Results 11 to 20 of about 4,067 (216)
, 2013 We calculate the stellar surface mass density (Sigma_*) and two-component (gas+stars) disk stability (Q_RW) for 25 late-type galaxies from the DiskMass Survey. These calculations are based on fits of a dynamical model to our ionized-gas and stellar kinematic data performed using a Markov Chain Monte Carlo sampling of the Bayesian posterior ...
Westfall, K. B. +5 more
core +7 more sources
Properties of isolated disk galaxies [PDF]
Astronomy & Astrophysics, 2004 28 pages, 5 figures.
J. VARELA +5 more
openaire +3 more sources
Galaxies, 2015 I discuss my latest observational data and ideas about decoupled gaseous subsystems in nearby lenticular galaxies. As an extreme case of inclined gaseous disks, I demonstrate a sample of inner polar disks, derive their incidence, about 10% among the ...
Olga Sil’chenko
doaj +1 more source
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
Similar Signatures of Coplanar Gas Inflow and Disk Warps in Galactic Gas Kinematic Maps
The Astrophysical Journal, 2023 Hydrodynamic simulations suggest that galactic gas disks form when coplanar gas spirals into the inner regions of the disk. We recently presented a simple modified accretion disk model of viscous galactic disks in which star formation is fed by a radial ...
Enci Wang, Simon J. Lilly
doaj +1 more source
EPJ Web of Conferences, 2012 In this contribution, we will present two results we have recently obtained in studying the impact of satellite(s) accretions on stellar disks, and that concern: (1) the distribution of the eccentricities of stars in thick disks; (2) the characteristics ...
van Driel W. +3 more
doaj +1 more source
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
Understanding the Fundamental Plane and the Tully Fisher Relation
Frontiers in Astronomy and Space Sciences, 2020 The relation between early type galaxy size, surface brightness and velocity dispersion, “the fundamental plane,” has long been understood as resulting from equilibrium in their largely pressure supported stellar dynamics.
Jeremy Mould
doaj +1 more source