction. To which is added an appendix, containing an easy method of obtaining the sums of many slowly converging series which arise in taking the fluents of binominal surds, &c. In a letter to the Rev. Nevil Maskelyne, D. D. F. R. S. and Astronomer Royal [PDF]

Philosophical Transactions of the Royal Society of London
Reverend Sir, Such is the subject of the inclosed paper, and such the repu­tation for skill and industry, which the many valuable papers you have communicated to the Royal Society, and your other learned works, have justly procured to you, that it could not with more propriety be submitted to the judgment of any other person than yourself,
John Hellins
openalex   +2 more sources

Modification of the Large Parameter Approach for the Periodic Solutions of Nonlinear Dynamical Systems

Mathematics, 2023
This paper focuses on the modification of the large parameter approach (LPA), a novelty procedure, for estimating the periodic solutions of two degrees-of-freedom (DOF) autonomous quasi-linear systems with a first integral.
A. I. Ismail, T. S. Amer, W. S. Amer
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Close Binary Stars Modeled by Two Prolate Ellipsoids in Synchronous Rotation

The Astronomical Journal, 2023
The presence of tidal deformations in close binary stars has already been confirmed by astronomical observations. The present paper aims to simply address an astronomy problem, studying the relative movement of close binaries disturbed by their mutual ...
Antonio Elipe, M. Lívia da Costa, Luca Piccotti, Eva Tresaco   +3 more
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Parameters of traveling ionospheric disturbances: results from spaced oblique HF sounding

Вісник Харківського національногоуніверситету імені В.Н. Каразіна. Серія: Радіофізика та електроніка, 2022
Urgency. A characteristic feature of the ionospheric radio channel is that its parameters depend on season, local time, solar activity, geographic coordinates, the state of the sun, the state of atmospheric-space weather, etc. The state of the atmosphere
L. F. Chernogor, K. P. Garmash, Q. Guo, Y. H. Zhdanko, V. F. Pushin, A. M. Tsymbal, Yu. Zheng   +6 more
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Leonhardi Euleri Opera omnia: Editing the works and correspondence of Leonhard Euler [PDF]

Prace Komisji Historii Nauki PAU, 2015
The paper gives an overview on the history and present state of the edition of the complete works of Leonhard Euler (1707–1783). After several failed initiatives in the 19th century, the project began in 1907 with the edition of Euler’s printed works ...
Andreas KLEINERT
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On the solar origin of interplanetary disturbances observed in the vicinity of the Earth [PDF]

Annales Geophysicae, 2003
The solar origin of 40 interplanetary disturbances observed in the vicinity of the Earth between January 1997 and June 1998 is investigated in this paper.
N. Vilmer, M. Pick, R. Schwenn, P. Ballatore, J. P. Villain   +4 more
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One-dimensional, surface emitting, disordered Terahertz lasers

APL Photonics, 2020
Quantum cascade lasers are, by far, the most compact, powerful, and spectrally pure sources of radiation at terahertz frequencies, and, as such, they are of crucial importance for applications in metrology, spectroscopy, imaging, and astronomy, among ...
Luca Salemi, Katia Garrasi, Simone Biasco, Teresa Crisci, Harvey E. Beere, David A. Ritchie, Miriam S. Vitiello   +6 more
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OGLE-2009-BLG-092/MOA-2009-BLG-137: A Dramatic Repeating Event With the Second Perturbation Predicted by Real-Time Analysis [PDF]

, 2010
We report the result of the analysis of a dramatic repeating gravitational microlensing event OGLE-2009-BLG-092/MOA-2009-BLG-137, for which the light curve is characterized by two distinct peaks with perturbations near both peaks.
A. Allan, A. Cassan, A. Cole, A. Fukui, A. Gal-Yam, A. Gould, A. Korpela, A. Shporer, A. Udalski, Albrow, B. Monard, B. S. Gaudi, Bennett, Bennett, C. H. Ling, C. Han, C. Liebig, C. S. Botzler, C. Snodgrass, C.-U. Lee, Ch. Coutures, D. J. Sullivan, D. L. Depoy, D. M. Bramich, D. Maoz, D. Moorhouse, D. P. Bennett, D. Polishook, D. Ricci, D. Suzuki, Dominik, Dominik, Dominik, Dong, Dong, E. Corrales, Erdl, F. Abe, F. Finet, F. Grundahl, F. Hayashi, F. V. Hessman, F. Zimmer, G. Maier, G. Pietrzyński, G. Scarpetta, G. Thornley, G. W. Christie, Gould, Gould, Han, Han, I. A. Bond, I. Soszyński, I. Steele, J. B. Hearnshaw, J. C. Yee, J. Greenhill, J. McCormick, J. Menzies, J. Skottfelt, J. Southworth, J. Surdej, J. Wambsganss, J.-P. Beaulieu, Jaroszyński, K. Furusawa, K. Harpsøe, K. Horne, K. Kamiya, K. Masuda, K. Nishimoto, K. Ohnishi, K. Ulaczyk, K. Wada, K.-H. Hwang, L. Mancini, L. Skuljan, M. Bos, M. D. Albrow, M. Dominik, M. Glitrup, M. Hundertmark, M. J. Burgdorf, M. K. Szymański, M. Kubiak, M. Mathiasen, N. Kains, N. Miyake, N. Rattenbury, O. Szewczyk, P. Browne, P. C. M. Yock, P. Fouqué, P. J. Tristram, P. M. Kilmartin, Pejcha, R. Poleski, R. Street, R. W. Pogge, Refsdal, S. Brillant, S. Calchi Novati, S. Dieters, S. Dreizler, S. Hosaka, S. Kaspi, S. Makita, S. Rahvar, Schneider, Sumi, T. C. Hinse, T. Sumi, To. Saito, U. G. Jørgensen, Udalski, V. Batista, V. Bozza, W. L. Sweatman, W. Lin, Y. C. Perrott, Y. Itow, Y. Matsubara, Y. Muraki, Y. Shvartzvald, Y. Tsapras, Y.-H. Ryu, Yee, Yoo, Ł. Wyrzykowski   +129 more
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