Results 261 to 270 of about 4,112,115 (294)

A precise metallicity and carbon-to-oxygen ratio for a warm giant exoplanet from its panchromatic JWST emission spectrum. [PDF]

Proc Natl Acad Sci U S A
Wiser LS, Bell TJ, Line MR, Schlawin E, Beatty TG, Welbanks L, Greene TP, Parmentier V, Murphy MM, Fortney JJ, Arnold K, Mehta N, Ohno K, Mukherjee S.   +13 more
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The chemical compositions of red giant stars

AIP Conference Proceedings, 1989
In this review, we discuss the different types of red giant stars from the point of view of spectral classification and general observational properties, followed by a discussion of those types of red giants that are expected to occur based upon current ideas from stellar evolution theory.
Verne V. Smith
exaly   +2 more sources

Pulsational Stability of Red Giant Stars

AIP Conference Proceedings, 2009
We revisit the problem of pulsational stability of radial and strongly trapped non‐radial modes of red giant stars. We present the results of numerical computations of oscillation properties of a 2.03 M⊙ evolutionary stellar model along the AGB. We examine the pulsational stability by taking into account the effect of perturbation of convective flux ...
Dumitru Pricopi, Joyce Ann Guzik
exaly   +2 more sources

Mixed modes in red-giant stars observed with CoRoT⋆,⋆⋆ [PDF]

Astronomy and Astrophysics, 2011
Context. The CoRoT mission has provided thousands of red-giant light curves. The analysis of their solar-like oscillations allows us to characterize their stellar properties. Aims.
Saskia Hekker, Benoît Mosser, C Barban
exaly   +3 more sources

Evolution of red-giant stars

Physics Today, 1976
Theorists are paying a lot of attention nowadays to the structure and evolution of highly luminous stars with low surface temperatures. These stars, referred to as “red giants” because of their color and large radii, are believed to be in an advanced phase of their evolution.
openaire   +1 more source

Red giant stars as standard candles

2022
This thesis introduces two new extragalactic distance determination methods; the first uses the median magnitude of carbon-rich asymptotic giant branch stars (CS), while the second uses the combined luminosity function of the red-giant branch (RGB) and oxygen-rich asymptotic giant branch stars (AGB). The sample of CS and RGB+AGB stars are selected from
openaire   +1 more source

Envelopes of red giant stars

2008
A discussion is presented of the observations of circumstellar envelopes around late-type giant stars. The results are treated in two broad categories. First, there are extensive surveys which provide a few basic parameters of the flows (vexp, dM/dt and/or abundance information). These indicate the importance of rapid mass-loss to stellar evolution and
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The Photospheres of Red-Giant Stars

1981
Various empirical methods for studying the physical properties of red-giant photospheres are illustrated by examples of recent studies. Certain branches of the theory of late-type photospheres, where progress has recently been made or will probably be made within a near future, are commented on.
openaire   +1 more source

Transport processes in red giant stars

EAS Publications Series, 2006
Low-mass stars ( ๏ ) exhibit, at all the stages of their evolution, signatures of processes that require challenging modeling beyond the standard stellar theory. In this paper we focus on their peculiarities while they climb the red giant branch (RGB).
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Microvariability of Red Giant Stars

2006
info:eu-repo/semantics ...
Mowlavi, Nami, Jorissen, Alain
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