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Готові списки джерел за темами / Galactic rotation curves

Добірка наукової літератури з теми "Galactic rotation curves"

Автор: Grafiati

Опубліковано: 22 червня 2021

Оновлено: 14 лютого 2022

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Зміст

Статті в журналах
Дисертації
Книги
Частини книг
Тези доповідей конференцій

Статті в журналах з теми "Galactic rotation curves":

1

Mannheim, Philip D. "Linear Potentials and Galactic Rotation Curves." Astrophysical Journal 419 (December 1993): 150. http://dx.doi.org/10.1086/173468.

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2

Mannheim, Philip D., and James G. O'Brien. "Galactic rotation curves in conformal gravity." Journal of Physics: Conference Series 437 (April 22, 2013): 012002. http://dx.doi.org/10.1088/1742-6596/437/1/012002.

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3

Roberts, M. D. "Galactic rotation curves and quadratic Lagrangians." Monthly Notices of the Royal Astronomical Society 249, no. 2 (March 15, 1991): 339–42. http://dx.doi.org/10.1093/mnras/249.2.339.

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4

Ulhoa, S. C., and F. L. Carneiro. "Accelerated frames and galactic rotation curves." Modern Physics Letters A 34, no. 27 (September 6, 2019): 1950218. http://dx.doi.org/10.1142/s0217732319502183.

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In this paper, the galactic rotation curve is analyzed as an effect of an accelerated reference frame. Such a rotation curve was the first evidence for the so-called dark matter. We show another possibility for this experimental data: non-inertial reference frame can fit the experimental curve. We also show that general relativity is not enough to completely explain that which encouraged alternatives paths such as the MOND approach. The accelerated reference frames hypothesis is well-suited to deal with the rotation curve of galaxies and perhaps has some role to play concerning other evidences for dark matter.

5

Mannheim, Philip D. "Are Galactic Rotation Curves Really Flat?" Astrophysical Journal 479, no. 2 (April 20, 1997): 659–64. http://dx.doi.org/10.1086/303933.

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6

Nikiforov, Igor’ I. "Milky Way Rotation Models from Neutral Hydrogen and Molecular Clouds: Galactic Constants, Common Details and Differences." International Astronomical Union Colloquium 174 (2000): 403–7. http://dx.doi.org/10.1017/s0252921100055378.

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Kinematic data from neutral hydrogen observations provide information to solve the interdependent problems of the determination of the main Galactic constants (the Solar-Galactic center distance R0, the Oort constant A and others) and the Galactic rotation curve (Nikiforov & Petrovskaya 1994, hereafter NP94, and references therein). However, in the standard method for finding R0 by comparing the rotations of HI clouds and some other objects (typically HII regions/CO clouds), the kinematic model, constructed typically solely from HI data, is considered to be the same for both galactic subsystems (e.g. Merrifield 1992). In practice a discrepancy between their rotation curves can produce strongly erroneous results (Merrifield 1992, NP94). Establishing the common rotation law from HI plus HII/CO data in NP94 is only a part of attacking the problem.

7

Gergely, L. Á., T. Harko, M. Dwornik, G. Kupi, and Z. Keresztes. "Galactic rotation curves in brane world models." Monthly Notices of the Royal Astronomical Society 415, no. 4 (June 27, 2011): 3275–90. http://dx.doi.org/10.1111/j.1365-2966.2011.18941.x.

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8

Keeports, David. "Mass distributions implying flat galactic rotation curves." European Journal of Physics 31, no. 3 (March 15, 2010): 519–29. http://dx.doi.org/10.1088/0143-0807/31/3/009.

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9

López Fune, E. "Empirical velocity profiles for galactic rotation curves." Monthly Notices of the Royal Astronomical Society 475, no. 2 (December 20, 2017): 2132–63. http://dx.doi.org/10.1093/mnras/stx3245.

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10

Rahaman, F., M. Kalam, A. DeBenedictis, A. A. Usmani, and Saibal Ray. "Galactic rotation curves and brane-world models." Monthly Notices of the Royal Astronomical Society 389, no. 1 (September 1, 2008): 27–33. http://dx.doi.org/10.1111/j.1365-2966.2008.13559.x.

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Більше джерел

Дисертації з теми "Galactic rotation curves":

1

Magi, Matteo. "The role of the cosmological constant for galactic rotation curves." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2020. http://amslaurea.unibo.it/21179/.

