A highly inclined orbit for the 110 day period m-dwarf companion KOI-368.01
Article
Article Title | A highly inclined orbit for the 110 day period m-dwarf companion KOI-368.01 |
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ERA Journal ID | 45091 |
Article Category | Article |
Authors | Zhou, George (Author) and Huang, Chelsea X. (Author) |
Journal Title | The Astrophysical Journal Letters |
Journal Citation | 776 (2), pp. 1-6 |
Article Number | L35 |
Number of Pages | 6 |
Year | 2013 |
Publisher | IOP Publishing |
Place of Publication | United Kingdom |
ISSN | 2041-8205 |
2041-8213 | |
Digital Object Identifier (DOI) | https://doi.org/10.1088/2041-8205/776/2/l35 |
Web Address (URL) | https://iopscience.iop.org/article/10.1088/2041-8205/776/2/L35 |
Abstract | We report the detection of asymmetry in the transit light curves of the 110 day period companion to KOI-368, a rapidly rotating A-dwarf. The significant distortion in the transit light curve is attributed to spin-orbit misalignment between the transiting companion and the gravity darkened host star. Our analysis was based on 11 long cadence and 2 short cadence transits of KOI-368.01 from the Kepler mission, as well as stellar parameters determined from our follow-up spectroscopic observation. We measured the true obliquity between the orbit normal and the stellar rotation axis to be. We also find a secondary eclipse event with depth 29 ± 3 ppm at phase 0.59, from which the temperature of the companion is constrained to 3060 ± 50 K, indicating that KOI-368.01 is a late M-dwarf. The eccentricity is also calculated from the eclipse to be 0.1429 ± 0.0007. The long period, high obliquity, and low eccentricity of KOI-368.01 allow us to limit a number of proposed theories for the misalignment of binary systems. |
Keywords | binaries: eclipsing; stars: individual (KOI-368); stars: low-mass; techniques: photometric |
Contains Sensitive Content | Does not contain sensitive content |
ANZSRC Field of Research 2020 | 510109. Stellar astronomy and planetary systems |
Public Notes | File reproduced in accordance with the copyright policy of the publisher/author. |
Byline Affiliations | Australian National University |
Princeton University, United States | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q6x77/a-highly-inclined-orbit-for-the-110-day-period-m-dwarf-companion-koi-368-01
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