Results 131 to 140 of about 9,531 (227)

The First Quenched Galaxies: When and How?

The Astrophysical Journal Letters
Many quiescent galaxies discovered in the early Universe by JWST raise fundamental questions on when and how these galaxies became and stayed quenched. Making use of the latest version of the semianalytic model GAEA that provides good agreement with the ...
Lizhi Xie, Gabriella De Lucia, Fabio Fontanot, Michaela Hirschmann, Yannick M. Bahé, Michael L. Balogh, Adam Muzzin, Benedetta Vulcani, Devontae C. Baxter, Ben Forrest, Gillian Wilson, Gregory H. Rudnick, M. C. Cooper, Umberto Rescigno   +13 more
doaj   +1 more source

Evolution of galactic disks and spheroids [PDF]

, 2004
In this Thesis the structural properties of galaxies using quantitative 2-dimensional bulge to disk decompositions are analysed across a range of environments and red- shifts.
Dzanovic, Dajana
core  

The dynamics of molecular gas in nearby galaxies [PDF]

, 2013
Includes abstract.
Frank, Bradley Stanton
core  

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

The effect of the environment on the evolution of galaxy colours [PDF]

, 2006
In chapter 1 of this thesis, I give a brief overview of the birth of modern cosmology and the growth of the current paradigm. I then go on to describe the different types of galaxies, the star formation rates within them and give some notes about galaxy ...
Davies, Gregory Tudor
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

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

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

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

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