672 citations · 5.3k across the 101 of their papers we have counts for
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Wavelength Dependence of Activity-Induced Photometric Variations for Young Cool Stars in Hyades
Kohei Miyakawa, Teruyuki Hirano, Akihiko Fukui +3
We investigate photometric variations due to stellar activity which induce systematic radial-velocity errors (so-called "jitter") for the four targets in the Hyades open cluster ob…
Tidal Effects on the Radial Velocities of V723 Mon: Additional Evidence for a Dark Companion
Kento Masuda, Teruyuki Hirano
Jayasinghe et al. (2021) identified a dark companion on a nearly edge-on orbit around the red giant star V723 Monoceros as a black h…
Characterization of M dwarfs Using Optical Mid-Resolution Spectra for Exploration of Small Exoplanets
Yohei Koizumi, Masayuki Kuzuhara, Masashi Omiya +4
We present the optical spectra of 338 nearby M dwarfs, and compute their spectral types, effective temperatures (), and radii. Our spectra have been obtained usin…
TOI-503: The first known brown dwarf-Am star binary from the TESS mission
Ján Šubjak, Rishikesh Sharma, Theron W. Carmichael +76
We report the discovery of an intermediate-mass transiting brown dwarf, TOI-503b, from the TESS mission. TOI-503b is the first brown dwarf discovered by TESS and orbits a metallic-…
Orbital characterization of GJ1108A system, and comparison of dynamical mass with model-derived mass for resolved binaries
T. Mizuki, M. Kuzuhara, K. Mede +55
We report an orbital characterization of GJ1108Aab that is a low-mass binary system in pre-main-sequence phase. Via the combination of astrometry using adaptive optics and radial v…
Obliquities of Hot Jupiter host stars: Evidence for tidal interactions and primordial misalignments
Simon Albrecht, Joshua N. Winn, John A. Johnson +10
We provide evidence that the obliquities of stars with close-in giant planets were initially nearly random, and that the low obliquities that are often observed are a consequence o…