Results 21 to 30 of about 9,531 (227)
Properties of isolated disk galaxies [PDF]
Astronomy & Astrophysics, 2004 28 pages, 5 figures.
J. VARELA +5 more
openaire +3 more sources
THE OUTER DISKS OF GALAXIES:“TO BE OR NOT TO BE TRUNCATED?” [PDF]
, 2007 We have in recent years come to view the outer parts of galaxies as having vital clues about their formation and evolution. Here, we would like to briefly present our results from a complete sample of nearby, late-type, spiral galaxies, using data from the SDSS survey, especially focused on the stellar light distribution in the outer disk.
Pohlen, M., Trujillo, I.
openaire +3 more sources
On the Extended Knotted Disks of Galaxies [PDF]
The Astronomical Journal, 2007 The stellar disks of many spiral galaxies are twice as large as generally thought. We use archival data from the Galaxy Evolution Explorer mission (GALEX) to quantify the statistical properties of young stellar clusters in the outer, extended disks of a sample of eleven nearby galaxies.
Zaritsky, Dennis, Christlein, Daniel
openaire +2 more sources
THE PARKER INSTABILITY IN DISK GALAXIES [PDF]
The Astrophysical Journal, 2015 ABSTRACT We examine the evolution of the Parker instability in galactic disks using 3D numerical simulations. We consider a local Cartesian box section of a galactic disk, where gas, magnetic fields, and cosmic rays are all initially in a magnetohydrostatic equilibrium. This is done for different choices of initial cosmic-ray density and
L. F. S. Rodrigues +4 more
openaire +3 more sources
Estimate of SMBH Spin for Narrow-Line Seyfert 1 Galaxies [PDF]
, 2023 We estimated the spin values of the supermassive black holes (SMBHs) of the active galactic nuclei (AGN) for a large set of Narrow Line Seyfert 1 (NLS1) galaxies assuming the inclination angle between the line of sight and the axis of the accretion disk ...
Mikhail Piotrovich +2 more
core +1 more source
Disk Galaxies Are Self-similar: The Universality of the H i-to-Halo Mass Ratio for Isolated Disks
The Astrophysical Journal Letters, 2023 Observed scaling relations in galaxies between baryons and dark matter global properties are key to shed light on the process of galaxy formation and on the nature of dark matter.
Marie Korsaga +9 more
doaj +1 more source
Extended stellar Counter-Rotation in Disk Galaxies [PDF]
, 2023 reservedStudying stellar counter-rotation disks can provide valuable insights into the formation, evolutionary history of these galaxies. Aims, search the present day literature with idea of building a data base of all stellar counter-rotation disk ...
AL OBAID, MAYS AHMED MIJWIL
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The evolution of disk galaxies in clusters [PDF]
Astrophysics and Space Science, 2002 We are carrying out a programme to measure the evolution of the stellar and dynamical masses and M/L ratios for a sizeable sample of morphologically-classified disk galaxies in rich galaxy clusters at 0 ...
Aragon-Salamanca, Alfonso +4 more
openaire +3 more sources
On the Decline of Star Formation during the Evolution of Galaxies
The Astrophysical Journal, 2023 Cosmological simulations predict that during the evolution of galaxies, the specific star formation rate continuously decreases. In a previous study we showed that generally this is not caused by the galaxies running out of cold gas but rather a decrease
Adelheid Teklu +4 more
doaj +1 more source
Counter-Rotating Disks in Galaxies [PDF]
, 2023 reservedCounter-rotation is a phenomenon found in some galaxies; it happens when a counter-rotating disk which rotates in an opposite direction to the main disk is found.
EL-SAYEGH, ALYAA EL-HAK
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