Results 1 to 10 of about 242,108 (213)
GJ 238 b: A 0.57 Earth Radius Planet Orbiting an M2.5 Dwarf Star at 15.2 pc
The Astronomical JournalWe report the discovery of the transiting planet GJ 238 b, with a radius of 0.566 ± 0.014 R _⊕ (1.064 ± 0.026 times the radius of Mars) and an orbital period of 1.74 days. The transit signal was detected by the TESS mission and designated TOI-486.01. The
Evan Tey +32 more
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LHS 475 b: A Potential Venus Analog Orbiting a Nearby M Dwarf
The Astronomical JournalBased on photometric observations by TESS, we present the discovery of a potential Venus analog transiting LHS 475, an M3 dwarf located 12.5 pc from the Sun. The mass of the star is 0.274 ± 0.015 M _☉ .
Kristo Ment +17 more
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Extracting starspot structures from exoplanet transit photometry
Astronomy & AstrophysicsContext . Future space-based transit photometry can provide empirical comparisons of solar and stellar spot structures with high precision. Spot transit mapping provides a way to directly observe and characterize the location, size, intensity, and evolution of starspots to infer stellar rotation rates and ...
S. M. Zaleski, A. Valio, B. Carter
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Quantifying the Contamination of TESS Ecliptic-plane Light Curves by Minor Planets
The Astronomical JournalThough missions devoted to time series photometry focus primarily on targets far beyond the solar system, their observations can be contaminated by foreground minor planets, especially near the ecliptic plane, where solar system objects are most ...
Ben Cassese +8 more
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Concealing Circumbinary Planets with Tidal Shrinkage
The Astrophysical JournalOf the 14 transiting planets that have been detected orbiting eclipsing binaries (“circumbinary planets”), none have been detected with stellar binary orbital periods shorter than 7 days, despite such binaries existing in abundance.
Saahit Mogan, J.J. Zanazzi
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A JWST Transit of a Jupiter Analog. I. Constraints on the Oblateness of Kepler-167 e
The Astronomical JournalIn 2024 October, JWST observed a transit of Kepler-167 e, a Jupiter-analog planet on a 1000+ day orbit. These observations, recorded over a long baseline of nearly 60 hr, were designed to search for signatures of planetary oblateness and/or exomoons ...
Ben Cassese +7 more
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The Third Option: Color Phase Curves to Characterize the Atmospheres of Temperate Rocky Exoplanets
The Open Journal of AstrophysicsDetecting and characterizing the atmospheres of rocky exoplanets has proven to be challenging for JWST. Transit spectroscopy of the TRAPPIST-1 planets has been impacted by the effects of spots and faculae on the host star.
Drake Deming +8 more
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TOI-6695: A Pair of Near-resonant Massive Planets Observed with TESS from the WINE Survey
The Astronomical JournalWe present the discovery and characterization of a pair of warm Jovian-mass exoplanets orbiting the Sun-like star TOI-6695, based on Transiting Exoplanet Survey Satellite (TESS) transits and precise radial velocity (RV) measurements obtained with FEROS ...
Jan Eberhardt +30 more
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The Astronomical JournalTOI-1232 is a G dwarf star with a mass of $1.0{6}_{-0.06}^{+0.07}\,{M}_{\odot }$ , a radius of 1.07 ± 0.05 R _⊙ , and a slightly higher metallicity than solar of Fe/H = 0.18 ± 0.05. The star hosts a transiting warm Jovian-mass planet, TOI-1232 b, with an
Deyan P. Mihaylov +34 more
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The Astrophysical Journal LettersWe present a joint analysis of transit timing variations (TTVs) and Doppler data for the transiting exoplanet system TOI-4504. TOI-4504 c is a warm Jupiter-mass planet that exhibits the largest known TTVs, with a peak-to-node amplitude of ∼2 days, the ...
Michaela Vítková +26 more
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