Results 81 to 90 of about 293,596 (222)
Kinematics of Nuclei of Sc Galaxies [PDF]
Highlights of Astronomy, 1980 For a sample of 21 Sc galaxies with a wide range of luminosities, of radii, and of masses, W. K. Ford and I have obtained spectra and determined rotation curves. By their kinematical behavior in their central regions, the Sc’s can be separated into two groups. Some galaxies, generally small and of low luminosity, have shallow central velocity gradients,
openaire +1 more source
The clustering of galaxies in hierarchical galaxy formation models [PDF]
, 2010 Galaxy clustering encodes information about the values of cosmological parameters and also about the physical processes behind galaxy formation and evolution. The GALFORM semi-analytical model is the theoretical approach we used to model galaxy formation.
KIM, HAN,SIK, Kim, Han Sik
core
The Astrophysical JournalOne of the biggest challenges in cosmology, the Hubble tension, requires independent measurements of H _0 , and strong lensing with time-delay cosmography is a promising avenue.
Vishal Verma, Quinn Minor
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When is a Bulge Not a Bulge? Revealing the Satellite Nature of NGC 5474’s Bulge
The Astrophysical JournalA satellite galaxy of the nearby spiral M101, NGC 5474 has a prominent bulge offset from the kinematic center of the underlying star-forming disk that has gained attention in recent years.
Ray Garner III +2 more
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Astronomische Nachrichten, Volume 347, Issue 6, July 2026.ABSTRACT The goal of this study is to confirm the feasibility of the use of digitized low dispersive MtWilson Michigan Southern Sky Hα$$ \alpha $$ survey astronomical photographic plates for modern astrophysical research. The detection of highly redshifted objects, such as early galaxies and quasars, is fundamental to understanding the universe's ...
Tauseef Ahmad Zafar +3 more
wiley +1 more source
Kinematics of the open cluster system in the Galaxy
, 2006 Absolute proper motions and radial velocities of 202 open clusters in the solar neighborhood, which can be used as tracers of the Galactic disk, are used to investigate the kinematics of the Galaxy in the solar vicinity, including the mean heliocentric ...
Chen, L, Zu, ZL, Zhao, JL
core
On the Origin of the Variety of Velocity Dispersion Profiles of Galaxies
The Astrophysical JournalObserved and simulated galaxies exhibit a significant variation in their velocity dispersion profiles. We examine the inner and outer slopes of stellar velocity dispersion profiles using integral field spectroscopy data from two surveys, SAMI (for z < 0 ...
San Han +10 more
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On the kinematical behavior of galaxies in clusters
The Astronomical Journal, 1989 The sample of 15 galaxy clusters published by Dressler and Shectman (1988) has been analyzed to search for a tendency for spiral and irregular galaxies to have greater velocity dispersion than the ellipticals and lenticulars. It is shown that this trend is highly significant, with a probability of less than 0.05 percent that it may result from ...
Laerte, Jr. Sodre +3 more
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Galaxy kinematics from counter-dispersed imaging
, 1999 Determining the internal kinematics of a galaxy from planetary nebulae (PN) is usually a two-step process in which the candidate PN are first identified in a target galaxy and then, in a follow-up run, spectra are obtained.
Taylor, K, Douglas, NG
core +1 more source
Identifying Signatures of Inflow onto Face-on Galaxies Using the Balmer Decrement
The Astrophysical JournalIsolated star-forming galaxies require inflows of fresh gas from the surrounding medium to sustain episodes of star formation over time. However, there are very few direct detections of accretion onto external galaxies.
Meghna Sitaram +6 more
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