Results 51 to 60 of about 8,488 (185)
Red supergiants and stellar evolution
, 2013 We review the significant role played by red supergiants (RSGs) in stellar populations, and some challenges and questions they raise for theoretical stellar evolution. We present how metallicity and rotation modify the way stars go to the red part of the
Ekström, Sylvia +4 more
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Evolutionary states of red-giant stars from grid-based modelling
EPJ Web of Conferences, 2017 From its surface properties it can be difficult to determine whether a red-giant star is in its heliumcore-burning phase or only burning hydrogen in a shell around an inert helium core.
Hekker Saskia +3 more
doaj +1 more source
Radiation-Driven Wind Hydrodynamics of Massive Stars: A Review
Galaxies, 2023 Mass loss from massive stars plays a determining role in their evolution through the upper Hertzsprung–Russell diagram. The hydrodynamic theory that describes their steady-state winds is the line-driven wind theory (m-CAK).
Michel Curé, Ignacio Araya
doaj +1 more source
The Astrophysical Journal Supplement SeriesUnderstanding how and when galaxies formed stars over the history of the Universe is fundamental to the study of galaxy evolution. The star formation histories (SFHs) of galaxies in the local Universe can be measured with high precision using deep ...
Christopher T. Garling +5 more
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Pulsations as a mass-loss trigger in evolved hot stars
, 2013 During the post-main sequence evolution massive stars pass through several short-lived phases, in which they experience enhanced mass loss in the form of clumped winds and mass ejection events of unclear origin.
Cidale, Lydia +7 more
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The young stellar population of NGC 4214 as observed with HST. I. Data and methods [PDF]
, 2007 We present the data and methods that we have used to perform a detailed UV-optical study of the nearby dwarf starburst galaxy NGC 4214 using multifilter HST/WFPC2+STIS photometry.
Arias J. I. +6 more
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Stellar Chromospheric Variability
Universe, 2021 Cool stars with convective envelopes of spectral types F and later tend to exhibit magnetic activity throughout their atmospheres. The presence of strong and variable magnetic fields is evidenced by photospheric starspots, chromospheric plages and ...
Richard de Grijs, Devika Kamath
doaj +1 more source
Carbon and Oxygen abundances across the Hertzsprung gap
, 2014 We derived atmospheric parameters and spectroscopic abundances for C and O for a large sample of stars located in the Hertzsprung gap in the Hertzsprung-Russell Diagram in order to detect chemical peculiarities and get a comprehensive overview of the ...
Adamczak, Jens, Lambert, David L.
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An Improved Hertzsprung–Russell Diagram for the Orion Trapezium Cluster [PDF]
, 2021 Min Fang +3 more
openalex +1 more source
Mapping the QCD Phase Transition with Accreting Compact Stars [PDF]
, 2008 We discuss an idea for how accreting millisecond pulsars could contribute to the understanding of the QCD phase transition in the high-density nuclear matter equation of state (EoS). It is based on two ingredients, the first one being a ``phase diagram''
Alessandro Patruno +10 more
core +2 more sources