Assessing the Effect of Stellar Companions from High-Resolution Imaging of Kepler Objects of Interest
| Autor: | David R. Ciardi, M. Saylors, Mark E. Everett, Andrew W. Howard, Johanna Teske, Elise Furlan, Steve B. Howell, Elliott P. Horch, Geoffrey W. Marcy, Lea A. Hirsch |
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| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Earth and Planetary Astrophysics (astro-ph.EP)
Physics 010504 meteorology & atmospheric sciences Angular distance FOS: Physical sciences Binary number Astronomy and Astrophysics Astrophysics Radius 01 natural sciences Kepler Space and Planetary Science Planet 0103 physical sciences Astrophysics::Solar and Stellar Astrophysics Astrophysics::Earth and Planetary Astrophysics Multiplicity (chemistry) Spectroscopy 010303 astronomy & astrophysics High resolution imaging 0105 earth and related environmental sciences Astrophysics - Earth and Planetary Astrophysics |
| Zdroj: | NASA Astrophysics Data System |
| Popis: | We report on 176 close (90% for companions within 0.5"; the bound fraction decreases with increasing angular separation. This picture is consistent with simulations of the binary and background stellar populations in the Kepler field. We also reassess the planet radii in these systems, converting the observed differential magnitudes to a contamination in the Kepler bandpass and calculating the planet radius correction factor, $X_R = R_p (true) / R_p (single)$. Under the assumption that planets in bound binaries are equally likely to orbit the primary or secondary, we find a mean radius correction factor for planets in stellar multiples of $X_R = 1.65$. If stellar multiplicity in the Kepler field is similar to the solar neighborhood, then nearly half of all Kepler planets may have radii underestimated by an average of 65%, unless vetted using high resolution imaging or spectroscopy. 23 pages, 12 figures. Accepted for publication in The Astronomical Journal |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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