Results 121 to 130 of about 2,636,463 (178)

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

Ionization-induced star formation - IV. Triggering in bound clusters [PDF]

, 2012
We present a detailed study of star formation occurring in bound star-forming clouds under the influence of internal ionizing feedback from massive stars across a spectrum of cloud properties.
Ercolano, B., Dale, J. E., Bonnell, I. A.   +2 more
core   +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

The Answer, My Friend, is Blowing in the Stellar Wind: The Impact of Early Stellar Feedback on the Interstellar Medium

, 2020
The mechanism of stellar feedback -- a star's injection of mass, energy, and momentum into the interstellar medium (ISM) -- not only plays a key role in moderating star formation at the parsec scale, but is also thought to impact galactic mass and ...
Golant, Ryan
core   +2 more sources

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

Formation of the first galaxies under stellar feedback [PDF]

, 2016
The stellar feedback is a crucial ingredient for modeling galaxy formation, especially for the first galaxies, which are susceptible to stellar feedback due to their shallow potential wells.
Jeon, Myoungwon
core   +1 more source

Stellar Feedback in Galaxies and the Origin of Galaxy-scale Winds

, 2011
Feedback from massive stars is believed to play a critical role in driving galactic super‐winds that enrich the intergalactic medium and shape the galaxy mass function, mass–metallicity relation and other global galaxy properties. In previous papers, we have introduced new numerical methods for implementing stellar feedback on sub‐giant molecular cloud
Hopkins, Philip F., Quataert, Eliot, Murray, Norman   +2 more
openaire   +3 more sources

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

Final report on the STELLAR Delphi study: Future directions for TEL and TEL research: areas of tension, core research areas and grand challenge problems

, 2012
In this report on the STELLAR Delphi study, we present the results of the final global survey, that is the 4th STELLAR Delphi round, and illustrate the elaboration and dissemination of these results (5th STELLAR Delphi round).
Spada, Hans, Plesch, Christine, Wiedmann, Michael   +2 more
core   +2 more sources