Results 71 to 80 of about 1,105 (188)
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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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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Kinematic Distances of Galaxies in the Local Volume
AstrophysicsWe consider the kinematic distances to nearby galaxies obtained by the Numerical Action Method (NAM) based on the Cosmic-flow-3 survey data. NAM distances are compared with 418 high-precision distances measured by the Tip of the Red Giant Branch (TRGB) method using the Hubble Space Telescope.
Karachentsev, I. D., Popova, A. A.
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Exploration of Halo Substructures in Integrals-of-motion Space with Gaia Data Release 3
The Astrophysical JournalUsing kinematic data from the Gaia Data Release 3 catalog, along with metallicity estimates robustly derived from Gaia BP/RP spectra, we have explored the Galactic stellar halo in search of both known and potentially new substructures.
Haoyang Liu +4 more
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Kinematics of gas in a triaxial galaxy
The Astrophysical Journal, 1989 The morphology and kinematics of cold gas in a triaxial Staeckel potential are discussed. The properties of the gas disks and rings and their projections are examined. How observations of a ring or disk can be used to constrain the orientation of the galaxy with respect to the observer and how the intrinsic shape can be determined are analyzed, and it ...
Zeeuw, P.T. de, Franx, M.
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Identifying substructure associations in the Milky Way halo using chemo-kinematic tagging
Astronomy & AstrophysicsContext. The Milky Way halo has been built-up over cosmic time through the accretion and dissolution of star clusters and dwarf galaxies as well as through their complex interactions with the Galactic disc.
Youakim K., Lind K.
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Closing the Gap between Observed Low-mass Galaxy H i Kinematics and Cold Dark Matter Predictions
The Astrophysical JournalTesting the standard cosmological model (ΛCDM) at small scales is challenging. Galaxies that inhabit low-mass dark matter halos provide an ideal test bed for dark matter models by linking observational properties of galaxies at small scales (low mass ...
Amy Sardone +3 more
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The Strength of Bisymmetric Modes in SDSS-IV/MaNGA Barred Galaxy Kinematics
The Astrophysical JournalThe Sloan Digital Sky Survey-IV/Mapping Nearby Galaxies at Apache Point Observatory (MaNGA) Survey data provide an unprecedented opportunity to study the internal motions of galaxies and, in particular, represent the largest sample of barred galaxy ...
Brian DiGiorgio Zanger +9 more
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The Vertical Structure and Kinematics of the Galaxy [PDF]
Symposium - International Astronomical Union, 1994 A sample including 2370 stars with (U, V) velocities has been analyzed up to z = 2.5 kpc. It is shown that the observed vertical gradient in the velocity distribution can be explained by the sum of 3 discrete populations with constant kinematics. The observations are well fitted by
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