Results 1 to 10 of about 1,645,813 (249)

Classical novae and type I X-ray bursts: Challenges for the 21st century

open access: yesAIP Advances, 2014
Classical nova explosions and type I X-ray bursts are the most frequent types of thermonuclear stellar explosions in the Galaxy. Both phenomena arise from thermonuclear ignition in the envelopes of accreting compact objects in close binary star systems ...
A. Parikh, J. José, G. Sala
doaj   +1 more source

On the Non-Thermal Energy Content of Cosmic Structures

open access: yesGalaxies, 2016
(1) Background: the budget of non-thermal energy in galaxy clusters is not well constrained, owing to the observational and theoretical difficulties in studying these diluted plasmas on large scales; (2) Method: we use recent cosmological simulations ...
Franco Vazza   +3 more
doaj   +1 more source

Episodic Star Formation. I. Overview and Scatter of the Star-forming Main Sequence

open access: yesThe Astrophysical Journal
There is mounting evidence for episodic star formation cycles in both high- and low-redshift galaxies. This paper aims to understand the detailed physical processes behind such behaviors and investigate how such an episodic star-forming scenario can ...
Yuqian Gui   +6 more
doaj   +1 more source

High-precision Galaxy Clustering Predictions from Small-volume Hydrodynamical Simulations via Control Variates

open access: yesThe Astrophysical Journal
Cosmological simulations of galaxy formation are an invaluable tool for understanding galaxy formation and its impact on cosmological parameter inference from large-scale structures.
Alexandra Doytcheva   +2 more
doaj   +1 more source

Insights into Galaxy Evolution from Interpretable Sparse Feature Networks

open access: yesThe Astrophysical Journal
Galaxy appearances reveal the physics of how they formed and evolved. Machine learning (ML) models can now exploit galaxies’ information-rich morphologies to predict physical properties directly from image cutouts. Learning the relationship between pixel-
John F. Wu
doaj   +1 more source

DiffstarPop: A generative physical model of galaxy star formation history

open access: yesThe Open Journal of Astrophysics
We present DiffstarPop, a differentiable forward model of cosmological populations of galaxy star formation histories (SFH). In the model, individual galaxy SFH is parametrized by Diffstar, which has parameters $θ_{\rm SFH}$ that have a direct ...
Alex Alarcon   +5 more
doaj   +1 more source

Causal Reversal in the M•–σ0 Relation: Implications for High-redshift Supermassive Black Hole Mass Estimates

open access: yesThe Astrophysical Journal
The nascent methodology of applying the principles of causal discovery to astrophysical data has produced affirming results about deeply held theories concerning the causal nature behind the observed coevolution of supermassive black holes (SMBHs) with ...
Benjamin L. Davis   +5 more
doaj   +1 more source

The DREAMS Project: Disentangling the Impact of Halo-to-halo Variance and Baryonic Feedback on Milky Way Satellite Galaxies

open access: yesThe Astrophysical Journal
We analyze the properties of satellite galaxies around 1024 Milky Way–mass hosts from the DREAMS Project, simulated within a ΛCDM cosmology. Utilizing the TNG galaxy-formation model, the DREAMS simulations incorporate both baryonic physics and ...
Jonah C. Rose   +26 more
doaj   +1 more source

The Impact of Void-finding Algorithms on Galaxy Classification

open access: yesThe Astrophysical Journal
We explore how the definition of a void influences the conclusions drawn about the impact of the void environment on galactic properties using two void-finding algorithms in the Void Analysis Software Toolkit: Voronoi Voids ( V ^2 ), a Python ...
Fatima Zaidouni   +3 more
doaj   +1 more source

Where giants dwell: Probing the environments of early massive quiescent galaxies

open access: yesAstronomy & Astrophysics
We investigated the environments of massive quiescent galaxies at 3 ≲ z ≲ 5 using the GAlaxy Evolution and Assembly (GAEA) theoretical model. We selected galaxies with stellar mass above 1010.8 M⊙ and specific star formation rates below 0.3 × t−1 ...
De Lucia Gabriella   +3 more
doaj   +1 more source

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