Results 71 to 80 of about 20,344 (216)

Chemodynamic subpopulations of the Carina dwarf galaxy [PDF]

, 2016
We study the chemodynamical properties of the Carina dwarf spheroidal by combining an intermediate spectroscopic resolution dataset of more than 900 red giant and red clump stars, with high-precision photometry to derive the atmospheric parameters ...
Amorisco, N. C., Evans, N. W., Gilmore, G., Koposov, S. E., Kordopatis, G.   +4 more
core   +3 more sources

Stellar evolution as seen by mixed modes

EPJ Web of Conferences, 2015
The detection of mixed modes in subgiants and red giants allows us to monitor stellar evolution from the main sequence to the asymptotic giant branch and draw seismic evolutionary tracks.
Mosser Benoît
doaj   +1 more source

Acoustic Signatures of the Helium Core Flash

, 2011
All evolved stars with masses M
Aizenman, Baglin, Bedding, Borucki, Christensen-Dalsgaard, Christensen-Dalsgaard, Dominguez, Ferguson, Huber, Huber, Jiang, Kjeldsen, Miglio, Montalbán, Osaki, Paxton, Rogers, Scuflaire, Serenelli, Shen, Stello, Thomas, Timmes, Unno   +23 more
core   +1 more source

Lithium abundances along the RGB: FLAMES-GIRAFFE spectra of a large sample of low-mass Bulge stars [PDF]

, 2011
Context: A small number of K-type giants on the red giant branch (RGB) is known to be very rich in lithium (Li). This fact is not accounted for by standard stellar evolution theory.
Alcalá, Aringer, B. Aringer, Bessell, Brown, Caffau, Caffau, Cameron, Carpenter, Charbonnel, de La Reza, de La Reza, De Propris, Fekel, Girard, Girardi, Girardi, Glass, Gonzalez, González Hernández, Grevesse, Houdashelt, Jasniewicz, Kumar, Kupka, Lambert, Lind, Lind, M. Busso, M. Schultheis, Mallik, Marigo, Marigo, McWilliam, Michaud, Mishenina, Monaco, Montegriffo, Mészáros, Nataf, Palmerini, Pasquini, Pasquini, Robin, Ruchti, Ryde, S. Uttenthaler, Schlegel, Schultheis, Skrutskie, T. Lebzelter, Uttenthaler, van der Bliek, Vanhollebeke, Wright, Zoccali   +55 more
core   +4 more sources

Revealing the Fate of Exoplanet Systems: Asteroseismic Identification of Host Star in the Red Clump or Red Giant Branch

The Astrophysical Journal Letters
Determining the evolutionary stage of stars is crucial for understanding the evolution of exoplanetary systems. In this context, red giant branch (RGB) and red clump (RC) stars, which formed at stages in the later evolution of stars situated before and ...
Wen-Xu Lin, Sheng-Bang Qian, Li-Ying Zhu
doaj   +1 more source

Red giants from the Pennsylvania – Toruń Planet Search

EPJ Web of Conferences, 2011
The main goal of the Pennsylvania - Toruń Planet Search (PTPS) is detection and characterization of planets around evolved stars using the high-accuracy radial velocity (RV) technique. The project is performed with the 9.2 m Hobby-Eberly Telescope.
Adamów M., Niedzielski A., Zieliński P., Wolszczan A.   +3 more
doaj   +1 more source

High resolution spectroscopic study of red clump stars in the Galaxy: iron group elements [PDF]

, 2010
The main atmospheric parameters and abundances of the iron group elements (vanadium, chromium, iron, cobalt and nickel) are determined for 62 red giant "clump" stars revealed in the Galactic field by the Hipparcos orbiting observatory.
Adelman, S. J., Chorniy, Y., Cohen, J. G., Gray, D. F., Ilyin, I., Puzeras, E., Tautvaisiene, G.   +6 more
core   +3 more sources

On the Age Calibration of Open Clusters Using Red Clump Stars

The Astronomical Journal
In this study, we extend the dust-independent Hatzidimitriou relation between cluster age and d _B _− _R color difference between the red giant branch (RGB) and red clump to younger cluster ages.
Abigail R. Chriss, Guy Worthey
doaj   +1 more source

Stellar Ages of TESS Stars, Adopting Spectroscopic Data from Gaia GSP-Spec

Galaxies
The Gaia DR3 GSP-spec/TESS (GST) catalog combines asteroseismic data from NASA’s TESS mission with spectroscopic data from ESA’s Gaia mission, and contains about 116,000 Red Clump and Red Giant Branch stars, surpassing previous datasets in size and ...
Elisa Denis, Patrick de Laverny, Andrea Miglio, Alejandra Recio-Blanco, Pedro Alonso Palicio, Josefina Montalban, Carlos Abia   +6 more
doaj   +1 more source

Reprocessing the Hipparcos data for evolved giant stars II. Absolute magnitudes for the R-type carbon stars [PDF]

, 2001
The Hipparcos Intermediate Astrometric Data for carbon stars have been reprocessed using an algorithm which provides an objective criterion for rejecting anomalous data points and constrains the parallax to be positive.
A. Jorissen, Alves, Barnbaum, Bartkevicius, Boffin, Bond, Cardelli, Catchpole, Cohen, Cottrell, D. Pourbaix, Dahn, Dean, Dominy, Dominy, Elias, Feast, Feast, Feast, G. Knapp, Girardi, Green, Habets, Hakkila, Iben, Johnson, Jorissen, Jorissen, Keenan, Keenan, Kerschbaum, Lee, Mayall, McClure, McClure, McClure, McClure, Noguchi, Ohnaka, Paczynski, Pourbaix, Sanford, Scalo, Shane, Skrutskie, Slettebak, Stephenson, Stock, Ulla, van Leeuwen, Vandervoort, Wallerstein, Yamashita   +52 more
core   +2 more sources