Results 51 to 60 of about 95,404 (302)
The Astrophysical Journal Supplement SeriesStellar age determination for large samples of stars opens new avenues for a broad range of astronomical sciences. While precise stellar ages for evolved stars have been derived from large ground- and space-based stellar surveys, reliable age ...
Jia-Hui Wang +7 more
doaj +1 more source
A Spitzer view of protoplanetary disks in the gamma Velorum cluster [PDF]
, 2008 We present new Spitzer Space Telescope observations of stars in the young ~5 Myr gamma Velorum stellar cluster. Combining optical and 2MASS photometry, we have selected 579 stars as candidate members of the cluster.
Baraffe I. +13 more
core +2 more sources
Mapping the evolution of mitochondrial complex I through structural variation
FEBS Letters, EarlyView.Respiratory complex I (CI) is crucial for bioenergetic metabolism in many prokaryotes and eukaryotes. It is composed of a conserved set of core subunits and additional accessory subunits that vary depending on the organism. Here, we categorize CI subunits from available structures to map the evolution of CI across eukaryotes. Respiratory complex I (CI)
Dong‐Woo Shin +2 more
wiley +1 more source
ChronoFlow: A Data-driven Model for Gyrochronology
The Astrophysical JournalGyrochronology is a technique for constraining stellar ages using rotation periods, which change over a star’s main-sequence (MS) lifetime due to magnetic braking. This technique shows promise for MS FGKM stars, where other methods are imprecise. However,
Phil R. Van-Lane +7 more
doaj +1 more source
Stellar Rotation and Structure of the α Persei Complex: When Does Gyrochronology Start to Work?
The Astronomical Journal, 2023 On the pre-main sequence, the rotation rates of Sun-like stars are dictated by the interplay between the protostellar disk and the star’s contraction. At ages exceeding 100 Myr, magnetic spindown erases the initial stellar spin rate and enables rotation ...
Andrew W. Boyle, Luke G. Bouma
doaj +1 more source
Constraining Co-Varying Coupling Constants from Globular Cluster Age
Universe, 2023 Equations governing the evolution of a star involve multiple coupling constants. Thus, the time it spends as a main-sequence star can be expected to depend on whether or not such constants vary over the time scale of stellar evolution.
Rajendra P. Gupta
doaj +1 more source
Integrated spectral energy distributions of binary star composite stellar populations
, 2012 This paper presents theoretical integrated spectral energy distributions (SEDs) of binary star composite stellar populations (bsCSPs) in early-type galaxies, and how the bsCSP model can be used for spectral studies of galaxies.
Belkus +45 more
core +1 more source
Filamentary Star Formation in NGC 1275 [PDF]
, 2014 We examine the star formation in the outer halo of NGC~1275, the central galaxy in the Perseus cluster (Abell 426), using far ultraviolet and optical images obtained with the Hubble Space Telescope.
Canning, R. E. A +10 more
core +2 more sources
FEBS Letters, EarlyView.Enteropathogenic E. coli (EPEC) infects the human intestinal epithelium, resulting in severe illness and diarrhoea. In this study, we compared the infection of cancer‐derived cell lines with human organoid‐derived models of the small intestine. We observed a delayed in attachment, inflammation and cell death on primary cells, indicating that host ...
Mastura Neyazi +5 more
wiley +1 more source
Age-luminosity relations for low-mass metal-poor stars [PDF]
, 1999 We present a grid of evolutionary calculations for metal-poor low-mass stars for a variety of initial helium and metal abundances. The intention is mainly to provide a database for deriving directly stellar ages of halo and globular cluster stars for ...
Schlattl, Helmut, Weiss, Achim
core +2 more sources