Results 71 to 80 of about 301,814 (290)
, 2017 The search for metal-free stars has so far been unsuccessful, proving that if there are surviving stars from the first generation, they are rare, they have been polluted, or we have been looking in the wrong place.
Agarwal, Bhaskar +6 more
core +2 more sources
How the First Stars Regulated Star Formation. II. Enrichment by Nearby Supernovae [PDF]
, 2017 Metals from Population III (Pop III) supernovae led to the formation of less massive Pop II stars in the early universe, altering the course of evolution of primeval galaxies and cosmological reionization.
Chen, Ke-Jung +4 more
core +2 more sources
Disc fragmentation and the formation of Population III stars [PDF]
Monthly Notices of the Royal Astronomical Society, 2015 Our understanding of population III star formation is still in its infancy. They are formed in dark matter minihalos of $\rm 10^5-10^6 M_{\odot}$ at $z=20-30$. Recent high resolution cosmological simulations show that a protostellar disk forms as a consequence of gravitational collapse and fragments into multiple clumps.
Latif, M. ~A. +1 more
openaire +4 more sources
Pediatric Blood &Cancer, EarlyView.ABSTRACT Background Families of children with cancer experience significant financial strain, even with universal healthcare. Indirect costs, such as productivity losses and non‐medical expenses, are rarely included in economic evaluations, and little is known about how effectively financial aid programmes alleviate this burden. Childhood brain tumours
Megumi Lim +8 more
wiley +1 more source
How Population III Supernovae Determined the Properties of the First Galaxies
The Astrophysical JournalMassive Population III stars can die as energetic supernovae that enrich the early Universe with metals and determine the properties of the first galaxies.
Ke-Jung Chen +6 more
doaj +1 more source
Carbon measurements in two ultra-faint dwarf galaxies: Grus II and Tucana IV
Astronomy & AstrophysicsThe ultra-faint dwarf galaxies (UFDs) are some of the oldest and most metal-poor environments in the Local Group. In particular, they are predicted to host the first stars (only H and He) that lit up in our Universe.
Verdiani Valentina +9 more
doaj +1 more source
First Stars III Conference Summary
, 2008 The understanding of the formation, life, and death of Population III stars, as well as the impact that these objects had on later generations of structure formation, is one of the foremost issues in modern cosmological research and has been an active ...
Abel, Tom +3 more
core +1 more source
PopIII signatures in the spectra of PopII/I GRBs [PDF]
, 2015 We investigate signatures of population III (PopIII) stars in the metal-enriched environment of GRBs originating from population II-I (PopII/I) stars by using abundance ratios derived from numerical simulations that follow stellar evolution and chemical ...
Ciardi, B. +3 more
core +2 more sources
Populations of rotating stars [PDF]
Astronomy & Astrophysics, 2014 16 pages, 16 figures, accepted for publication in A& ...
Georgy +8 more
openaire +3 more sources
Pediatric Blood &Cancer, EarlyView.ABSTRACT Background The management of clinically apparent single lesions or oligofocal nephroblastomatosis, a facultative precursor of nephroblastoma, remains debated. Methods We retrospectively analyzed 37 patients with clinically apparent single or oligofocal nephroblastomatosis (two to three lesions per kidney) among 2347 patients registered between
Nils Welter +17 more
wiley +1 more source