Results 71 to 80 of about 5,593,868 (306)
Simulations of Interacting Binary Systems—Pathways to Radio-bright Gamma-Ray Burst Progenitors
The Astrophysical JournalAlthough the association of gamma-ray bursts (GRBs) with massive stellar death is on firm footing, the nature of the progenitor system and the key ingredients required for a massive star to produce a GRB remain open questions.
Angel Hernandez +3 more
doaj +1 more source
From mice to humans—divergent strategies for intestinal homeostasis and regeneration
FEBS Letters, EarlyView.Recent advances such as organoid genome editing, xenotransplantation, imaging, and whole‐genome sequencing have enabled direct studies of human intestinal stem cells (ISCs). These studies reveal species‐specific features, including slower ISC proliferation, distinct injury responses, slower somatic mutation accumulation in humans, and an inverse ...
Keiko Ishikawa +2 more
wiley +1 more source
The fate of Earth during the Sun’s giant phases
Astronomy & AstrophysicsContext. The long-term evolution of planetary systems around solar-type stars is governed by the interplay between stellar expansion, tidal interactions, and mass loss during the red giant branch (RGB) and asymptotic giant branch (AGB) phases.
Esseldeurs M., Mathis S., Decin L.
doaj +1 more source
The Astrophysical Journal, 2023 The Hubble Space Telescope (HST)/Space Telescope Imaging Spectrograph treasury program Advanced Spectral Library enables investigations of the characteristics and dynamics of the wind and chromosphere of cool stars using high-quality spectral data.
Krister E. Nielsen +3 more
doaj +1 more source
Stellar winds and mass-loss rates from Be stars [PDF]
The Astrophysical Journal, 1981 Resonance-line profiles of SiIII and SiIV lines in 22 B and Be stars have been analyzed in the derivation of mass-loss rates. Of the 19 known Be or shell stars in the sample group, all but one show evidence of winds. It is argued that for stars of spectral type B1.5 and later, SiIII and SiIV are the dominant stages of ionization, and this conclusion ...
openaire +1 more source
Stellar mass loss from the Fornax dwarf spheroidal galaxy [PDF]
, 2022 Dwarf galaxies often experience gravitational interactions from more massive companions. These interactions can deform galaxies, turn star formation on or off, or give rise to mass loss phenomena. In this thesis work we propose to study, through N-body
Cantari, Marcello
core
Design and analysis strategies for robust microbiome ageing research
FEBS Letters, EarlyView.The gut microbiome changes with age and associates with age‐related morbidity and mortality, establishing it as a potential biomarker and intervention target for ageing. Realising this potential requires methodological rigour, yet distinguishing biological signals from methodological artefacts remains challenging across cohorts. This review provides an
Mark Olenik +5 more
wiley +1 more source
A study of U Aquarii and the nucleosynthesis of neutrons and S-process elements in evolved stars of low mass [PDF]
, 2014 The origin of the extreme hydrogen deficiency observed in the R Coronae Borealis (RCrB) stars remains poorly understood. A likely mechanism for producing this deficiency is one whereby the original hydrogen envelope of the star is engulfed and ...
Malaney, Robert A.
core +2 more sources
Fine-tuned Supernova or Failed Explosion? Decoding the Origins of the G3425 Binary
The Astrophysical Journal LettersA binary system (G3425) consisting of a massive unseen component and a red giant star on a nearly circular orbit was recently discovered. The formation of such a system is puzzling because orbital stability generally breaks down due to the large mass ...
Zsolt Regály +2 more
doaj +1 more source
Some comments on empirical FITS to stellar mass loss rates [PDF]
, 1987 Two empirical fits to stellar mass loss rates have been examined and found lacking in physical ...
Vardya, M. S.
core +1 more source