Results 131 to 140 of about 476,460 (296)
Automated Quantitative Description of Spiral Galaxy Arm-Segment Structure [PDF]
, 2013 We describe a system for the automatic quantification of structure in spiral galaxies. This enables translation of sky survey images into data needed to help address fundamental astrophysical questions such as the origin of spiral structure---a ...
Davis, Darren, Hayes, Wayne
core
The V_c-sigma_c relation in high and low surface brightness galaxies
, 2004 We investigate the relation between the asymptotic circular velocity, V_c, and the central stellar velocity dispersion, sigma_c, in galaxies. We consider a new sample of high surface brightness spiral galaxies (HSB), low surface brightness spiral ...
Bertola, F. +5 more
core +1 more source
TESTING THEORIES IN BARRED-SPIRAL GALAXIES [PDF]
, 2011 According to one version of the recently proposed “manifold” theory that explains the origin of spirals and rings in relation to chaotic orbits, galaxies with stronger bars should have a higher spiral arms pitch angle when compared to galaxies with ...
E. E. Mart'inez-Garc'ia
semanticscholar +1 more source
SELF-PERPETUATING SPIRAL ARMS IN DISK GALAXIES [PDF]
, 2012 The causes of spiral structure in galaxies remain uncertain. Leaving aside the grand bisymmetric spirals with their own well-known complications, here we consider the possibility that multi-armed spiral features originate from density inhomogeneities ...
E. D’Onghia +2 more
semanticscholar +1 more source
, 2015 Based on SDSS data, we have selected a sample of nine edge-on spiral galaxies with bulges whose major axes show a high inclination to the disk plane. Such objects are called polar-bulge galaxies.
Bizyaev, D. V. +4 more
core +1 more source
On the Role of Noncircular Motions in MaNGA Galaxies. I. Global Properties
The Astrophysical JournalNoncircular (NC) motions represent the imprints of nonaxisymmetric structures in galaxies, providing opportunities to study the physical properties of gas departing from circular rotation.
Carlos López-Cobá +3 more
doaj +1 more source
International Journal of Engineering and Management Sciences, 2018 Recently, it has been suggested that entangled particles may be connected by a wormhole. If that is right, what is the distance between them we have to take into account when applying Newton's law of universal gravitation to these particles?
Sándor Buglyó
doaj +1 more source
Spiral arm pitch angle and galactic shear rate in N-body simulations of disc galaxies [PDF]
, 2012 Spiral galaxies are observed to exhibit a range of morphologies, in particular in the shape of spiral arms. A key diagnostic parameter is the pitch angle, which describes how tightly wound the spiral arms are.
R. Grand, D. Kawata, M. Cropper
semanticscholar +1 more source
THE OPACITY OF SPIRAL GALAXY DISKS [PDF]
, 2007 The opacity of foreground spiral disks can be probed from the number of distant galaxies seen through them. To calibrate this number for effects other than the dust extinction, Gonzalez et al. (1998) developed the "Synthetic Field Method". A synthetic field is an extincted Hubble Deep Field added to the science field.
Holwerda, Benne W. +3 more
openaire +2 more sources
Luminous Infrared Galaxies in the Local Universe
, 2006 We study the morphology and star formation properties of 159 local luminous infrared galaxy (LIRG) using multi-color images from Data Release 2 (DR2) of the Sloan Digital Sky Survey (SDSS). The LIRGs are selected from a cross-correlation analysis between
Cao, C. +5 more
core +1 more source