Results 51 to 60 of about 239,741 (340)
An In-depth Investigation of the Primordial Cluster Pair ASCC 19 and ASCC 21
The Astronomical JournalUtilizing Gaia data from the literature, we report a new young (∼8.9 Myr) cluster pair, ASCC 19 and ASCC 21, located near the Orion star-forming complex. The clusters are separated by a 3D distance of 27.00 ± 7.51 pc.
Qingshun Hu +6 more
doaj +1 more source
A Study of Stellar Spins in 15 Open Clusters
The Astrophysical Journal, 2023 We analyze spectroscopic and photometric data to determine the projected inclinations of stars in 11 open clusters, placing constraints on the spin-axis distributions of six clusters.
Brian F. Healy +3 more
doaj +1 more source
Star and Cluster Formation in the Large Magellanic Cloud [PDF]
, 1998 A great burst of cluster formation increased the rate at which open clusters were formed in the Large Magellanic Cloud 3-5 Gyr ago by at least an order of magnitude.
Den Bergh, Sidney Van
core +3 more sources
Pediatric Blood &Cancer, EarlyView.ABSTRACT Objectives To identify predictors of chronic ITP (cITP) and to develop a model based on several machine learning (ML) methods to estimate the individual risk of chronicity at the timepoint of diagnosis. Methods We analyzed a longitudinal cohort of 944 children enrolled in the Intercontinental Cooperative immune thrombocytopenia (ITP) Study ...
Severin Kasser +6 more
wiley +1 more source
Open Cluster Study Using Gaia. I. Membership and Cluster Properties
The Astrophysical JournalStar clusters are interesting laboratories to study star formation, single and binary stellar evolution, and stellar dynamics. We have used the exquisite data from Gaia’s Data Release 3 (DR3) to study 21 relatively rich and nearby open clusters with ...
Anindya Ganguly +2 more
doaj +1 more source
On the disc and halo of the milky way through a study of star clusters [PDF]
Serbian Astronomical Journal, 2000 The subject is the metallicity and the correlation between the metallicity and spatial distribution of star clusters of the Milky Way. The open star clusters are confirmed as good indicators for the population of the galactic disc, whereas the globular ...
Nagl M.
doaj +1 more source
Young and intermediate-age massive star clusters
, 2009 An overview of our current understanding of the formation and evolution of star clusters is given, with main emphasis on high-mass clusters. Clusters form deeply embedded within dense clouds of molecular gas. Left-over gas is cleared within a few million
Girardi L. +9 more
core +1 more source
THE SPATIAL DISTRIBUTION OF STARS IN OPEN CLUSTERS [PDF]
The Astrophysical Journal, 2009 AbstractWe study the internal spatial structure of 16 open clusters in the Milky Way spanning a wide range of ages. For this, we use the minimum-spanning-tree method (the Q parameter, which enables one to classify the stellar distribution as either radially or fractally clustered), King-profile fitting, and the correlation dimension (Dc) for those ...
Sanchez, Nestor, Alfaro, Emilio J.
openaire +4 more sources
Revealing the structure of land plant photosystem II: the journey from negative‐stain EM to cryo‐EM
FEBS Letters, EarlyView.Advances in cryo‐EM have revealed the detailed structure of Photosystem II, a key protein complex driving photosynthesis. This review traces the journey from early low‐resolution images to high‐resolution models, highlighting how these discoveries deepen our understanding of light harvesting and energy conversion in plants.
Roman Kouřil
wiley +1 more source
The Astrophysical JournalMost of the dynamical mass loss from star clusters is thought to be caused by the time variability of the tidal field (“tidal shocks”). Systematic studies of tidal shocks have been hampered by the fact that each tidal history is unique, implying both a ...
Jeremy J. Webb +2 more
doaj +1 more source