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Full-Text Articles in Physical Sciences and Mathematics
Visual Orbits Of Spectroscopic Binaries With The Chara Array. Iii. Hd 8374 And Hd 24546, Kathryn V. Lester, Francis C. Fekel, Matthew W. Muterspaugh, Douglas R. Gies, Gail Schaefer, Chris D. Farrington, Zhao Guo, Rachel A. Matson, John D. Monnier, Theo A. Ten Brummelaar, Judit Sturmann, Samuel A. Weiss
Visual Orbits Of Spectroscopic Binaries With The Chara Array. Iii. Hd 8374 And Hd 24546, Kathryn V. Lester, Francis C. Fekel, Matthew W. Muterspaugh, Douglas R. Gies, Gail Schaefer, Chris D. Farrington, Zhao Guo, Rachel A. Matson, John D. Monnier, Theo A. Ten Brummelaar, Judit Sturmann, Samuel A. Weiss
Information Systems and Engineering Management Research Publications
We present the visual orbits of two long-period spectroscopic binary stars, HD 8374 and HD 24546, using interferometric observations acquired with the CHARA Array and the Palomar Testbed Interferometer. We also obtained new radial velocities from echelle spectra using the APO 3.5 m and Fairborn 2.0 m telescopes. By combining the visual and spectroscopic observations, we solve for the full, three-dimensional orbits and determine the stellar masses and distances to within 3% uncertainty. We then estimate the effective temperature and radius of each component star through Doppler tomography and spectral energy distribution analyses, in order to compare the observed stellar …
Kr Persei, A Mid-F Eclipsing Binary With A One-Day Period, James R. Sowell, Emily Hollingworth, Francis C. Fekel, Matthew W. Muterspaugh, Horace Dale, Alexander D. Savello, Jeffrey L. Coughlin, Richard M. Williamon
Kr Persei, A Mid-F Eclipsing Binary With A One-Day Period, James R. Sowell, Emily Hollingworth, Francis C. Fekel, Matthew W. Muterspaugh, Horace Dale, Alexander D. Savello, Jeffrey L. Coughlin, Richard M. Williamon
Information Systems and Engineering Management Research Publications
KR Per is a partially eclipsing binary with an orbital period of 0.9960798 days, very close to one sidereal day, making it difficult to obtain extensive phase coverage in a reasonable amount of time. We used the Wilson–Devinney program to determine its orbital elements and stellar absolute dimensions from recently acquired radial velocities and differential BVRI observations that were supplemented with previous differential UBV measurements and published times of minima. The two components are each F5 V stars with masses of and . The radii are and . The orbital period of the eclipsing system is variable and more times …
Absolute Dimensions Of The Unevolved F-Type Eclipsing Binary Bt Vulpeculae, Guillermo Torres, Claud H. Sandberg Lacy, Francis C. Fekel, Matthew W. Muterspaugh
Absolute Dimensions Of The Unevolved F-Type Eclipsing Binary Bt Vulpeculae, Guillermo Torres, Claud H. Sandberg Lacy, Francis C. Fekel, Matthew W. Muterspaugh
Information Systems and Engineering Management Research Publications
We report extensive differential V-band photometry and high-resolution spectroscopy for the 1.14 day, detached, double-lined eclipsing binary BT Vul (F0+F7). Our radial-velocity monitoring and light-curve analysis lead to absolute masses and radii of ${M}_{1}=1.5439\pm 0.0098\,{{ \mathcal M }}_{\odot }^{{\rm{N}}}$ and ${R}_{1}=1.536\pm 0.018\,{{ \mathcal R }}_{\odot }^{{\rm{N}}}$ for the primary, and ${M}_{2}=1.2196\pm 0.0080\,{{ \mathcal M }}_{\odot }^{{\rm{N}}}$ and ${R}_{2}=1.151\pm 0.029\,{{ \mathcal R }}_{\odot }^{{\rm{N}}}$ for the secondary. The effective temperatures are 7270 ± 150 K and 6260 ± 180 K, respectively. Both stars are rapid rotators, and the orbit is circular. A comparison with stellar evolution models from the MESA Isochrones …