Results 41 to 50 of about 320,186 (190)
High Resolution Rotation Curves of Low Surface Brightness Galaxies [PDF]
, 2000 High resolution Halpha rotation curves are presented for five low surface brightness galaxies. These Halpha rotation curves have shapes different from those previously derived from HI observations, probably because of the higher spatial resolution of the Halpha observations.
arxiv +1 more source
The mass distribution in early-type disk galaxies: declining rotation curves and correlations with optical properties [PDF]
Mon.Not.Roy.Astron.Soc.376:1513-1546,2007, 2007 We present rotation curves for 19, mostly luminous, early-type disk galaxies. Rotation velocities are measured from a combination of HI velocity fields and long-slit optical emission line spectra along the major axis. We find that the rotation curves generally rise rapidly in the central regions and often reach rotation velocities of 200 - 300 km/s ...
arxiv +1 more source
The Discrepancy in Galaxy Rotation Curves
, 2019 In this work we try a new approach for dealing with the discrepancy between observed galaxy rotation curves and theoretical predictions. This new approach does not involve any changes in the current fundamental laws of nature or the addition of dark halos.
Gomel, Roy, Zimmerman, Tomer
openaire +2 more sources
Galaxy rotation curves incorporating relativistic mass and comparison with Keplerian velocity curves [PDF]
arXiv, 2023 We derive a formula for the velocity distribution of an axially symmetric galaxy where the mass density is corrected using the mass formula from special relativity. We take some reasonable test mass densities and numerically compute the resulting galaxy rotation curves.
arxiv
Rotation curves of galaxies by fourth order gravity [PDF]
Physical Review D, 2011 We investigate the radial behavior of galactic rotation curves by a Fourth Order Gravity adding also the Dark Matter component. The Fourth Order Gravity is a Lagrangian containing the Ricci scalar, the Ricci and Riemann tensor, but the rotation curves are depending only on two free parameters.
G. Scelza, A. Stabile
openaire +3 more sources
The isolated interacting galaxy pair NGC 5426/27 (Arp 271)
, 2003 We present H alpha observations of the isolated interacting galaxy pair NGC 5426/27 using the scanning Fabry-Perot interferometer PUMA. The velocity field, various kinematical parameters and rotation curve for each galaxy were derived.
A. Bernal +57 more
core +2 more sources
The AGN and Gas Disk in the Low Surface Brightness Galaxy PGC045080 [PDF]
, 2007 We present radio observations and optical spectroscopy of the giant low surface brightness (LSB) galaxy PGC 045080 (or 1300+0144). PGC 045080 is a moderately distant galaxy having a highly inclined optical disk and massive HI gas content. Radio continuum
Das, M. +5 more
core +2 more sources
Mimicking Symmetry‐Breaking Einstein Ring by Optical Lens
Advanced Photonics Research, EarlyView.This article uses an optical lens to emulate the gravitational lensing effect and observe the Einstein ring (ER) patterns. The symmetry‐breaking ER, i.e., Einstein cross, is observed utilizing a rotation‐symmetry‐breaking hemi‐ellipsoid lens. Deformed Einstein cross patterns induced by noncollinearly alignment of the light source–lens–observer are ...
Jun‐Liang Duan +5 more
wiley +1 more source
On DDO154 and Cold Dark Matter halo profiles
, 1998 We investigate the claim by Burkert and Silk (1997) that the observed rotation curve of the dwarf irregular galaxy DDO154 cannot be reconciled with the universal CDM halo profile of Navarro, Frenk & White (1996,1997) even when allowance is made for the ...
Anderson +30 more
core +1 more source
Mass of the Galaxy Inferred from Outer Rotation Curve [PDF]
, 1996 Using an outer rotation curve of the Galaxy, we explore the galactic constants and the mass of the Galaxy. We show that \Theta_0 of 200 km/s is more favorable than the IAU standard value of 220 km/s, and also show that if \Theta_0 is smaller than 207 km ...
Honma, Mareki, Sofue, Yoshiaki
core +3 more sources