Results 71 to 80 of about 201,594 (302)
The Astrophysical Journal, 2023 We explore the chemodynamical properties of a sample of very metal-poor (VMP) stars selected from the Hamburg/ESO survey, matched with Gaia EDR3, in the phase space identified by the three integrals of motion ( L _z , E , I _3 ). Disk and halo orbits are
Daniela Carollo +3 more
doaj +1 more source
Connecting the First Galaxies with Ultrafaint Dwarfs in the Local Group: Chemical Signatures of Population III Stars [PDF]
, 2017 We investigate the star formation history (SFH) and chemical evolution of isolated analogs of Local Group (LG) ultrafaint dwarf galaxies (UFDs; stellar mass range of ) and gas-rich, low-mass dwarfs (Leo P analogs; stellar mass range of ).
Myoungwon Jeon, G. Besla, V. Bromm
semanticscholar +1 more source
Magnetohydrodynamics of Population III Star Formation [PDF]
AIP Conference Proceedings, 2010 The evolution of collapsing primordial clouds and the formation of Population III (Pop III) protostars are investigated with three‐dimensional ideal MHD simulations. We follow the collapse of parsec‐sized primordial clouds down to the formation of protostars on sub‐AU scales.
Masahiro N. Machida +5 more
openaire +1 more source
The Impact of Patchy Reionization on Ultrafaint Dwarf Galaxies
The Astrophysical Journal, 2023 We investigate how patchy reionization affects the star formation history (SFH) and stellar metallicity of ultrafaint dwarf galaxies (UFDs). Patchy reionization refers to varying ultraviolet background strengths depending on a galaxy’s environment ...
Jaeeun Kim +5 more
doaj +1 more source
Following the Cosmic Evolution of Pristine Gas. III. The Observational Consequences of the Unknown Properties of Population III Stars [PDF]
Astrophysical Journal, 2019 We study the observational consequences of several unknown properties of Population III stars using large-scale cosmological simulations that include a subgrid model to track the unresolved mixing of pollutants.
Richard Sarmento +2 more
semanticscholar +1 more source
Unique signatures of Population III stars in the global 21-cm signal [PDF]
Monthly notices of the Royal Astronomical Society, 2017 Mon. Not. R. Astron. Soc. 000, ??–?? (2016) Printed 28 July 2017 (MN L A TEX style file v2.2) Unique Signatures of Population III Stars in the Global 21-cm Signal Jordan Mirocha 1∗ , Richard Mebane 1 , Steven R.
J. Mirocha +4 more
semanticscholar +1 more source
Modelling population III stars for seminumerical simulations [PDF]
, 2020 Theoretically modelling the 21-cm signals caused by Population III stars (Pop III stars) is the key to extracting fruitful information on Pop III stars from current and forthcoming 21-cm observations. In this work we develop a new module of Pop III stars
Toshiyuki Tanaka, K. Hasegawa
semanticscholar +1 more source
Pediatric Blood &Cancer, EarlyView.ABSTRACT Background Loneliness is associated with adverse physical and mental health outcomes and remains understudied in children and adolescents undergoing cancer therapy. Pediatric oncology patients may be at increased risk due to medical isolation and disruption of social networks.
Charlotte N. Stahlfeld +5 more
wiley +1 more source
Type Ia Supernovae from First-generation Stars
The Astrophysical JournalType Ia supernovae (SNe Ia) discovered at redshift z ≲ 2.5 are presumed to be produced from Population I/II stars. In this work, we investigate the production of SNe Ia from Population III binaries in the cosmological framework.
Zhenwei Li +3 more
doaj +1 more source
The detection of Population III galaxies: Emission line diagnostics for hybrid stellar populations
Astronomy & AstrophysicsContext. Identifying Population III (Pop III) stars, the first generation of metal-free stars in the early Universe, remains a central challenge in astrophysics.
Goswami S. +4 more
doaj +1 more source