Results 21 to 30 of about 61,724 (212)

A Relativistic Entropic Hamiltonian–Lagrangian Approach to the Entropy Production of Spiral Galaxies in Hyperbolic Spacetime

Universe, 2021
Double-spiral galaxies are common in the Universe. It is known that the logarithmic double spiral is a Maximum Entropy geometry in hyperbolic (flat) spacetime that well represents an idealised spiral galaxy, with its central supermassive black hole (SMBH)
Michael C. Parker, Chris Jeynes
doaj   +1 more source

Spin Parity of Spiral Galaxies. I. Corroborative Evidence for Trailing Spirals

The Astrophysical Journal, 2019
Whether the spiral structure of galaxies is trailing or leading has been a subject of debate. We present a new spin parity catalog of 146 spiral galaxies that lists the following three pieces of information: whether the spiral structure observed on the ...
Masanori Iye, Ken-ichi Tadaki, Hideya Fukumoto   +2 more
doaj   +1 more source

Star Formation Efficiency in the Central 1 kpc Region of Early-Type Spiral Galaxies [PDF]

, 2000
It has been reported recently that there are some early-type spiral (Sa--Sab) galaxies having evident star-forming regions which concentrate in their own central 1-kpc.
Akio K. Inoue, Buat V., Garcia-Barreto J. A., Genkin I. L., Hideyuki Kamaya, Hiroyuki Hirashita, Honma M., Inoue A. K., Kamaya H., Kamaya H., Read A. M., Sofue Y., Tomita A.   +12 more
core   +3 more sources

The Origin and Evolution of Giant Radio Galaxies

Frontiers in Astronomy and Space Sciences, 2022
Giant radio galaxies are arguably the least understood of jetted active galactic nuclei (AGN). We propose that radio galaxies are the product of large mergers that do not involve radio galaxies or radio quasars, such as in merging spiral galaxies, while ...
David Garofalo
doaj   +1 more source

Dependence of stellar substructures in M31 type galaxy on satellite morphology in galaxy mergers [PDF]

Serbian Astronomical Journal, 2022
Stellar streams and shells are observed in halos of spiral galaxies. In this paper, we investigated the formation of these structures due to mergers between the host spiral galaxy and its dwarf satellite galaxies.
Milošević S.
doaj   +1 more source

Compact X-ray Sources in Nearby Galaxy Nuclei [PDF]

, 1998
We have found compact, near-nuclear X-ray sources in 21 (54\%) of a complete sample of 39 nearby face-on spiral and elliptical galaxies with available ROSAT HRI data. ROSAT X-ray luminosities (0.2 $-$ 2.4 keV) of these compact X-ray sources are $\sim$10$^
Briel, Cavaliere, Colbert, Colbert, de Vaucouleurs, Dickey, Ebisawa, Edward J.M Colbert, Kormendy, Matsushita, Mitsuda, Nandra, Richard F Mushotzky, Shrader, Tanaka   +14 more
core   +3 more sources

Spatial clustering in the ESO-Sculptor Survey: two-point correlation functions by galaxy type at redshifts 0.1 - 0.5 [PDF]

, 2007
We calculate the spatial two-point auto and cross-correlation functions for the 765 galaxies with ...
Abazajian, Abbas, Andreon, Arnouts, Baldi, Baugh, Bellanger, Bellanger, Benoist, Benson, Benson, Berlind, Berlind, Bernstein, Binggeli, Blanton, Brainerd, Bromley, Budavári, Carlberg, Coil, Coil, Cole, Colless, Conroy, Cooray, Courteau, Davis, Davis, de Lapparent, de Lapparent, de Lapparent, de Lapparent, Dressler, Díaz, E. Slezak, Efstathiou, Ekholm, Ferguson, Fioc, Fisher, Folkes, Galaz, Giuricin, Grant, Guzzo, Hamilton, Hawkins, Hermit, Hogg, Jenkins, Jerjen, Jing, Kauffmann, Kauffmann, Kennicutt, Kerscher, Landy, Le Fevre, Li, Lilly, Lin, Ling, Loveday, Loveday, Loveday, Madgwick, Magliocchetti, Masjedi, Maurogordato, Meneux, Navarro, Norberg, Park, Pearce, Perlmutter, Phillips, Phleps, Phleps, Pollo, Pons-Bordería, Postman, Ramella, Ratcliffe, Ratcliffe, Ratcliffe, Riess, Saunders, Schechter, Shectman, Shepherd, Small, Small, Smoot, Tonry, Trentham, Trentham, Trentham, Tucker, V. de Lapparent, Weinmann, Willmer, Yahil, Yang, Yang, Yang, Yang, Yang, Yang, Yoshida, Zandivarez, Zehavi, Zehavi, Zehavi, Zheng   +114 more
core   +5 more sources

Spiral Galaxies

, 2023
Our vision of galaxies has changed significantly since the era of large galaxy surveys like the Sloan, which gave us extensive statistics with millions of galaxies. The Hubble sequence classification described in Chapter 1 still remains very widely used but has been enriched with broad categories based on color that indicate the recent formation of ...
openaire   +2 more sources

NUMERICAL MODELLING OF GAS DYNAMIC STRUCTURES IN SPIRAL GALAXIES

Odessa Astronomical Publications, 2013
Observations show that in the global morphology of spiral galaxies appear and form multi-scale features that are embedded in a complex complete picture of the galaxy.
A. Lugovskiy, E. Filistov
doaj   +1 more source

Galactic Density and Evolution Based on the Virial Theorem, Energy Minimization, and Conservation of Angular Momentum

Galaxies, 2018
Spiral galaxies are spinning, internally densified objects. The Virial Theorem explains galactic rotation curves via its linkage of the rotation rate to the gravitational self-potential (Ug) and the moment of inertia of oblate spheroids.
Robert E. Criss, Anne M. Hofmeister
doaj   +1 more source