Results 71 to 80 of about 373,456 (271)

The First Galaxies: Chemical Enrichment, Mixing, and Star Formation

, 2010
Using three-dimensional cosmological simulations, we study the assembly process of one of the first galaxies, with a total mass of 10^8 M_sun, collapsing at z = 10.
Abrahamsson, Ahn, Alvarez, Alvarez, Barkana, Boley, Bromm, Bromm, Cen, Cherchneff, Clark, Clark, Dijkstra, Frebel, Frebel, Glover, Greif, Haiman, Haiman, Heger, Helmi, Jappsen, Jappsen, Jappsen, Johnson, Karlsson, Kudritzki, Mackey, Madau, McKee, Monaghan, Navarro, Nozawa, Omukai, O’Shea, O’Shea, O’Shea, Puzia, Ralf S. Klessen, Santoro, Schaye, Shen, Simon C. O. Glover, Spergel, Thomas H. Greif, Tormen, Tumlinson, Volker Bromm, Whalen, Whalen, Whalen, Whalen, Wise, Wise, Yoshida, Yoshida   +55 more
core   +1 more source

Characterizing Parental Concerns About Lasting Impacts of Treatment in Children With B‐Acute Lymphoblastic Leukemia

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Background B‐acute lymphoblastic leukemia (B‐ALL) is the most common pediatric cancer, and while most children in high‐resource settings are cured, therapy carries risks for long‐term toxicities. Understanding parents’ concerns about these late effects is essential to guide anticipatory support and inform evolving therapeutic approaches ...
Kellee N. Parker, Sarah W. Alexander, Lisa M. Jacola, Kimberly A. Buff, Kyobin Hwang, Elham Hashemi, Gregory Stoddard, Lindsay A. Jibb   +7 more
wiley   +1 more source

Discovery of an [Fe/H] ∼ −4.8 Star in Gaia XP Spectra

The Astrophysical Journal Letters
We report on the discovery of GDR3_526285 (Gaia DR3 Source ID 5262850721755411072), a star with [Fe/H] = −4.82 ± 0.25 and one of the lowest metal (atomic number > 2) mass fractions ever found ( Z _GDR3 _ _526585  ≲ 1.0 × 10 ^−6 ).
Guilherme Limberg, Vinicius M. Placco, Alexander P. Ji, Yupeng Yao, Anirudh Chiti, Mohammad K. Mardini, Anna Frebel, Silvia Rossi   +7 more
doaj   +1 more source

Synthetic properties of bright metal-poor variables. II. BL Her stars

, 2007
We investigate the properties of the so-called BL Her stars, i.e., Population II Cepheids with periods shorter than 8 days, using updated pulsation models and evolutionary tracks computed adopting a metal abundance in the range of Z=0.0001 to Z=0.004. We
Bessell, Bono, Bono, Bono, Bono, Bono, Buchler, Buchler, Caldwell, Caputo, Caputo, Caputo, Cardelli, Carpenter, Cassisi, Cassisi, Dean, Del Principe, Del Principe, Di Criscienzo, Di Criscienzo, F. Caputo, Fiorentino, Gingold, Harris, Harris, Kubiak, Laney, M. Di Criscienzo, M. Marconi, Madore, Madore, Marconi, Marconi, Marconi, Matsunaga, McNamara, Nemec, Pietrinferni, Pietrinferni, Pritzl, Recio-Blanco, Riello, S. Cassisi, Salaris, Sandage, Sandage, Stellingwerf, Tuggle, Wallerstein, Wallerstein, Wallerstein   +51 more
core   +1 more source

Exercise Interventions in Children, Adolescents and Young Adults With Paediatric Bone Tumours—A Systematic Review

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Bone tumours present significant challenges for affected patients, as multimodal therapy often leads to prolonged physical limitations. This is particularly critical during childhood and adolescence, as it can negatively impact physiological development and psychosocial resilience.
Jennifer Queisser, Claire Laurie, Teresa Schmidt, Irene von Luettichau, Peter Bekkering, Sabine Kesting   +5 more
wiley   +1 more source

SDSS J0018-0939: A Clear Signature of Sub-Chandrasekhar Mass Type 1a Supernova

The Astrophysical Journal
Very metal-poor (VMP) stars ([Fe/H] ≤ −2) that have subsolar values of [X/Fe] for α elements such as Mg, Si, and Ca, are referred to as α -poor VMP stars.
S. K. Jeena, Projjwal Banerjee
doaj   +1 more source

Fossil Merger of a Population II Star

The Astrophysical Journal, 2018
Abstract We report on a fossil stellar merger for the subgiant primary of the visual binary HR 3750. The subgiant leads to an age τ ≃ 3.2 Gyr for a mass M A = 1.39 ± 0.09 M ⊙, in contradiction with its low iron-to-magnesium abundance that classifies it as a Population II (thick-disk) star.
Klaus Fuhrmann, Rolf Chini
openaire   +1 more source

The HST Large Program on Omega Centauri. I. Multiple stellar populations at the bottom of the main sequence probed in NIR-Optical

, 2017
As part of a large investigation with Hubble Space Telescope to study the faintest stars within the globular cluster Omega Centauri, in this work we present early results on the multiplicity of its main sequence (MS) stars, based on deep optical and near-
Anderson, J., Apai, D., Bedin, L. R., Bellini, A., Bergeron, P., Burgasser, A. J., Dotter, A., Marino, A. F., Milone, A. P., Rees, J. M.   +9 more
core   +1 more source

DELP Treatment on Vision and Retinal Microcirculation in Patients With Acute Ischemic Stroke: Report of Five Cases and Literature Review

Therapeutic Apheresis and Dialysis, EarlyView.
ABSTRACT Background The delipid extracorporeal lipoprotein filter from plasma (DELP) treatment can effectively reduce blood lipid, increase blood flow, and improve neurological deficits in patients with acute ischemic stroke (AIS). However, its effect on vision and retinal microcirculation in stroke patients has never been reported.
Ning Li, Ronghua Hong, Hua You, Feiping Xu, Qingjun Zhang, Yiwen Lin, Yuting Su, Danmei Lan, Lingjing Jin, Junhui She   +9 more
wiley   +1 more source

The kinematics of Population II stars

The Astrophysical Journal, 1985
Simple dynamical models are made to study the implications of recent kinematic data for Population II stars in the Galactic halo. The models assume a scale-free distribution of stars orbiting within a spherical potential with a flat rotation curve. This potential is consistent with the observed properties of the globular cluster system.
openaire   +1 more source