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In questa tesi sono state studiate le curve di rotazione delle galassie a spirale all'interno dello schema concettuale dato dal modello Lambda CDM, con l'intento di determinare un eventuale effetto, e la relativa portata, della costante cosmologica. Lo studio del problema è stato condotto in accordo con la prospettiva geometrica dettata dalla teoria della relatività generale: assumendo una galassia descritta dalle soluzioni delle equazioni di campo, si sono studiate le curve di rotazione analizzando le geodetiche circolari. Inizialmente si è esaminato un toy model di galassia, ottenuto considerando la totalità della massa concentrata in un singolo punto, studiando così la geometria dello spaziotempo di Schwarzschild-de Sitter. Si è passati poi a un modello più realistico, che tenesse conto del contributo energetico della materia oscura presente nell’alone galattico. Questa richiesta ha portato allo studio della metrica di Lemaître-Tolman. In entrambi i casi la costante cosmologica ha un effetto sulle curve di rotazione: fissata la distanza dal centro della galassia, la velocità di rotazione di una massa di prova risulta essere minore rispetto al caso in cui \Lambda=0. Considerando distanze sempre maggiori si perde l’esistenza delle geodetiche circolari. La portata di questo effetto è apprezzabile su scale dell'ordine di centinaia di kiloparsec fino a qualche megaparsec, risultando dunque di difficile osservazione necessitando di galassie isolate ben accessibili sperimentalmente. Qualora l’effetto fosse confermato, tuttavia, questo lavoro permetterebbe una nuova misura indiretta della costante cosmologica.

2

Junqueira, Thiago Correr. "Determinação da curva de rotação galática e estudo do mínimo próximo a R0." Universidade de São Paulo, 2009. http://www.teses.usp.br/teses/disponiveis/14/14131/tde-10092009-125714/.

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A curva de rotação da Galáxia apresenta uma anomalia perto do raio da órbita solar R0, caracterizada pela presença de um mínimo. Existem trabalhos que, embora não façam uma afirmação categórica, interpretam o mínimo como sendo o resultado do decréscimo do efeito do disco, combinado com o aumento do efeito de um hipotético halo de matéria escura. A existência de tal interpretação reforça a importância de um estudo detalhado sobre sua natureza. No presente trabalho nós mapeamos a curva de rotação entre os raios galáticos 5 < R < 12 kpc usando diversas estrelas como traçadoras, por exemplo, Cefeidas, C-Miras, etc. Através de um método original realizamos o estudo cinemático para 322 Cefeidas. A partir desse estudo determinamos os melhores valores para os parâmetros da Galáxia, V0=202 +- 15 km/s e R0=7.5 +- 0.5 kpc. A melhor escolha possível para tais parâmetros é de fundamental importância, pois estes afetam a curva de rotação deduzida a partir de dados observacionais. Após determinarmos os valores de R0 e V0, analisamos as curvas de rotação obtidas por nós e vimos que elas apresentam um mínimo a uma distância de 1.5 +- 0.3 kpc de R0. O mínimo apresenta uma velocidade de 30 +- 10 km/s menor que a velocidade encontrada no raio galático igual a R0. Simulações computacionais mostraram que esse mínimo pode ser explicado por um déficit gaussiano na densidade superficial de matéria (gás + estrelas) do disco, com um decréscimo máximo de 30% do valor da densidade superficial total próxima a R0. Esse déficit pode ser explicado pelo efeito da co-rotação.
The Galaxy rotation curve shows an anomaly near the solar radius orbit R0, characterized by the presence of a minimum. There are works that implicitly interpret the minimum as the result of the decrease of the effect of the disk, combined with increasing of effect of a hypothetical dark matter halo. The existence of this interpretation reinforces the importance of a detailed study about its nature. In this work we obtained the rotation curve between Galactic radius, 5 < R < 12 kpc, using several stars as tracers, for instance, Cepheids, C-Miras, etc. Through a new method, we studied the kinematic of 322 Cepheids. From this study we determined the best values for the Galaxy parameters, V0=202 +- 15 km/s, and R0=7.5 +- 0.5 kpc. The best possible choice for such parameters is of fundamental importance since they affect the rotation curve inferred from observational data. After determining the values of R0, and V0, we analyzed the rotation curves obtained by us, and we saw that they have a minimum at a distance of 1.5 +- 0.3 kpc from R0. The minimum shows a velocity of 30 +- 10 km/s less than the velocity found at galactic radius R0. Computational simulations showed that this minimum can be explained by a Gaussian deficit of surface density of matter (gas + stars) of disk, with a maximum decrease of 30% of the value of surface density total arround R0. This deficit is explained by the effect of co-rotation.

3

Hayashi, Eric Jeffrey. "The structure of dark matter halos and disk galaxy rotation curves." 2004. http://hdl.handle.net/1828/470.

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4

Frinchaboy, Peter Michael. "Galactic disk dynamical tracers : open clusters and the local Milky Way rotation curve and velocity field /." 2006. http://wwwlib.umi.com/dissertations/fullcit/3225967.

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Книги з теми "Galactic rotation curves":

1

Silberstein, Michael, W. M. Stuckey, and Timothy McDevitt. Relational Blockworld Approach to Unification and Quantum Gravity. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780198807087.003.0007.

