Results 81 to 90 of about 2,529 (169)
The K2 and TESS Synergy. III. Search and Rescue of the Lost Ephemeris for K2's First Planet
The Astronomical JournalK2-2 b/HIP 116454 b, the first exoplanet discovery by K2 during its Two-Wheeled Concept Engineering Test, is a sub-Neptune (2.5 ± 0.1 R _⊕ , 9.7 ± 1.2 M _⊕ ) orbiting a relatively bright ( K _S = 8.03) K-dwarf star on a 9.1 day period. Unfortunately, due
Erica Thygesen +15 more
doaj +1 more source
White Dwarf Stars in the Big Data Era
Astronomische Nachrichten, Volume 346, Issue 1, January 2025.ABSTRACT White dwarf stars are the most common endpoint of stellar evolution. Therefore, these old, numerous and compact objects provide valuable information on the late stages of stellar evolution, the physics of dense plasma and the structure and evolution of our Galaxy.
Maria Camisassa
wiley +1 more source
The Astrophysical JournalThe amount of surface water is thought to be critical for a planet’s climate stability and thus habitability. However, the probability that a rocky planet may exhibit surface water at any point in its evolution is dependent on multiple factors, such as ...
Kiersten M. Boley +4 more
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Architectures of Planetary Systems. II. Trends with Host Star Mass and Metallicity
The Astronomical JournalThe current census of planetary systems displays a wide range of architectures. Extending earlier work, this paper investigates the correlation between our classification framework for these architectures and host stellar properties.
Alex R. Howe +2 more
doaj +1 more source
Journal of Advances in Modeling Earth Systems, Volume 16, Issue 7, July 2024.Abstract We investigate the effect of uncertainty in water vapor continuum absorption at terrestrial wavenumbers on CO2 forcing F $\mathcal{F}$, longwave feedback λ, and climate sensitivity S $\mathcal{S}$ at surface temperatures Ts between 270 and 330 K.
Florian E. Roemer +3 more
wiley +1 more source
The Astrophysical JournalPlanet formation models suggest that the small exoplanets that migrate from beyond the snowline of the protoplanetary disk likely contain water-ice-rich cores (∼50% by mass), also known as water worlds.
Aritra Chakrabarty, Gijs D. Mulders
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Lessons from the apparent peculiar nature of the star TYC 6544‐3483‐1
Astronomische Nachrichten, Volume 345, Issue 4, May 2024.Abstract We report a radio and optical study of the star TYC 6544‐3483‐1 originally selected as a follow‐up target in the course of our efforts to cross‐identify Galactic high‐energy sources. The star by itself finally turned out to be a very ordinary main‐sequence star despite the initial expectations that apparently pointed to the contrary.
Josep Martí +5 more
wiley +1 more source
Planet Masses, Radii, and Orbits from NASA’s K2 Mission
The Astrophysical Journal Supplement SeriesWe report the masses, sizes, and orbital properties of 86 planets orbiting 55 stars observed by NASA’s K2 Mission with follow-up Doppler measurements by the HIRES spectrometer at the W. M.
Andrew W. Howard +52 more
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Exo-MerCat v2.0.0: Updates and open-source release of the Exoplanet Merged Catalog software
Astronomy and Computing18 pages, 3 figures. Accepted for publication on Astronomy and Computing.
Eleonora Alei +10 more
openaire +3 more sources
HST astrometry of the closest brown dwarfs‐II. Improved parameters and constraints on a third body
Astronomische Nachrichten, Volume 345, Issue 1, January 2024.Abstract Located at less than two pc away, Luhman 16 AB (WISE J104915.57‐531906.1) is the closest pair of brown dwarfs and the third closest “stellar” system to Earth. An exoplanet candidate in the Luhman 16 binary system was reported in 2017 based on a weak astrometric signature in the analysis of 12 HST epochs.
L. R. Bedin +7 more
wiley +1 more source