Results 71 to 80 of about 40,993 (207)

Dynamical Consequence of Shadows Cast to the Outer Protoplanetary Disks. I. Two-dimensional Simulations

The Astrophysical Journal
There has been increasing evidence of shadows from scattered light observations of outer protoplanetary disks (PPDs) cast from the (unresolved) disk inner region, while in the meantime these disks present substructures of various kinds in the ...
Zehao Su, Xue-Ning Bai
doaj   +1 more source

Three-dimensional magnetohydrodynamical simulations of the morphology of head-tail radio galaxies based on magnetic tower jet model

, 2017
The distinctive morphology of head-tail radio galaxies reveals strong interactions between the radio jets and their intra-cluster environment, the general consensus on the morphology origin of head-tail sources is that radio jets are bent by violent ...
Gan, Zhaoming, Li, Hui, Li, Shengtai, Yuan, Feng   +3 more
core   +1 more source

The GHOSDT Simulations. II. Missing H2 in Simulations of a Self-regulated Interstellar Medium

The Astrophysical Journal
Observations in the Galaxy and nearby spirals have established that the H i -to-H _2 transition at solar metallicity occurs at gas weight of P _DE / k _B ≈ 10 ^4 K cm ^−3 , similar to solar neighborhood conditions.
Alon Gurman, Chia-Yu Hu, Michael Y. Grudić, Ulrich P. Steinwandel, Amiel Sternberg   +4 more
doaj   +1 more source

Robust Field-level Likelihood-free Inference with Galaxies

The Astrophysical Journal, 2023
We train graph neural networks to perform field-level likelihood-free inference using galaxy catalogs from state-of-the-art hydrodynamic simulations of the CAMELS project.
Natalí S. M. de Santi, Helen Shao, Francisco Villaescusa-Navarro, L. Raul Abramo, Romain Teyssier, Pablo Villanueva-Domingo, Yueying Ni, Daniel Anglés-Alcázar, Shy Genel, Elena Hernández-Martínez, Ulrich P. Steinwandel, Christopher C. Lovell, Klaus Dolag, Tiago Castro, Mark Vogelsberger   +14 more
doaj   +1 more source

Hydrodynamical Simulations of the Barred Spiral Galaxy NGC 1097

, 2013
NGC 1097 is a nearby barred spiral galaxy believed to be interacting with the elliptical galaxy NGC 1097A located to its northwest. It hosts a Seyfert 1 nucleus surrounded by a circumnuclear starburst ring.
Hsieh, Pei-Ying, Lin, Lien-Hsuan, Taam, Ronald E., Wang, Hsiang-Hsu, Yang, Chao-Chin, Yen, David C. C.   +5 more
core   +1 more source

The Multicomponent Fitting to the Star Formation Histories in the TNG Simulation

The Astrophysical Journal
The star formation history (SFH) is a key issue in the evolution of galaxies. In this work, we developed a model based on a Gaussian and gamma function mixture to fit SFHs with varying numbers of components. Our primary objective was to use this model to
Yang Wang, Chenxing Dong, Hengxin Ruan, Qiufan Lin, Yucheng Zhang, Shupei Chen   +5 more
doaj   +1 more source

The Shape-velocity Alignment of Satellites Forged by Tidal Locking and Dynamical Friction

The Astrophysical Journal
Utilizing the TNG50 simulation, we study two types of alignments for satellites/subhalos: (1) the alignment of their major axes with the galactocentric radial directions (radial alignment), and (2) with the motion directions (orbital alignment).
Hao Yang, Wenting Wang, Ting S. Li, Sergey E. Koposov, Jiaxin Han, Feihong He, Zhaozhou Li, Zhongxu Zhai, Binbin Gao, Carles G. Palau, Zhenlin Tan   +10 more
doaj   +1 more source

Hydrodynamical simulations of a compact source scenario for G2

, 2013
The origin of the dense gas cloud G2 discovered in the Galactic Center (Gillessen et al. 2012) is still a debated puzzle. G2 might be a diffuse cloud or the result of an outflow from an invisible star embedded in it.
Ballone, A., Burkert, A., Eisenhauer, F., Fritz, T. K., Genzel, R., Gillessen, S., Ott, T., Pfuhl, O., Schartmann, M.   +8 more
core   +1 more source

Circumbinary Planet Formation in the Kepler-16 System. II. A Toy Model for In-situ Planet Formation within a Debris Belt [PDF]

, 2014
Recent simulations have shown that the formation of planets in circumbinary configurations (such as those recently discovered by Kepler) is dramatically hindered at the planetesimal accretion stage.
Meschiari, Stefano
core   +2 more sources

Self-Consistent Modeling of Reionization in Cosmological Hydrodynamical Simulations

, 2017
The ultraviolet background (UVB) emitted by quasars and galaxies governs the ionization and thermal state of the intergalactic medium (IGM), regulates the formation of high-redshift galaxies, and is thus a key quantity for modeling cosmic reionization ...
Hennawi, Joseph F, Lukić, Zarija, Oñorbe, Jose   +2 more
core   +1 more source