Results 121 to 130 of about 2,843,859 (384)
Cosmic evolution of stellar quenching by AGN feedback: clues from the Horizon-AGN simulation [PDF]
, 2017 The observed massive end of the local galaxy stellar mass function is steeper than its predicted dark matter (DM) halo counterpart in the standard $\Lambda $CDM paradigm.
R. Beckmann +11 more
semanticscholar +1 more source
Introduction to stellar evolution
Journal of Physics: Conference Series, 2016 This contribution is meant as a first brief introduction to stellar physics. First I shortly describe the main physical processes active in stellar structures then I summarize the most important features during the stellar life-cycle.
openaire +2 more sources
FEBS Letters, EarlyView.The protonated form of butyrate, as well as other short‐chain fatty acids (SCFAs), is membrane permeable. In acidic extracellular environments, this can lead to intracellular accumulation of SCFAs and cytosolic acidification. This phenomenon will be particularly relevant in acidic environments such as the large intestine or tumor microenvironments ...
Muwei Jiang +2 more
wiley +1 more source
Boron Abundances in Early B Dwarfs of the Galactic Open Cluster NGC 3293
The Astrophysical JournalNew boron abundances or upper limits have been determined for eight early B stars in the young Galactic open cluster NGC 3293, using UV spectra obtained by the Hubble Space Telescope Cosmic Origins Spectrograph.
Charles R. Proffitt +6 more
doaj +1 more source
Stellar population synthesis at the resolution of 2003 [PDF]
, 2003 We present a new model for computing the spectral evolution of stellar populations at ages between 1 x 10 5 and 2 x 10 1 0 yr at a resolution of 3 A across the whole wavelength range from 3200 to 9500 A for a wide range of metallicities.
G. Bruzual, S. Charlot
semanticscholar +1 more source
A stepwise emergence of evolution in the RNA world
FEBS Letters, EarlyView.How did biological evolution emerge from chemical reactions? This perspective proposes a gradual scenario of self‐organization among RNA molecules, where catalytic feedback on random mixtures plays the central role. Short oligomers cross‐ligate, and self‐assembly enables heritable variations. An event of template‐externalization marks the transition to
Philippe Nghe
wiley +1 more source
A Semi-analytical Model for Stellar Evolution in AGN Disks
The Astrophysical JournalDisks of gas accreting onto supermassive black holes may host numerous stellar-mass objects, formed within the disk or captured from a nuclear star cluster.
Alexander J. Dittmann, Matteo Cantiello
doaj +1 more source
Testing stellar evolution models with detached eclipsing binaries
, 2017 Stellar evolution codes, as all other numerical tools, need to be verified. One of the standard stellar objects that allow stringent tests of stellar evolution theory and models, are detached eclipsing binaries.
J. Higl, A. Weiss
semanticscholar +1 more source
Comprehensive analytic formulae for stellar evolution as a function of mass and metallicity [PDF]
, 2000 We present analytic formulae that approximate the evolution of stars for a wide range of mass M and metallicity Z. Stellar luminosity, radius and core mass are given as a function of age, M and Z, for all phases from the zero-age main sequence up to, and
J. Hurley, O. Pols, C. Tout
semanticscholar +1 more source
Stellar evolution and stellar populations
, 2019 I will overview how the theory of stellar evolution and stellar populations evolved to explain the rich features observed in large surveys of the Magellanic Clouds -- going from subtle features in colour-magnitude diagrams to striking sequences in period-magnitude diagrams.
openaire +3 more sources