Results 21 to 30 of about 1,480 (207)
Testing exoplanet evaporation with multitransiting systems [PDF]
Monthly Notices of the Royal Astronomical Society, 2019 ABSTRACT The photoevaporation model is one of the leading explanations for the evolution of small, close-in planets and the origin of the radius-valley. However, without planet mass measurements, it is challenging to test the photoevaporation scenario. Even if masses are available for individual planets, the host star’s unknown EUV/X-ray
Owen, JE, Estrada, BC
openaire +6 more sources
Resilient habitability of nearby exoplanet systems [PDF]
Monthly Notices of the Royal Astronomical Society, 2019 ABSTRACT We investigate the possibility of finding Earth-like planets in the habitable zone of 34 nearby FGK-dwarfs, each known to host one giant planet exterior to their habitable zone detected by RV. First we simulate the dynamics of the planetary systems in their present day configurations and determine the fraction of stable ...
Giorgi Kokaia +2 more
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“In-System” Fission-Events: An Insight into Puzzles of Exoplanets and Stars? [PDF]
Universe, 2021 In expansion of our recent proposal that the solar system’s evolution occurred in two stages—during the first stage, the gaseous giants formed (via disk instability), and, during the second stage (caused by an encounter with a particular stellar-object leading to “in-system” fission-driven nucleogenesis), the terrestrial planets formed (via accretion ...
Elizabeth P. Tito, Vadim I. Pavlov
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The Astronomical Journal, 2023 Large-scale exoplanet surveys like the Transiting Exoplanet Survey Satellite (TESS) mission are powerful tools for discovering large numbers of exoplanet candidates.
Christopher R. Mann +50 more
doaj +1 more source
DEBRIS DISKS INKEPLEREXOPLANET SYSTEMS [PDF]
The Astrophysical Journal, 2012 The Kepler Mission recently identified 997 systems hosting candidate extrasolar planets, many of which are super-Earths. Realizing these planetary systems are candidates to host extrasolar asteroid belts, we use mid-infrared data from the Wide-field Infrared Survey Explorer (WISE) to search for emission from dust in these systems.
Samantha Lawler, Brett Gladman
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The Astronomical Journal, 2023 We present the discovery from the TESS mission of two giant planets transiting M-dwarf stars: TOI 4201 b and TOI 5344 b. We also provide precise radial velocity measurements and updated system parameters for three other M dwarfs with transiting giant ...
J. D. Hartman +64 more
doaj +1 more source
Follow-Up and Validation of K2 and TESS Planetary Systems With Keck NIRC2 Adaptive Optics Imaging
Frontiers in Astronomy and Space Sciences, 2021 High resolution imaging (HRI) is a critical part of the transiting exoplanet follow-up and validation process. HRI allows previously unresolved stellar companions and background blends to be resolved, vetting false positive signals and improving the ...
Joshua E. Schlieder +9 more
doaj +1 more source
Speckle Imaging Characterization of Radial Velocity Exoplanet Systems [PDF]
The Astronomical Journal, 2021 Abstract We conducted speckle imaging observations of 53 stellar systems that were members of long-term radial velocity (RV) monitoring campaigns and exhibited substantial accelerations indicative of planetary or stellar companions in wide orbits.
Paul A. Dalba +12 more
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Alkaline exospheres of exoplanet systems: evaporative transmission spectra [PDF]
Monthly Notices of the Royal Astronomical Society, 2020 ABSTRACT Hydrostatic equilibrium is an excellent approximation for the dense layers of planetary atmospheres, where it has been canonically used to interpret transmission spectra of exoplanets. Here, we exploit the ability of high-resolution spectrographs to probe tenuous layers of sodium and potassium gas due to their formidable ...
Andrea Gebek, Apurva V Oza
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Radio-loud Exoplanet-exomoon Survey: GMRT Search for Electron Cyclotron Maser Emission
The Astronomical Journal, 2022 We conducted the first dedicated search for signatures of exoplanet–exomoon interactions using the Giant Metrewave Radio Telescope (GMRT) as part of the radio-loud exoplanet-exomoon survey.
Mayank Narang +5 more
doaj +1 more source