Results 101 to 110 of about 356,387 (135)

An investigation of the active galaxies M82 and NGC 5128 [PDF]

, 1995
In this thesis we present multi-waveband imaging polarimetry and spectropolarime- try of the starburst galaxy M82 and multi-waveband imaging polarimetry of the active galaxy NGC 5128. A review of previous studies of these galaxies is given.
Foley, Neasa
core  

MUSE Study of Two Giant Low-surface-brightness Galaxies with Compact Satellites

The Astrophysical Journal
Giant low-surface-brightness galaxies (gLSBGs) are rare objects with disk radii up to 160 kpc and dynamical masses of up to the order of 10 ^12 M _⊙ . Their very existence challenges currently accepted theories of galaxy formation and evolution, as it is
Anna S. Saburova, Damir Gasymov, Ivan S. Gerasimov, Oleg V. Egorov, Igor V. Chilingarian, Fedor M. Kolganov, Anatoly V. Zasov, Evgenii V. Rubtsov, Anton V. Afanasiev, Mariia V. Demianenko   +9 more
doaj   +1 more source

Bubbles and Superbubbles in Disk Galaxies

, 2012
Bubbles and Superbubbles are among the largest and most energetic structures in the Interstellar Medium (ISM). It is thought that most bubbles are formed from the combined effects of stellar winds and supernovae, which plow through the ISM, sweeping up ...
N.M. McClure-Griffiths
core   +1 more source

Spiral structure of disk galaxies and hidden mass effect

Известия высших учебных заведений. Поволжский регион: Физико-математические науки
Background. A theory of disk galaxies with a violation of cylindrical symmetry is being constructed, which solves the problem of the spiral structure of galaxies within the framework of a general density wave model. Materials and methods.
V.M. Zhuravlev
doaj   +1 more source

Ultradeep Imaging of Nearby Dwarf Irregular Galaxies: Stellar Haloes and Disk Structure

The Astronomical Journal
We have examined the stellar structure of 10 nearby, low stellar mass (10 ^6 –6 × 10 ^7 M _⊙ ) dwarf irregular galaxies by fitting ellipses as a function of surface brightness on ultradeep V images. These are compared to far-ultraviolet images as tracers
Deidre A. Hunter, Bruce G. Elmegreen
doaj   +1 more source

Cluster tidal fields: Effects on disk galaxies [PDF]

, 1993
A variety of observations of galaxies in clusters indicate that the gas in these galaxies is strongly affected by the cluster environment. We present results of a study of the dynamical effects of the mean cluster tidal field on a disk galaxy as it falls
Valluri, Monica
core  

The Spatial Distribution of Type Ia Supernovae within Host Galaxies

The Astronomical Journal
We study how type Ia supernovae (SNe Ia) are spatially distributed within their host galaxies, using data taken from the Sloan Digital Sky Survey (SDSS).
Christopher Pritchet, Karun Thanjavur, Connor Bottrell, Yan Gao   +3 more
doaj   +1 more source

The Dependency of Bar Formation Timescale on Disk Mass Fraction, Toomre Q, and Scale Height

The Astrophysical Journal
Bars are one of the most prominent galactic structures. The classical swing-amplification theory can qualitatively describe the spontaneous bar instability of stellar disks.
Bin-Hui Chen, Juntai Shen
doaj   +1 more source

Early-type disk galaxies

, 2011
In this thesis I investigate the dynamics and stellar populations of a sample of 28 edge-on early-type (S0--Sb) disk galaxies, 22 of which host a boxy or peanut-shaped bulge.
Bureau, Martin, Williams, Michael J
core  

Illuminating the Incidence of Extraplanar Dust Using Ultraviolet Reflection Nebulae with GALEX

The Astrophysical Journal
Circumgalactic dust grains trace the circulation of mass and metals between star-forming regions and gaseous galactic halos, giving insight into feedback and tidal stripping processes.
Erin Boettcher, Edmund Hodges-Kluck
doaj   +1 more source