High-resolution spectra of stars in globular clusters. VI - Oxygen-deficient red giant stars in M13

1991 ◽  
Vol 101 ◽  
pp. 1693 ◽  
Author(s):  
Jeffery A. Brown ◽  
George Wallerstein ◽  
J. B. Oke
Keyword(s):  
High Resolution ◽  
Globular Clusters ◽  
Giant Stars ◽  
Red Giant Stars ◽  
Red Giant

scholarly journals Solar-like oscillations in subgiant and red-giant stars: mixed modes

2013 ◽  
Vol 9 (S301) ◽  
pp. 325-331 ◽  
Author(s):  
S. Hekker ◽  
A. Mazumdar
Keyword(s):  
High Resolution ◽  
Outer Part ◽  
Space Missions ◽  
Giant Stars ◽  
Internal Structures ◽  
Different Depths ◽  
Mixed Modes ◽  
Red Giant Stars ◽  
Red Giant

AbstractThanks to significant improvements in high-resolution spectrographs and the launch of dedicated space missions MOST, CoRoT and Kepler, the number of subgiants and red-giant stars with detected oscillations has increased significantly over the last decade. The amount of detail that can now be resolved in the oscillation patterns does allow for in-depth investigations of the internal structures of these stars. One phenomenon that plays an important role in such studies are mixed modes. These are modes that carry information of the inner radiative region as well as from the convective outer part of the star allowing to probe different depths of the stars.Here, we describe mixed modes and highlight some recent results obtained using mixed modes observed in subgiants and red-giant stars.

scholarly journals Lithium in metal-poor red giants

2009 ◽  
Vol 5 (S268) ◽  
pp. 361-362
Author(s):  
Laimons Začs ◽  
Arturs Barzdis
Keyword(s):  
High Resolution ◽  
Asymptotic Giant Branch ◽  
Red Giants ◽  
Lithium Abundance ◽  
Giant Stars ◽  
Synthetic Spectra ◽  
Lithium Depletion ◽  
Red Giant Stars ◽  
Red Giant

AbstractThe lithium abundance was calculated for five metal-poor red giant stars from Li i doublet at 6707 Å by fitting the observed high-resolution spectra with synthetic spectra. The lithium abundance was found to be low in all stars, logϵ(Li) ≤ 1.8, confirming lithium depletion on the red giant and asymptotic giant branch.

Chemical Compositions of Red Giant Stars in Old Large Magellanic Cloud Globular Clusters

2006 ◽  
Vol 640 (2) ◽  
pp. 801-822 ◽  
Author(s):  
Jennifer A. Johnson ◽  
Inese I. Ivans ◽  
Peter B. Stetson
Keyword(s):  
Globular Clusters ◽  
Large Magellanic Cloud ◽  
Magellanic Cloud ◽  
Chemical Compositions ◽  
Giant Stars ◽  
Red Giant Stars ◽  
Red Giant

Ratio of Horizontal Branch Stars to Red Giant Stars in Globular Clusters

Nature ◽  
1969 ◽  
Vol 224 (5223) ◽  
pp. 1006-1008 ◽  
Author(s):  
ICKO IBEN ◽  
ROBERT T. ROOD ◽  
KAREN M. STROM ◽  
STEPHEN E. STROM
Keyword(s):  
Globular Clusters ◽  
Horizontal Branch ◽  
Giant Stars ◽  
Horizontal Branch Stars ◽  
Red Giant Stars ◽  
Red Giant
Sign in / Sign up

Export Citation Format

Share Document