Results 81 to 90 of about 2,553 (147)

Evidence for Primordial Alignment II: Insights from Stellar Obliquity Measurements for Hot Jupiters in Compact Multiplanet Systems

open access: yesThe Astronomical Journal
A significant fraction of hot Jupiters have orbital axes misaligned with their host stars’ spin axes. The large stellar obliquities of these giants have long been considered potential signatures of high-eccentricity migration, which is expected to clear ...
Brandon T. Radzom   +7 more
doaj   +1 more source

Constraining the Presence of Companion Planets in Hot Jupiter Planetary Systems Using Transit-timing Variation Observations from TESS

open access: yesThe Astrophysical Journal Supplement Series
The presence of another planetary companion in a transiting exoplanet system can impact its transit light curve, leading to sinusoidal transit-timing variations (TTV).
Zixin Zhang   +9 more
doaj   +1 more source

Damping Obliquities of Hot Jupiter Hosts by Resonance Locking

open access: yesThe Astrophysical Journal Letters
When orbiting hotter stars, hot Jupiters are often highly inclined relative to their host star equator planes. By contrast, hot Jupiters orbiting cooler stars are more aligned.
J. J. Zanazzi   +2 more
doaj   +1 more source

A Planet Candidate Orbiting near the Hot Jupiter TOI-2818 b Inferred through Transit Timing

open access: yesThe Astrophysical Journal
TOI-2818 b is a hot Jupiter orbiting a slightly evolved G-type star on a 4.04 day orbit that shows transit timing variations (TTVs) suggestive of a decreasing orbital period. In the most recent year of TESS observations, transits were observed ∼8 minutes
Brendan J. McKee   +7 more
doaj   +1 more source

Quartz Clouds in the Dayside Atmosphere of the Quintessential Hot Jupiter HD 189733 b

open access: yesThe Astrophysical Journal Letters
Recent mid-infrared observations with JWST's Mid-Infrared Instrument Low Resolution Spectrometer (MIRI LRS) have resulted in the first direct detections of absorption features from silicate clouds in the transmission spectra of two transiting exoplanets,
Julie Inglis   +18 more
doaj   +1 more source

A Photochemical Phosphorus-Hydrogen-Oxygen Network for Hydrogen-dominated Exoplanet Atmospheres

open access: yesThe Astrophysical Journal
Due to the detection of phosphine (PH _3 ) in the solar system gas giants Jupiter and Saturn, PH _3 has long been suggested to be detectable in exosolar substellar atmospheres too.
Elspeth K. H. Lee   +5 more
doaj   +1 more source

The evolution of hot Jupiters revealed by the age distribution of their host stars. [PDF]

open access: yesProc Natl Acad Sci U S A, 2023
Chen DC   +13 more
europepmc   +1 more source

Confirmation and Characterization of the Eccentric, Warm Jupiter TIC 393818343 b with a Network of Citizen Scientists

open access: yesThe Astronomical Journal
NASA’s Transiting Exoplanet Survey Satellite (TESS) has identified over 7000 candidate exoplanets via the transit method, with gas giants among the most readily detected due to their large radii. Even so, long intervals between TESS observations for much
Lauren A. Sgro   +23 more
doaj   +1 more source

Overcast Mornings and Clear Evenings in Hot Jupiter Exoplanet Atmospheres

open access: yesThe Astrophysical Journal Letters
Aerosols are an old topic in the young field of exoplanet atmospheres. Understanding what they are, how they form, and where they go has long provided a fertile playground for theorists.
Guangwei Fu   +12 more
doaj   +1 more source

TOI-1408: Discovery and Photodynamical Modeling of a Small Inner Companion to a Hot Jupiter Revealed by Transit Timing Variations

open access: yesThe Astrophysical Journal Letters
We report the discovery and characterization of a small planet, TOI-1408 c, on a 2.2 day orbit located interior to a previously known hot Jupiter, TOI-1408 b ( P = 4.42 days, M = 1.86 ± 0.02 M _Jup , R = 2.4 ± 0.5 R _Jup ) that exhibits grazing transits.
Judith Korth   +62 more
doaj   +1 more source

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