Results 101 to 110 of about 455,148 (185)

Astronomia ex machina: a history, primer and outlook on neural networks in astronomy. [PDF]

R Soc Open Sci, 2023
Smith MJ, Geach JE.
europepmc   +1 more source

A Stellar Bar Hidden in an Extreme Gas-rich Disk Galaxy at z = 4.055

The Astrophysical Journal Letters
The classical picture for the formation of stellar bars—key dynamical drivers of the evolution of galaxies—is through secular evolution of instability in gas-poor, stellar-dominated disks. The detection with the James Webb Space Telescope of stellar bars
Leindert A. Boogaard, Luca Costantin, Thor Tepper-García, Joss Bland-Hawthorn, Jacqueline A. Hodge, Cheng-Lin Liao, Mahmoud Hamed, Luis Colina, Fabian Walter, Oscar Agertz, Arjan Bik, Alejandro Crespo Gómez, Emanuele Daddi, Georgios E. Magdis, Pablo G. Pérez-González, Hannah Übler, Axel Weiss   +16 more
doaj   +1 more source

Outer spiral structure in disk galaxies

, 2016
In several grand design barred-spiral galaxies it is observed a second, fainter, outer set of spiral arms. Typical examples of objects of this morphology can be considered NGC 1566 and NGC 5248.
P.A. Patsis
core   +1 more source

Impacts of Bar-driven Shear and Shocks on Star Formation

The Astrophysical Journal
Bars drive gas inflow. As the gas flows inward, shocks and shear occur along the bar dust lanes. Such shocks and shear can affect the star formation (SF) and change the gas properties.
Taehyun Kim, Dimitri A. Gadotti, Miguel Querejeta, Isabel Pérez, Almudena Zurita, Justus Neumann, Glenn van de Ven, Jairo Méndez-Abreu, Adriana de Lorenzo-Cáceres, Patricia Sánchez-Blázquez, Francesca Fragkoudi, Lucimara P. Martins, Luiz A. Silva-Lima, Woong-Tae Kim, Myeong-Gu Park   +14 more
doaj   +1 more source

Identification and Analysis of Galactic Bars in DESI Legacy Imaging Surveys

The Astrophysical Journal
We present a comprehensive study of bar structures in the local universe using data from the DESI Legacy Imaging Surveys. Through isophotal analysis of 232,142 galaxies, we identify bars and classify them into strong and weak categories based on ...
Wenwen Wang, Zhimin Zhou
doaj   +1 more source

THE ENVIRONMENT OF BARRED GALAXIES IN THE LOW-REDSHIFT UNIVERSE

, 2014
We present a study of the environment of barred galaxies using a volume-limited sample of over 30,000 galaxies drawn from the Sloan Digital Sky Survey.
Li, Cheng, Wang, Lixin, Lin, Ye, Wang, Enci, Sodi, Bernardo Cervantes   +4 more
core  

Simulations of cosmic ray propagation. [PDF]

Living Rev Comput Astrophys, 2021
Hanasz M, Strong AW, Girichidis P.
europepmc   +1 more source

Do Strong Bars Exhibit Strong Noncircular Motions?

The Astrophysical Journal
Galactic bars induce characteristic motions deviating from pure circular rotation, known as noncircular motions. As bars are nonaxisymmetric structures, stronger bars are expected to show stronger noncircular motions.
Taehyun Kim, Dimitri A. Gadotti, Yun Hee Lee, Carlos López-Cobá, Woong-Tae Kim, Minjin Kim, Myeong-gu Park   +6 more
doaj   +1 more source

Time-dependent resonances in barred galaxies: implications for ring structures and secular evolution

, 2018
Talk delivered May 28 2018, at the Conference on Galactic Rings: Signposts of Secular Evolution in Disk Galaxies - Tuscaloosa, AL, USA Summary: in barred spiral galaxies the interaction bar-spirals produce a time-dependence in the potential that cannot
Pfenniger, Daniel (5490023), Pfenniger, Daniel   +1 more
core   +1 more source

Dissecting Bar-induced Stellar Kinematics in Disk Galaxies: The Bisymmetric Model and Rotation Curve Modifications

The Astrophysical Journal
We analyze bars formed in N -body simulations to investigate two key aspects of stellar kinematic structure of barred galaxies: the angular distributions of the radial and azimuthal components of stellar velocities, and the impact of bars on rotation ...
Seungwon Baek, Woong-Tae Kim, Dajeong Jang, Taehyun Kim   +3 more
doaj   +1 more source