Spectra with a high signal-to-noise ratio of 79 stars that are just below the main-sequence turnoff of M71 are presented. They yield indices for the strength of the G band of CH and the ultraviolet CN band at 3885 Å. These indices are each to first-order bimodal and they are anticorrelated. There are approximately equal numbers of CN-weak/CH-strong and CN-strong/CH-weak main-sequence stars in M71. It is not yet clear whether these star-to-star variations arise from primordial variations or from mixing within a fraction of individual stars as they evolve
Spectroscopic and photometric observations have been made of the cyanogen band strength distributio...
High resolution echelle spectra of the 8005 Angstroms CN bands are presented for five bright giants ...
Click on the DOI link to access the article.We have computed low-mass stellar models and synthetic s...
Spectra with a high signal-to-noise ratio of 79 stars that are just below the main-sequence turnoff ...
Spectra with a high signal-to-noise ratio of 50 stars that are just below the main-sequence turnoff ...
Spectra with a high signal-to-noise ratio of 50 stars which are just below the main sequence turnoff...
CH and CN variations are definitely present among the main sequence stars in a narrow range of lumin...
Context. Globular clusters show star-to-star abundance variations for light elements that ...
Our work focuses on the understanding of the origin of CNO-anomalies, which have been detected in s...
Building upon earlier observations that demonstrate substantial star-to-star differences in the carb...
Context. Abundance variations in moderately metal-rich globular clusters can give clues about the fo...
Broad-band J, H, and K magnitudes and narrow-band CO and H_2O indices for 25 giant and horizontal-br...
We present an analysis of a large sample of moderate-resolution Keck Low Resolution Imaging Spectrom...
It is now clear that abundance variations from star-to-star among the light elements, particularly C...
We investigate the multiple stellar populations of the globular clusters (GCs) M3, M5, M13, and M71 ...
Spectroscopic and photometric observations have been made of the cyanogen band strength distributio...
High resolution echelle spectra of the 8005 Angstroms CN bands are presented for five bright giants ...
Click on the DOI link to access the article.We have computed low-mass stellar models and synthetic s...
Spectra with a high signal-to-noise ratio of 79 stars that are just below the main-sequence turnoff ...
Spectra with a high signal-to-noise ratio of 50 stars that are just below the main-sequence turnoff ...
Spectra with a high signal-to-noise ratio of 50 stars which are just below the main sequence turnoff...
CH and CN variations are definitely present among the main sequence stars in a narrow range of lumin...
Context. Globular clusters show star-to-star abundance variations for light elements that ...
Our work focuses on the understanding of the origin of CNO-anomalies, which have been detected in s...
Building upon earlier observations that demonstrate substantial star-to-star differences in the carb...
Context. Abundance variations in moderately metal-rich globular clusters can give clues about the fo...
Broad-band J, H, and K magnitudes and narrow-band CO and H_2O indices for 25 giant and horizontal-br...
We present an analysis of a large sample of moderate-resolution Keck Low Resolution Imaging Spectrom...
It is now clear that abundance variations from star-to-star among the light elements, particularly C...
We investigate the multiple stellar populations of the globular clusters (GCs) M3, M5, M13, and M71 ...
Spectroscopic and photometric observations have been made of the cyanogen band strength distributio...
High resolution echelle spectra of the 8005 Angstroms CN bands are presented for five bright giants ...
Click on the DOI link to access the article.We have computed low-mass stellar models and synthetic s...
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