Astrophysical: M dwarf stars

  • Publication
    A Massive Hot Jupiter Orbiting a Metal-rich Early M Star Discovered in the TESS Full-frame Images

    Observations and statistical studies have shown that giant planets are rare around M dwarfs compared with Sun-like stars. The formation mechanism of these...

  • Publication
    A Second Planet Transiting LTT 1445A and a Determination of the Masses of Both Worlds

    LTT 1445 is a hierarchical triple M-dwarf star system located at a distance of 6.86 pc. The primary star LTT 1445A (0.257 M ⊙) is known to host the transiting...

  • Publication
    Detailed Chemical Abundances for a Benchmark Sample of M Dwarfs from the APOGEE Survey

    Individual chemical abundances for 14 elements (C, O, Na, Mg, Al, Si, K, Ca, Ti, V, Cr, Mn, Fe, and Ni) are derived for a sample of M dwarfs using high...

  • Publication
    Direct Imaging Explorations for Companions around Mid-Late M Stars from the Subaru/IRD Strategic Program

    The Subaru telescope is currently performing a strategic program (SSP) using the high-precision near-infrared (NIR) spectrometer IRD to search for exoplanets...

  • Publication
    Modeling the Chromosphere and Transition Region of Planet-hosting Star GJ 436

    Ahead of upcoming space missions intending to conduct observations of low-mass stars in the ultraviolet (UV) spectral region it becomes imperative to...

  • Publication
    New Mass and Radius Constraints on the LHS 1140 Planets: LHS 1140 b Is either a Temperate Mini-Neptune or a Water World

    The two-planet transiting system LHS 1140 has been extensively observed since its discovery in 2017, notably with Spitzer, HST, TESS, and ESPRESSO, placing...

  • Publication
    SPECULOOS Northern Observatory: Searching for Red Worlds in the Northern Skies

    SPECULOOS is a ground-based transit survey consisting of six identical 1 m robotic telescopes. The immediate goal of the project is to detect temperate...

  • Publication
    Stellar Characterization and Radius Inflation of Hyades M-dwarf Stars from the APOGEE Survey

    We present a spectroscopic analysis of a sample of 48 M-dwarf stars (0.2 M ⊙ < M < 0.6 M ⊙) from the Hyades open cluster using high-resolution H-band spectra...

  • Publication
    TOI-1452 b: SPIRou and TESS Reveal a Super-Earth in a Temperate Orbit Transiting an M4 Dwarf

    Exploring the properties of exoplanets near or inside the radius valley provides insight on the transition from the rocky super-Earths to the larger, hydrogen...