Results 51 to 60 of about 106,851 (294)

Theoretical Search for Gravitational Bound States of Tachyons

Particles, 2022
The mission here is to see if we can find bound states for tachyons in some gravitational environment. That could provide an explanation for the phenomena called Dark Matter. Starting with the standard Schwarzschild metric in General Relativity, which is
Charles Schwartz
doaj   +1 more source

Milky Way Mass Models and MOND [PDF]

, 2008
Using the Tuorla-Heidelberg model for the mass distribution of the Milky Way, I determine the rotation curve predicted by MOND. The result is in good agreement with the observed terminal velocities interior to the solar radius and with estimates of the ...
Angus G. W., Begeman K. G., Binney J., Binney J., Brada R., Broeils A. H., de Blok W. J. G., Famaey B., Famaey B., Feast M., Gerhard O., Hayashi E., Iorio L., Kerr F. J., Pointecouteau E., Sanders R. H., Stacy S. McGaugh   +16 more
core   +3 more sources

Understanding the shape and diversity of dwarf galaxy rotation curves in ΛCDM [PDF]

, 2016
The shape and wide diversity of dwarf galaxy rotation curves is at apparent odds with dark matter halos in LCDM. We generate mock rotation curve data from dwarf galaxy simulations to show that this owes to bursty star formation driven by stellar feedback.
J. Read, G. Iorio, G. Iorio, O. Agertz, F. Fraternali   +4 more
semanticscholar   +1 more source

Physical properties of dark matter in galaxy U11454

Physical Sciences and Technology, 2020
In this paper physical characteristics of dark matter distribution in the spiral galaxy U11454 is exploredusing only well-known cored density profiles in the literature such as the pseudo-isothermal, Burkert,Einasto, exponential sphere, Beta and ...
K. Boshkayev
doaj   +3 more sources

A Severe Challenge to the Modified Newtonian Dynamics Phenomenology in Our Galaxy

The Astrophysical Journal, 2023
Modified Newtonian dynamics (MOND) is one of the most popular alternative theories of dark matter to explain the missing mass problem in galaxies. Although it remains controversial regarding MOND as a fundamental theory, MOND phenomenology has been shown
Man Ho Chan, Ka Chung Law
doaj   +1 more source

The structure and kinematics of the the Galaxy thin gaseous disc outside the solar orbit [PDF]

, 2007
The rotation curve of the Galaxy is generally thought to be flat. However, using radial velocities from interstellar molecular clouds, which is common in rotation curve determination, seems to be incorrect and may lead to incorrectly inferring that the ...
Galazutdinov, G. A., Strobel, A., Musaev, F. A., Bondar, A., Krelowski, J.   +4 more
core   +4 more sources

A Precise Milky Way Rotation Curve Model for an Accurate Galactocentric Distance [PDF]

Research Notes of the AAS, 2018
I provide a model rotation curve for the Milky Way that matches the details of the terminal velocity curve normalized to the Galactocentric distance $R_0 = 8.122$ kpc obtained by the GRAVITY collaboration and the corresponding circular speed of the LSR $\
S. McGaugh
semanticscholar   +1 more source

Mass models from high-resolution HI data of the dwarf galaxy NGC 1560 [PDF]

, 2010
We present HI observations performed at the GMRT of the nearby dwarf galaxy NGC 1560. This Sd galaxy is well-known for a distinct "wiggle" in its rotation curve. Our new observations have twice the resolution of the previously published HI data.
Angus, Angus, B. Famaey, Barbieri, Begeman, Begeman, Bell, Bienaymé, Blumenthal, Bosma, Broeils, Bryan, Bullock, Burkert, Buta, Casertano, Corbelli, de Blok, de Jong, de Vaucouleurs, Donato, Einasto, Famaey, Famaey, Famaey, G. Gentile, Gentile, Gentile, Gentile, Gentile, Gentile, Gentile, Gnedin, Governato, Greisen, Guo, K. Van Acoleyen, Karachentsev, Kregel, Krismer, Kuzio de Naray, Lee, M. Baes, Marchesini, Mashchenko, McGaugh, McGaugh, McGaugh, McGaugh, McGaugh, McMillan, Milgrom, Milgrom, Navarro, Navarro, Navarro, Neto, Persic, Salucci, Salucci, Sancisi, Sancisi, Sandage, Sanders, Sellwood, Sellwood, Shankar, Skillman, Tamburro, Tiret, Verheijen, Visser, Wechsler, Weinberg, Zhao   +74 more
core   +1 more source

A constant characteristic volume density of dark matter haloes from SPARC rotation curve fits [PDF]

Monthly notices of the Royal Astronomical Society, 2018
We study the scaling relations between dark matter (DM) haloes and galaxy discs using 175 galaxies from the SPARC database. We explore two cosmologically motivated DM halo profiles: the Einasto profile from DM-only simulations and the DC14 profile from ...
Pengfei Li, F. Lelli, S. McGaugh, Nathaniel Starkman, J. Schombert   +4 more
semanticscholar   +1 more source

On the Keplerian Rotation Curves of Galaxies [PDF]

Publications of the Astronomical Society of Japan, 1997
We propose a criterion for examining whether or not the uncertainty of the outer rotation curves is sufficiently small to distinguish a Keplerian rotation curve from flat ones. We have applied this criterion to both Keplerian and non-Keplerian rotation curves so far obtained, and investigated their relative fraction.
Honma, Mareki, Sofue, Yoshiaki
openaire   +2 more sources