Results 51 to 60 of about 374,493 (293)
The transition from population III to population II-I star formation [PDF]
Monthly Notices of the Royal Astronomical Society, 2010 We present results from the first cosmological simulations which study the onset of primordial, metal-free (population III), cosmic star formation and the transition to the present-day, metal-rich star formation (population II-I), including molecular (H$_2$, HD, etc.) evolution, tracing the injection of metals by supernov into the surrounding ...
Umberto Maio +4 more
openaire +4 more sources
Some Photometric Characteristics of Population II Orbital Visual Binary Stars
Open Astronomy, 2003 A MV ,B−V diagram for metal-deficient, kinematically selected thick disk and halo visual binary stars with known orbits is presented. The magnitude differences Δm between the components are analyzed.
Bartkevičius A., Gudas A.
doaj +1 more source
, 2017 We investigate the star formation history and chemical evolution of isolated analogues of Local Group (LG) ultra faint dwarf galaxies (UFDs; stellar mass range of 10^2 solar mass < M_star
Besla, Gurtina +2 more
core +1 more source
Cosmic stellar relics in the Galactic halo [PDF]
, 2006 We study the stellar population history and chemical evolution of the Milky Way (MW) in a hierarchical LCDM model for structure formation. Using a Monte Carlo method based on the semi-analytical EPS formalism, we reconstruct the merger tree of our Galaxy
FERRARA A +4 more
core +4 more sources
Pediatric Blood &Cancer, EarlyView.ABSTRACT Arteriovenous malformations (AVMs) are rare, high‐flow, vascular anomalies that can occur either sporadically or as part of a genetic syndrome. AVMs can progress with serious morbidity and even mortality if left unchecked. Sirolimus is an mTOR inhibitor that is effective in low‐flow vascular malformations; however, its role in AVMs is unclear.
Will Swansson +3 more
wiley +1 more source
Astronomy & AstrophysicsGalactic globular clusters (GCs) were born shortly after the Big Bang. For these old stellar systems, the initial mass function (IMF) in the high-mass regime can never be observed directly, because stars more massive than about 1 M⊙ have evolved since ...
Carretta Eugenio
doaj +1 more source
Pediatric Blood &Cancer, EarlyView.ABSTRACT Objective To evaluate the diagnostic yield and utility of universal paired tumor–normal multigene panel sequencing in newly diagnosed pediatric solid and central nervous system (CNS) tumor patients and to compare the detection of germline pathogenic/likely pathogenic variants (PV/LPVs) against established clinical referral criteria for cancer ...
Natalie Waligorski +9 more
wiley +1 more source
Astronomy & AstrophysicsThe FLAMES survey ‘Na-O anti-correlation and HB’ uncovered the modern standard for globular clusters (GCs), which is their ubiquitous multiple stellar populations (MPs) distinguished by the abundance of proton-capture elements.
Carretta Eugenio
doaj +1 more source
Advanced Phases of Evolution of Population II Stars [PDF]
Progress of Theoretical Physics, 1965 As the extension of our previous work, calculations have been made of the evolution of a population II star after the formation of a carbon core. We start from a stage when the star has an inactive hydrogen shell-source, a helium-burning shell-source and a partially degenerate isothermal carbon core.
Chushiro Hayashi +2 more
openaire +1 more source
The Red Giant Branch Tip and Bump of the Leo II dwarf spheroidal galaxy
, 2005 We present V and I photometry of a 9.4' X 9.4' field centered on the dwarf spheroidal galaxy Leo II. The Tip of the Red Giant Branch is identified at I^{TRGB}=17.83 +/- 0.03 and adopting = -1.53 +/- 0.2 from the comparison of RGB stars with Galactic ...
Alard +57 more
core +1 more source