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The Role of Stellar Feedback in the Dynamics of HII Regions [PDF]
The Astrophysical Journal, 2013 Stellar feedback is often cited as the biggest uncertainty in galaxy formation models today. This uncertainty stems from a dearth of observational constraints as well as the great dynamic range between the small scales (1 kpc) that are shaped by this ...
Bolatto, Alberto D. +5 more
core +5 more sources
On the interplay between star formation and feedback in galaxy formation simulations [PDF]
, 2014 We investigate the star formation-feedback cycle in cosmological galaxy formation simulations, focusing on progenitors of Milky Way (MW)-sized galaxies. We find that in order to reproduce key properties of the MW progenitors, such as semi-empirically derived star formation histories and the shape of rotation curves, our implementation of star formation
Agertz, Oscar, Kravtsov, Andrey V.
arxiv +3 more sources
The Astrophysical JournalA fundamental question regarding the evolution of dwarf spheroidal galaxies is the identification of the key physical mechanisms responsible for gas depletion.
Roberto Hazenfratz +3 more
doaj +2 more sources
Stellar Population and Energy Feedback in the Supergiant Shell LMC 1
The Astronomical JournalSupergiant shells (SGSs) are the largest interstellar structures in galaxies and inject hot enriched gas into galactic halos. We have studied SGS LMC 1 to determine quantitatively whether stellar energy feedback is adequate to power the formation of an ...
Guan-Hong Li +6 more
doaj +2 more sources
The Astrophysical JournalOne of the fundamental questions of cosmology is the origin and mechanism(s) responsible for the reionization of the Universe beyond z ∼ 6. Many studies have focused on Hubble Space Telescope (HST) Cosmic Origins Spectrograph (COS) observations of local
Sophia R. Flury +32 more
doaj +2 more sources
Invertible Neural Networks in Astrophysics [PDF]
EPJ Web of Conferences, 2022 Modern machine learning techniques have become indispensable in many fields of astronomy and astrophysics. Here we introduce a specific class of methods, invertible neural networks, and discuss two specific applications, the prediction of stellar ...
Klessen Ralf S.
doaj +1 more source
Evolution of Stellar Feedback in H ii Regions [PDF]
The Astrophysical Journal, 2021 Abstract Stellar feedback is needed to produce realistic giant molecular clouds and galaxies in simulations, but due to limited numerical resolution, feedback must be implemented using sub-grid models. Observational work is an important means to test and anchor these models, but limited studies have assessed the relative dynamical role ...
Grace M. Olivier +6 more
openaire +4 more sources
Stellar feedback in a clumpy galaxy at z ∼ 3.4 [PDF]
Monthly Notices of the Royal Astronomical Society, 2021 ABSTRACT Giant star-forming regions (clumps) are widespread features of galaxies at z ≈ 1−4. Theory predicts that they can play a crucial role in galaxy evolution, if they survive to stellar feedback for >50 Myr. Numerical simulations show that clumps’ survival depends on the stellar feedback recipes that are adopted.
A. Zanella +25 more
openaire +7 more sources
The Astronomical Journal, 2023 We explore the role of galactic feedback on the low-redshift Ly α (Ly α ) forest ( z ≲ 2) statistics and its potential to alter the thermal state of the intergalactic medium. Using the Cosmology and Astrophysics with Machine Learning Simulations (CAMELS)
Megan Taylor Tillman +11 more
doaj +1 more source
Stellar feedback efficiencies: supernovae versus stellar winds [PDF]
Monthly Notices of the Royal Astronomical Society, 2015 Stellar winds and supernova (SN) explosions of massive stars ('stellar feedback') create bubbles in the interstellar medium (ISM) and insert newly produced heavy elements and kinetic energy into their surroundings, possibly driving turbulence. Most of this energy is thermalized and immediately removed from the ISM by radiative cooling.
Marc Schartmann +8 more
openaire +5 more sources