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Doomed Worlds. I. No New Evidence for Orbital Decay in a Long-term Survey of 43 Ultrahot Jupiters
Huang, Chelsea X.; Sickafoose, Amanda A.; Jackson, Brian +8 more
Ultrahot Jupiters (UHJs) are likely doomed by tidal forces to undergo orbital decay and eventual disruption by their stars, but the timescale over which this process unfolds is unknown. We present results from a long-term project to monitor UHJ transits. We recovered WASP-12 b's orbital decay rate of ms yr‑1, in agreement with prior wor…
Differential Rotation of CoRoT Stars and a Kepler Binary Star from Starspot Transit Mapping
Valio, Adriana; Araújo, Alexandre; Menezes, Fabian
While direct magnetic field measurements are rare for slowly rotating stars, spots observed during planetary transits provide a potential indicator of magnetic activity on stellar surfaces. Moreover, the rotation of the stellar surface can be probed by monitoring the spots' position with time in subsequent transits. This study investigates the dyn…
TV Mon - post-mass transfer Algol-type binary with δ Scuti pulsations in primary component
Han, Zhanwen; Kovalev, Mikhail; Chen, Xuefei +4 more
We present a study of the detached eclipsing binary TV Mon using spectra from the LAMOST (Large Sky Area Multi-Object Fiber Spectroscopic Telescope) medium-resolution survey, ASAS-SN (All Sky Automated Survey for SuperNovae), and CoRoT (Convection, Rotation and planetary Transits) photometry. We apply multiple-epochs spectral fitting to derive rad…