Results 101 to 110 of about 2,129 (213)

Empirical velocity profiles for galactic rotation curves [PDF]

, 2017
International audienceA unified parametrization of the circular velocity, which accurately fits 850 galaxy rotation curves without needing in advance the knowledge of the luminous matter components, nor a fixed dark matter halo model, is proposed.
E López Fune, Lopez Fune, E.
core   +1 more source

The shapes of the rotation curves of star-forming galaxies over the last ≈10 Gyr [PDF]

, 2019
We analyse maps of the spatially resolved nebular emission of ≈1500 star-forming galaxies at z ≈ 0.6–2.2 from deep K-band Multi-Object Spectrograph and MUSE observations to measure the average shape of their rotation curves.
Bacon, Roland, Bower, RG, Smail, Ian, Smail, I, Bower, R. G., Bureau, M, Swinbank, A.M., Sharples, RM, Bunker, A.J., Tiley, AL, Swinbank, AM, Turner, O. J., Sobral, D., Magdis, G., Bower, R.G., Theuns, T, Turner, OJ, Harrison, CM, Cirasuolo, M, Schaller, M., Sharples, R.M., Richard, J, Bacon, R, Cirasuolo, M., Stott, JP, Tiley, Alfred L., Best, P., Theuns, T., Richard, J., Bureau, Martin, Magdis, G, Bureau, M., Schaller, M, Bunker, AJ, Gillman, S., Gillman, S, Bacon, R., Turner, O.J., Best, P, Tiley, A.L., Stott, J. P., Stott, J.P., Bunker, A. J., Swinbank, A. M., Sharples, R. M., Smail, I., Harrison, C. M., Sobral, D, Bunker, Andrew J., Harrison, C.M.   +49 more
core   +4 more sources

Low Frequency Extensions of Cyclotron Maser Instability‐Generated Radio Emission: A Statistical View From Cassini at Saturn

Journal of Geophysical Research: Space Physics, Volume 131, Issue 8, August 2026.
Abstract The Cassini spacecraft spent 13 years orbiting Saturn, quasi‐continuously measuring Saturn's radio emissions. One of the key elements of the radio spectrum at Saturn is the Saturn Kilometric Radiation (SKR), and several studies have been written on events called Low Frequency Extensions (LFEs) which represent strong, continuous extensions of ...
C. M. Jackman, A. R. Fogg, S. W. H. Cowley, G. Provan, H. Adamski, N. M. Besch, D. M. Hollman, S. Walker, M. J. Rutala, L. Lamy, C. K. Louis, E. P. O’Dwyer   +11 more
wiley   +1 more source

Observational Biases on Rotation Curves from Integral Field Unit Data at Cosmic Noon

The Astrophysical Journal
Through studying rotation curves, which depict how the velocity of the stars and gas changes with distance from the center of a galaxy, it has been confirmed that dark matter dominates galaxies’ outer regions, as their rotation curve remains flat ...
Amanda E. Araujo-Carvalho, Thiago S. Gonçalves, Davor Krajnović, Karín Menéndez-Delmestre, Natanael de Isídio   +4 more
doaj   +1 more source

Comparison of HMG and Flat Rotation Velocities Inferred from Galaxy–Galaxy Weak Lensing

The Astrophysical Journal
Despite the success of dark matter models, unresolved issues require exploring alternatives such as modified gravity theories. In this context, we examine the compatibility of the hyperconical modified gravity (HMG) with galaxy rotation curves inferred ...
Robert Monjo
doaj   +1 more source

Non-circular motions and the diversity of dwarf galaxy rotation curves [PDF]

, 2018
We use mock interferometric H I measurements and a conventional tilted-ring modelling procedure to estimate circular velocity curves of dwarf galaxy discs from the APOSTLE suite of Λ cold dark matter cosmological hydrodynamical simulations. The modelling
Frenk, C.S., Schaye, Joop, Oman, K.A., Navarro, Julio F, Marasco, Antonino, Benitez-Llambay, Alejand ro, Marasco, A., Navarro, Julio F., Benítez-Llambay, Alejandro, Frenk, Carlos S., Navarro, J.F., Schaye, J., Oman, Kyle A., Oman, Kyle A, Benítez-Llambay, A., Frenk, Carlos S   +15 more
core   +1 more source

CONSTRAINTS ON THE DECOMPOSITION OF THE ROTATION CURVES OF SPIRAL GALAXIES [PDF]

The Identification of Dark Matter, 2003
I discuss anew how arguments about the internal dynamics of galactic disks set constraints on the otherwise ambiguous decomposition of the rotation curves of spiral galaxies into the contributions by the various constituents of the galaxies. Analyzing the two sample galaxies NGC 3198 and NGC 2985 I conclude from the multiplicities of the spiral arms ...
openaire   +2 more sources

A new estimator of the deceleration parameter from galaxy rotation curves [PDF]

, 2016
Invited presentation at the 7th KIAS Workshop on Structure Formation and Cosmology (2016), accompanying https://doi.org/10.5281/zenodo.162267. Inertia is perturbed when the Rindler horizon drops beyond the cosmological horizon. Implication are confronted
Maurice H.P.M. van Putten, Maurice H.P.M. van Putten (5179163)   +1 more
core   +1 more source

On the Extraction of Optical Rotation Curves for Spiral Galaxies [PDF]

Journal of Astronomy and Space Sciences, 1998
We discussed four different methods - the single, double and triple Gaussian fits, and the intensity weighted centroid fit - which extract rotation curves from several emission lines ([OII], Hβ, [OIII], and Hα) of spiral galaxies. Spatial extents and the
Young-Jong Sohn, Myung-Hyun Rhee, Mun-Suk Chun   +2 more
doaj  

The Survival of the Sagittarius Dwarf Galaxy and the Flatnessof the Rotation Curve of the Galaxy

The Astrophysical Journal, 1998
How has the ``fluffy'' core of the Sgr dwarf galaxy survived multiple strong shocks from the tidal force of the Galactic halo and disc since the formation of the core a Hubble time ago? A scenario that Sgr was deflected to its current orbit by the Magellanic Clouds after a rendezvous on the north Galactic pole 2-3 Gyrs ago is examined. It is shown that
openaire   +2 more sources