Astrofísicas: Estrellas gigantes

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    High precision velocity observations of Arcturus using the 7699 A line of potassium
    The K giant Arcturus (alpha Boo) was observed with the Birmingham double magneto-optical filter spectrometer using the GHRIL facility at the Nasmyth focus of...
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    High-resolution observations of interstellar NA I and K I absorptions towards giants within 200 PC from the sun
    The first results of a program of observations designed to probe the structure and kinematics of the Local Interstellar Medium (LISM) using the Queen's...
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    Infrared observations of metal-deficient stars
    Infrared magnitudes in the J, H, K and L bands for 64 metal-deficient stars spanning a wide range in effective temperature, luminosity and metal content are...
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    Infrared photometry of open clusters - The main sequence of NGC 752
    New infrared photometry of a sample of 39 stars in the open cluster NGC 752 is presented. These observations confirm the bimodality of the main sequence...
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    Lithium abundances and metallicities in stars near the main-sequence turnoff and a giant in M67
    The iron abundance of seven stars near the main-sequence (MS) turnoff and a giant in M67 are spectroscopically derived, and the results are discussed. The...
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    Near infrared-IRAS candidates for molecular outflows in LYNDS clouds
    The IRAS Point Source Catalog was cross-correlated with the Lynds Catalog of Dark Clouds to find bright IR sources with 100-micron fluxes higher than their...
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    Physical parameters of the intermediate age open cluster IC 1311: Clues for the theory of stellar evolution
    The results of a UBVR photometric study in the field of the open cluster IC 1311 are presented. A comparison with previously published results on NGC 7044...
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    The galactic globular cluster system - Constraints from Synthetic Horizontal Branches
    Synthetic horizontal branches, constructed on the basis of Sweigart and Gross (1976) horizontal branch star models and of the recently revised theoretical...
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    Why are Massive O-rich AGB Stars in our Galaxy not S-stars?
    We present the main results derived from a chemical analysis carried out on a large sample of galactic O-rich AGB stars using high resolution optical...