Spectroscopic and Interferometric Measurements of Nine K Giant Stars

Abstract

We present spectroscopic and interferometric measurements for a sample of nine K giant stars. These targets are of particular interest because they are slated for stellar oscillation observations. Our improved parameters will directly translate into reduced errors in the final masses for these stars when interferometric radii and asteroseismic densities are combined. Here we determine each star's limb-darkened angular diameter, physical radius, luminosity, bolometric flux, effective temperature, surface gravity, metallicity, and mass. When we compare our interferometric and spectroscopic results, we find no systematic offsets in the diameters and the values generally agree within the errors. Our interferometric temperatures for seven of the nine stars are hotter than those determined from spectroscopy with an average difference of about 380 K.

4 tables, 4 figures

References in corpus (5)

• Planet formation around stars of various masses: The snow line and the frequency of giant planets
• Revised Filter Profiles and Zero Points for Broadband Photometry
• Discovery of a planet around the K giant star 4 UMa
• Solar-like oscillations in the metal-poor subgiant nu Indi: constraining the mass and age using asteroseismology
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Cited by in corpus (4)

• Fundamental Parameters of 87 Stars from the Navy Precision Optical Interferometer
• HD-TESS: An Asteroseismic Catalog of Bright Red Giants within TESS Continuous Viewing Zones
• Angular Diameters and Fundamental Parameters of Forty-Four Stars from the Navy Precision Optical Interferometer
• Constraining the size, shape, and albedo of the large Trans-Neptunian Object (28978) Ixion with multi-chord stellar occultations