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Inner Planetary System Gap Complexity is a Predictor of Outer Giant Planets

open access: yesThe Astronomical Journal, 2023
The connection between inner small planets and outer giant planets is crucial to our understanding of planet formation across a wide range of orbital separations. While Kepler provided a plethora of compact multiplanet systems at short separations (≲1 au)
Matthias Y. He, Lauren M. Weiss
doaj   +1 more source

Coplanar Circumbinary Planets Can Be Unstable to Large Tilt Oscillations in the Presence of an Inner Polar Planet

open access: yesThe Astrophysical Journal Letters, 2023
Mutually misaligned circumbinary planets may form in a warped or broken gas disk or from later planet–planet interactions. With numerical simulations and analytic estimates we explore the dynamics of two circumbinary planets with a large mutual ...
Anna C. Childs   +4 more
doaj   +1 more source

Can Cold Jupiters Sculpt the Edge-of-the-multis?

open access: yesThe Astrophysical Journal, 2023
Compact systems of multiple close-in super-Earths/sub-Neptunes ( compact multis ) are a ubiquitous outcome of planet formation. It was recently discovered that the outer edges of compact multis are located at smaller orbital periods than expected from ...
Nicole Sobski, Sarah C. Millholland
doaj   +1 more source

High-contrast Imaging around a 2 Myr-old CI Tau with a Close-in Gas Giant

open access: yesThe Astronomical Journal, 2022
Giant planets around young stars serve as a clue to unveiling their formation history and orbital evolution. CI Tau is a 2 Myr-old classical T Tauri star hosting an eccentric hot Jupiter, CI Tau b.
Toshinori Shimizu   +4 more
doaj   +1 more source

Implications of Atmospheric Nondetections for Trappist-1 Inner Planets on Atmospheric Retention Prospects for Outer Planets

open access: yesThe Astrophysical Journal Letters, 2023
JWST secondary eclipse observations of Trappist-1b seemingly disfavor atmospheres >∼1 bar since heat redistribution is expected to yield dayside emission temperature below the ∼500 K observed.
Joshua Krissansen-Totton
doaj   +1 more source

A Gap-sharing Planet Pair Shaping the Crescent in HD 163296: A Disk Sculpted by a Resonant Chain

open access: yesThe Astrophysical Journal Letters, 2023
The Atacama Large Millimeter Array observations of the disk around HD 163296 have resolved a crescent-shape substructure at around 55 au, inside and off-center from a gap in the dust that extends from 38 to 62 au.
Juan Garrido-Deutelmoser   +4 more
doaj   +1 more source

Turbulence in the Magnetospheres of the Outer Planets

open access: yesFrontiers in Astronomy and Space Sciences, 2021
The magnetospheres of the outer planets exhibit turbulent phenomena in an environment which is qualitatively different compared to the solar wind or the interstellar medium.
Joachim Saur
doaj   +1 more source

இலக்கியங்களில் கோள்களின் இயல்பு / Nature of Planets in Literature [PDF]

open access: yesInternational Journal of Tamil Language and Literary Studies, 2022
The study of space objects and matter outside the earth’s atmosphere is called astronomy. Ancestors of Tamil culture undoubtedly had spectacular knowledge about astronomy. It is evident in Tamil literature.
முனைவர் மு. துர்காதேவி / Dr M. Durga Devi
doaj   +1 more source

Are There Terrestrial Planets Lurking in the Outer Solar System?

open access: yesThe Astrophysical Journal Letters, 2023
Motivated by recent measurements of the free-floating-planet mass function at terrestrial masses, we consider the possibility that the solar system may have captured a terrestrial planet early in its history.
Amir Siraj
doaj   +1 more source

Small Planets around Cool Dwarfs: Enhanced Formation Efficiency of Super-Earths around M Dwarfs

open access: yesThe Astrophysical Journal Letters, 2023
Current measurements of planet population as a function of stellar mass show three seemingly contradictory signatures: close-in super-Earths are more prevalent around M dwarfs than FGK dwarfs; inner super-Earths are correlated with outer giants; and ...
Yayaati Chachan, Eve J. Lee
doaj   +1 more source

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