Results 111 to 120 of about 10,242 (205)

Saving Doomed Planets: Mass Loss and Angular Momentum Return Boost Hot Jupiter Survival Rates

open access: yesThe Astrophysical Journal
The existence of giant extrasolar planets on short-period orbits (“hot Jupiters”) challenges planet formation theories because such planets are difficult to form close to the star.
Grant C. Weldon   +2 more
doaj   +1 more source

Hot Jupiter secondary eclipses measured by Kepler

open access: yesEPJ Web of Conferences, 2011
Hot-Jupiters are known to be dark in visible bandpasses, mainly because of the alkali metal absorption features. The outstanding quality of the Kepler mission photometry allows a detection (or non-detection upper limits on) giant planet secondary ...
Seager S., Demory B.-O.
doaj   +1 more source

Long‐Term Variations of Jupiter's Stratospheric Planetary Waves Modulated by the Quasi‐Quadrennial Oscillation

open access: yesJournal of Geophysical Research: Planets, Volume 131, Issue 4, April 2026.
Abstract Planetary wave activity on Jupiter has been consistently observed since the Voyager mission. This study uses NASA Infrared Telescope Facility 7.6–7.9 μm long‐term ground‐based observations from 1984 to 2011 and global maps from the Cassini flyby in November and December 2000 to analyze Jupiter's stratospheric planetary wave activity.
Jialin Zhang   +6 more
wiley   +1 more source

Separating Super-puffs versus Hot Jupiters among Young Puffy Planets

open access: yesThe Astrophysical Journal
Discoveries of close-in young puffy ( R _p ≳ 6 R _⊕ ) planets raise the question of whether they are bona fide hot Jupiters or puffed-up Neptunes, potentially placing constraints on the formation location and timescale of hot Jupiters.
Amalia Karalis   +2 more
doaj   +1 more source

Strict Upper Limits on the Carbon-to-Oxygen Ratios of Eight Hot Jupiters from Self-Consistent Atmospheric Retrieval [PDF]

open access: yes, 2015
The elemental compositions of hot Jupiters are informative relics of planet formation that can help us answer long-standing questions regarding the origin and formation of giant planets.
Benneke, Björn
core   +1 more source

3D mixing in hot Jupiter atmospheres. I. application to the day/night cold trap in HD 209458b

open access: yes, 2013
Hot Jupiters exhibit atmospheric temperatures ranging from hundreds to thousands of Kelvin. Because of their large day-night temperature differences, condensable species that are stable in the gas phase on the dayside, such as TiO and silicates, may ...
Lian, Yuan   +2 more
core   +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

Shedding Light on Desert Dwellers

open access: yesThe Astrophysical Journal
The “sub-Jovian desert” (2 ≲  R _p  ≲ 10 R _⊕ , periods ≲3 days) is sparsely populated but no longer empty. Recent surveys have revealed that planets residing in the desert are dense ( ρ  ≳ 1 g cm ^−3 ), massive (∼10−50 M _⊕ ), and orbit metal-rich stars
Tim Hallatt, Sarah Millholland
doaj   +1 more source

A Larger Sample Confirms Small Planets around Hot Stars Are Misaligned

open access: yesThe Astrophysical Journal Letters
The distribution of stellar obliquities provides critical insight into the formation and evolution pathways of exoplanets. In the past decade, it was found that hot stars hosting hot Jupiters are more likely to have high obliquities than cool stars, but ...
Emma M. Louden   +9 more
doaj   +1 more source

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