Results 1 to 10 of about 1,238,105 (253)

Stellar feedback and triggered star formation in the prototypical bubble RCW 120. [PDF]

Sci Adv, 2021
Luisi M, Anderson LD, Schneider N, Simon R, Kabanovic S, Güsten R, Zavagno A, Broos PS, Buchbender C, Guevara C, Jacobs K, Justen M, Klein B, Linville D, Röllig M, Russeil D, Stutzki J, Tiwari M, Townsley LK, Tielens AGGM.   +19 more
europepmc   +1 more source

Bursty Star Formation in Dwarfs is Sensitive to Numerical Choices in Supernova Feedback Models

The Astrophysical Journal
Simulations of galaxy formation are mostly unable to resolve the energy-conserving phase of individual supernova events, having to resort to subgrid models to distribute the energy and momentum resulting from stellar feedback.
Eric Zhang, Laura V. Sales, Federico Marinacci, Paul Torrey, Mark Vogelsberger, Volker Springel, Hui Li, Rüdiger Pakmor, Thales A. Gutcke   +8 more
doaj   +1 more source

A Strong Stellar Age–Metallicity Gradient Relation in Nearby Dwarf Galaxies Driven by Stellar Migration and Environmental Quenching

The Astrophysical Journal Letters
Stellar metallicity gradients (∇[ Z / H ]) provide a fossil record of the assembly history of galaxies. We present an analysis of ∇[ Z / H ] for 90 nearby low-mass galaxies using Very Large Array (VLT)/MUSE integral field unit (IFU) spectroscopy ...
Tie Li, Hong-Xin Zhang, Wenhe Lyu, Weibin Sun, Bojun Tao, Weiyu Ding, Xu Kong, Guangwen Chen, Jianhui, Lian, Yong Shi, Fuyan Bian, Xin Li, Xiaoling Yu, Zhiyuan Zheng, Yanmei Chen, Qiusheng Gu, Junfeng Wang, Shude Mao, Kai Zhu   +18 more
doaj   +1 more source

Metallicity Gradients in Modern Cosmological Simulations. I. Tension between Smooth Stellar Feedback Models and Observations

The Astrophysical Journal
The metallicity of galaxies, and its variation with galactocentric radius, provides key insights into the formation histories of galaxies and the physical processes driving their evolution.
Alex M. Garcia, Paul Torrey, Aniket Bhagwat, Ruby J. Wright, Qian-Hui Chen, Kathryn Grasha, Sophia Ridolfo, Z. S. Hemler, Arnab Sarkar, Priyanka Chakraborty, Erica J. Nelson, Ryan L. Sanders, Tiago Costa, Mark Vogelsberger, Lisa J. Kewley, Sara L. Ellison, Lars Hernquist   +16 more
doaj   +1 more source

The Impact of Positive AGN Feedback on the Properties of Galaxies in a Semianalytic Model of Galaxy Formation

The Astrophysical Journal Supplement Series
We introduce the state-of-the-art semianalytic model Formation and Evolution of GAlaxies (FEGA), which incorporates updated prescriptions for key physical processes in galaxy formation.
Emanuele Contini, Sukyoung K. Yi, Seyoung Jeon, Jinsu Rhee   +3 more
doaj   +1 more source

A MARVEL-ous Study of How Well Galaxy Shapes Reflect Dark Matter Halo Shapes in Cold Dark Matter Simulations

The Astrophysical Journal
We present a 3D shape analysis of both dark matter (DM) and stellar matter (SM) in simulated dwarf galaxies to determine whether stellar shape traces DM shape. Using 80 central and satellite dwarf galaxies from three simulation suites (“Marvelous Massive
Blake Keith, Ferah Munshi, Alyson M. Brooks, Jordan Van Nest, Anna Engelhardt, Akaxia Cruz, Ben Keller, Thomas Quinn, James Wadsley   +8 more
doaj   +1 more source

The stellar-to-halo mass relation of central galaxies across three orders of halo mass

Astronomy & Astrophysics
The stellar content of galaxies is tightly connected to the mass and growth of their host dark matter halos. Observational constraints on this relation remain limited, particularly for low-mass groups, leaving uncertainties in how galaxies assemble their
Toptun Victoria, Popesso Paola, Marini Ilaria, Vladutescu-Zopp Stephan, Dolag Klaus, Behroozi Peter, Lovisari Lorenzo, Ettori Stefano, Biffi Veronica, Yang Xiaohu, de Isídio Natanael, Mazengo Daudi T.   +11 more
doaj   +1 more source

Why Do Semianalytic Models Predict Higher Scatter in the Stellar Mass–Halo Mass Relation Than Cosmological Hydrodynamic Simulations?

The Astrophysical Journal
Semianalytic models (SAMs) systematically predict higher-stellar mass scatter at a given halo mass than hydrodynamical simulations and most empirical models. Our goal is to investigate the physical origin of this scatter by exploring modifications to the
Antonio J. Porras-Valverde, John C. Forbes, Rachel S. Somerville, Adam R. H. Stevens, Kelly Holley-Bockelmann, Andreas A. Berlind, Shy Genel   +6 more
doaj   +1 more source

Exploring the Evolution of a Dwarf Spheroidal Galaxy with SPH Simulations. II. AGN Feedback

The Astrophysical Journal
We investigate active galactic nucleus (AGN) feedback from an intermediate-mass black hole at the center of a dwarf spheroidal galaxy, by performing isolated galaxy simulations using a modified version of the GADGET-3 code. We consider Leo II (PGC 34176)
Roberto Hazenfratz, Paramita Barai, Gustavo A. Lanfranchi, Anderson Caproni   +3 more
doaj   +1 more source

Stellar Evolution with Radiative Feedback in AGN Disks

The Astrophysical Journal
Stars embedded in the inner parsec region of an active galactic nucleus (AGN) experience extreme accretion conditions that significantly alter their evolution.
Zheng-Hao Xu, Yi-Xian Chen, Douglas N. C. Lin   +2 more
doaj   +1 more source