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Exoplanet habitability is traditionally assessed by comparing a planet's semi-major axis to the location of its host star's "habitable zone," the shell around a star for which Earth-like planets can possess liquid surface water. The Kepler…

Earth and Planetary Astrophysics · Physics 2015-10-01 Rory Barnes , Victoria S. Meadows , Nicole Evans

The nominal habitable zone for exoplanets orbiting M dwarfs lies close to the host star, making dynamical considerations especially important. One consequence of this proximity is the expectation of spin synchronization, with implications…

Earth and Planetary Astrophysics · Physics 2025-12-10 Kohhei Bessho , Sarah Ballard , Natalia Guerrero

M dwarf stars comprise 70-80% of the galaxy's stars and host most of its rocky planets. They also importantly differ from Sunlike stars in that they are "active" for billions of years or more: rotating quickly, flaring often, and emitting…

Earth and Planetary Astrophysics · Physics 2025-03-17 Dana Clarice Yaptangco , Sarah Ballard , Jason Dittmann

A sample of 4 thousands Gaia sources with apparent $G$-band magnitudes of $<17$ and trigonometric parallaxes of $>3.33$ milli-arcseconds were cross-matched to the Transiting Exoplanet Survey high level science products and the Full-Frame…

Solar and Stellar Astrophysics · Physics 2022-03-30 Rhorom Priyatikanto

Stellar variability impacts radial velocities at various timescales and therefore the detectability of exoplanets and the mass determination based on this technique. It is necessary to implement systematic studies, to delineate the current…

Earth and Planetary Astrophysics · Physics 2023-08-16 Nadège Meunier , Romain Pous , Sophia Sulis , David Mary , Anne-Marie Lagrange

In multiple-planet systems, gravitational interactions of exoplanets could lead to transit timing variations (TTVs), whose amplitude becomes significantly enhanced when planets are in or near mean-motion resonances (MMRs). In cases where…

Photometric surveys for exoplanetary ring systems have not confirmed any object with Saturn-sized ring. We systematically analyse 308 TESS planet candidates, mainly comprised of giant short-period planets orbiting nearby bright stars. These…

Earth and Planetary Astrophysics · Physics 2025-05-12 Tsubasa Umetani , Masataka Aizawa , Yuichiro Ezoe , Yoshitaka Ishisaki

In the effort to characterize the masses, radii, and atmospheres of potentially habitable exoplanets, there is an urgent need to find examples of such planets transiting nearby M dwarfs. The MEarth Project is an ongoing effort to do so, as…

Earth and Planetary Astrophysics · Physics 2015-06-05 Zachory K. Berta , Jonathan Irwin , David Charbonneau , Christopher J. Burke , Emilio E. Falco

Continuous data releases throughout the TESS primary mission will provide unique opportunities for the exoplanet community at large to contribute to maximizing TESS's scientific return via the discovery and validation of transiting planets.…

Earth and Planetary Astrophysics · Physics 2019-07-31 Ryan Cloutier

The Transiting Exoplanet Survey Satellite (TESS) recently observed 18 transits of the hot Jupiter WASP-4b. The sequence of transits occurred 81.6 $\pm$ 11.7 seconds earlier than had been predicted, based on data stretching back to 2007.…

The Transiting Exoplanet Survey Satellite (TESS) will perform a two-year survey of nearly the entire sky, with the main goal of detecting exoplanets smaller than Neptune around bright and nearby stars. There do not appear to be any…

Earth and Planetary Astrophysics · Physics 2017-05-26 L. G. Bouma , Joshua N. Winn , Jacobi Kosiarek , P. R. McCullough

We present the characterization of the transiting planet KELT-1b % ($R_p \simeq 1.15 R_J, M_p \simeq 27.23 M_J $) using data from the Transiting Exoplanet Survey Satellite (TESS). % during cycle $2$ and sector $17$. Our light curve model…

Earth and Planetary Astrophysics · Physics 2022-06-01 Mohammad Eftekhar , Yousefali Abedini

We have undertaken a long-term project, Planets in Stellar Clusters Extensive Search (PISCES), to search for transiting planets in open clusters. In this paper we present the results for NGC 2158, an intermediate age, populous cluster. We…

A commissioning survey of the Lookout Observatory has observed fourteen faint (V ~ 13 to 17) variables in the region of the exoplanet Kepler-8b. Three of these are variable star candidates discovered by the Asteroid Terrestrial-Impact Last…

Solar and Stellar Astrophysics · Physics 2020-12-22 Neil Thomas , Margaret Paczkowski

Searching for transits provides a very promising technique for finding close-in extra-solar planets. Transiting planets present the advantage of allowing one to determine physical properties such as mass and radius unambiguously. The…

We describe a new transit detection algorithm designed to detect single transit events in discontinuous Perkins INfrared Exosatellite Survey (PINES) observations of L and T dwarfs. We use this algorithm to search for transits in 131 PINES…

We present results of a Transiting Exoplanet Survey Satellite (TESS) search for short-period pulsations in compact stellar objects observed in years 1 and 3 of the TESS mission, during which the southern ecliptic hemisphere was targeted. We…

Solar and Stellar Astrophysics · Physics 2023-01-11 A. S. Baran , V. Van Grootel , R. H. Ostensen , H. L. Worters , S. K. Sahoo , S. Sanjayan , S. Charpinet , P. Nemeth , J. H. Telting , D. Kilkenny

We present ground and space-based photometric observations of TOI-270 (L231-32), a system of three transiting planets consisting of one super-Earth and two sub-Neptunes discovered by TESS around a bright (K-mag=8.25) M3V dwarf. The planets…