Results 91 to 100 of about 51,405 (265)

Errors in kinematic distances and our image of the Milky Way Galaxy [PDF]

open access: yes, 2006
Errors in the kinematic distances, under the assumption of circular gas orbits, were estimated by performing synthetic observations of a model disk galaxy. It was found that the error is < 0.5 kpc for most of the disk when the measured rotation curve was
Brand J.   +11 more
core   +2 more sources

Oscillating Cosmological Force Modifies Newtonian Dynamics

open access: yesGalaxies, 2020
In the Newtonian limit of general relativity a force acting on a test mass in a central gravitational field is conventionally defined by the attractive Newtonian gravity (inverse square) term plus a small repulsive cosmological force, which is ...
Igor I. Smolyaninov
doaj   +1 more source

Radiation‐Induced Degradation in Polymeric Materials: Alterations in Physical–Chemical Properties and Their Effects on Electrical Performance of Insulation Systems

open access: yesHigh Voltage, EarlyView.
ABSTRACT This paper investigates the effects of radiation on polymeric materials used as insulation systems in electrical equipment such as cables for nuclear and particle accelerator applications. After a detailed description of the physics of radiation‐induced damage in the polymeric matrix, a comprehensive analysis of the physical–chemical and ...
Simone Vincenzo Suraci, Davide Fabiani
wiley   +1 more source

On DDO154 and Cold Dark Matter halo profiles

open access: yes, 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

Revisiting Galactic Disk and Spiral Arms Using Open Clusters

open access: yesThe Astronomical Journal, 2023
We use the largest catalog of open clusters in the post-Gaia era to provide an observational view of the Galactic disk. By compiling physical parameters such as age, distance, and kinematic information, we investigate the spatial distribution of open ...
Yogesh C. Joshi, Sagar Malhotra
doaj   +1 more source

Winter‐active spiders (Clubiona) have a hyperactive antifreeze protein with a unique beta‐solenoid fold

open access: yesThe FEBS Journal, EarlyView.
Antifreeze proteins from winter‐active spiders were purified using their affinity for ice. After LC–MSMS characterization, corresponding transcripts were identified. The antifreeze protein folds as a β‐solenoid with a large flat ice‐binding site on one surface and can bind to ice crystals and prevent their growth at −4 °C.
Laurie A. Graham   +3 more
wiley   +1 more source

The Absorption and Emission Kinematics in the z=0.7450 Mg II Absorber Towards Q1331+17 [PDF]

open access: yes, 2003
(Abridged) We present a comparative analysis of the galaxy emission and QSO absorption kinematics of a z~0.7450 MgII system and its candidate absorbing galaxy (G5) located 3.86 arcsecs (28.3 h-1 kpc) from the QSO.
Ellison, Sara L.   +2 more
core   +2 more sources

Dynamics of Molecular Gas in the Central Region of the Quasar I Zwicky 1

open access: yesThe Astrophysical Journal, 2023
We present a study of the molecular gas distribution and kinematics in the cicumnuclear region (radii ≲2 kpc) of the z ≈ 0.061 quasar I Zwicky 1 using a collection of available Atacama Large Millimeter/submillimeter Array observations of the carbon ...
Qinyue Fei   +6 more
doaj   +1 more source

Central Rotation Curves of Galaxies

open access: yes, 2000
4 pages, 4 figures, in "Galaxy Disks and Disk Galaxies", ASP Conf. Series, Vatical Conf. Rome 2000, eds. J.
openaire   +2 more sources

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