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The main thread of chapter 6 prompts the need for quantum gravity (QG) and introduces the RBW approach to QG, unification in particle physics, dark matter, and dark energy. The details of RBW’s modified Regge calculus and modified lattice gauge theory approaches are conveyed conceptually in the main thread. The RBW fits of galactic rotation curves, galactic cluster mass profiles, the angular power spectrum of the cosmic microwave background, and the Union2.1 supernova data associated with dark matter and dark energy are in Foundational Physics for Chapter 6. In Philosophy of Physics for Chapter 6, RBW’s taxonomic location with respect to other discrete approaches to QG is detailed and it is argued that the search for QG is stymied by the dynamical paradigm across the board. Further, it is maintained that an adynamical global constraint as the basis for QG in the block universe provides a self-vindicating unification of physics.

Частини книг з теми "Galactic rotation curves":

1

Capozziello, Salvatore. "Recovering Flat Rotation Curves and Galactic Dynamics From f(R)-Gravity." In Astrophysics and Space Science Proceedings, 3–17. Cham: Springer International Publishing, 2013. http://dx.doi.org/10.1007/978-3-319-02063-1_1.

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2

Dwornik, Marek, Zoltán Keresztes, and László Árpád Gergely. "Modified Gravity Theories and Dark Matter Models Tested by Galactic Rotation Curves." In Springer Proceedings in Physics, 427–30. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-06761-2_59.

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3

Petrovskaya, I. V., and S. Ninković. "The Contribution of the Galactic Bulge to the Galactic Rotation Curve." In Galactic Bulges, 353–54. Dordrecht: Springer Netherlands, 1993. http://dx.doi.org/10.1007/978-94-011-0922-2_50.

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4

Fuchs, B., S. Frink, S. Röser, and R. Wielen. "Proper Motion Study of the Galactic Rotation Curve." In Unsolved Problems of the Milky Way, 689–95. Dordrecht: Springer Netherlands, 1996. http://dx.doi.org/10.1007/978-94-009-1687-6_114.

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5

Hron, J., and H. M. Maitzen. "Young Galactic Clusters and the Rotation Curve of our Galaxy." In The Milky Way Galaxy, 105–6. Dordrecht: Springer Netherlands, 1985. http://dx.doi.org/10.1007/978-94-009-5291-1_11.

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6

"Rotation curves and galaxy mass." In Gravitational Physics of Stellar and Galactic Systems, 420–26. Cambridge University Press, 1985. http://dx.doi.org/10.1017/cbo9780511564239.065.

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7

Malagoli, Andrea, and Remo Ruffini. "THEORETICAL CONSIDERATIONS ON THE ROTATION CURVES OF GALACTIC HALOS." In Advanced Series in Astrophysics and Cosmology, 11–24. WORLD SCIENTIFIC, 1985. http://dx.doi.org/10.1142/9789814415354_0002.

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8

De Rújula, Alvaro. "Dark Matter." In Enjoy Our Universe, 169–74. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780198817802.003.0032.

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Анотація:

What we know or do not know about dark matter. The evidence for its existence, first found by Fritz Zwicky. The “virial theorem” and the Coma cluster. The rotation curves of galaxies. Galactic dark-matter halos. Gravitational lensing and the May 1919 solar eclipse, a thiumph of General Relativity that propelled Einstein to his fame. The deflection of starlight by the eclipsed Sun. Gravitational lenses, Einstein rings, and Smilie. Gravitational-lensing and evidence for dark matter in the Bullet cluster of galaxies.

Тези доповідей конференцій з теми "Galactic rotation curves":

1

Khan, Irshadullah. "The nature of dark matter and galactic rotation curves." In Dark matter. AIP, 1995. http://dx.doi.org/10.1063/1.48321.

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2

Magalhaes, Nadja S., and Fred I. Cooperstock. "Galactic mapping using general relativity and observational rotation curves." In Proceedings of the MG14 Meeting on General Relativity. WORLD SCIENTIFIC, 2017. http://dx.doi.org/10.1142/9789813226609_0296.

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3

DWORNIK, MAREK, ZOLTÁN KERESZTES, and LÁSZLÓ Á. GERGELY. "BOSE-EINSTEIN CONDENSATE DARK MATTER MODEL TESTED BY GALACTIC ROTATION CURVES." In Proceedings of the MG13 Meeting on General Relativity. WORLD SCIENTIFIC, 2015. http://dx.doi.org/10.1142/9789814623995_0147.

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4

Bratek, Lukasz, and Joanna Jalocha. "Galactic magnetic fields in the context of dark matter. Influence on the rotation curves of spiral galaxies." In 36th International Cosmic Ray Conference. Trieste, Italy: Sissa Medialab, 2019. http://dx.doi.org/10.22323/1.358.0513.

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5

DE BOER, W. "THE DARK CONNECTION BETWEEN THE EGRET EXCESS OF DIFFUSE GALACTIC GAMMA RAYS, THE CANIS MAJOR DWARF, THE MONOCEROS RING, THE INTEGRAL 511 keV ANNIHILATION LINE, THE GAS FLARING AND THE GALACTIC ROTATION CURVE." In Proceedings of the 6th International Heidelberg Conference. WORLD SCIENTIFIC, 2008. http://dx.doi.org/10.1142/9789812814357_0002.

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