Results 21 to 30 of about 282,229 (301)
Early planet formation as a trigger for further planet formation [PDF]
, 1999 Recent discoveries of extrasolar planets at small orbital radii, or with significant eccentricities, indicate that interactions between massive planets and the disks of gas and dust from which they formed are vital for determining the final shape of ...
Armitage, Philip J., Hansen, Brad M. S.
core +3 more sources
A Planetary Mass Companion to the K0 Giant HD 17092 [PDF]
, 2007 We report the discovery of a substellar-mass companion to the K0-giant HD 17092 with the Hobby-Eberly Telescope. In the absence of any correlation of the observed 360-day periodicity with the standard indicators of stellar activity, the observed radial ...
A. Niedzielski +14 more
core +2 more sources
Planetary mass limits using Hipparcos astrometry [PDF]
Symposium - International Astronomical Union, 2004 Using Hipparcos and Tycho-2 data, together with the radial velocity information, a statistical analysis is applied to all the orbital solutions of planetary candidates, in order to avoid a bias towards small inclinations. There are hints of additional, longer period companions.
Frédéric Arenou, Julienne Palasi
openaire +1 more source
Giant Planet Companion to 2MASSW J1207334-393254
, 2005 We report new VLT/NACO imaging observations of the young, nearby brown dwarf 2MASSW J1207334-393254 and its suggested planetary mass companion (2M1207 b).
A.-M. Lagrange +40 more
core +3 more sources
Multi-Planet Destabilisation and Escape in Post-Main Sequence Systems [PDF]
, 2013 Discoveries of exoplanets orbiting evolved stars motivate critical examinations of the dynamics of $N$-body systems with mass loss. Multi-planet evolved systems are particularly complex because of the mutual interactions between the planets.
Hadjidemetriou, John D. +3 more
core +1 more source
Factors Affecting the Radii of Close-in Transiting Exoplanets [PDF]
, 2012 The radius of an exoplanet may be affected by various factors, including irradiation, planet mass and heavy element content. A significant number of transiting exoplanets have now been discovered for which the mass, radius, semi-major axis, host star ...
A. Collier Cameron +54 more
core +2 more sources
Obliquity Constraints on an Extrasolar Planetary-mass Companion [PDF]
The Astronomical Journal, 2020 Abstract We place the first constraints on the obliquity of a planetary-mass companion outside of the solar system. Our target is the directly imaged system 2MASS J01225093–2439505 (2M0122), which consists of a 120 Myr 0.4 M ⊙ star hosting a 12–27 M J companion at 50 au.
Marta L. Bryan +10 more
openaire +3 more sources
The Astrophysical Journal, 2023 The magnetic activity of a star—which modulates the stellar wind outflow—shapes the immediate environments of orbiting (exo)planets and induces atmospheric loss, thereby impacting their habitability.
Sakshi Gupta +2 more
doaj +1 more source
Dust Settling and Rapid Planetary Migration
, 2010 Planetary migration is essential to explain the observed mass-period relation for exoplanets. Without some stopping mechanism, the tidal, resonant interaction between planets and their gaseous disc generally causes the planets to migrate inward so ...
Abramowitz +51 more
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The Astronomical Journal, 2023 We present the analysis of seven microlensing planetary events with planet/host mass ratios q < 10 ^−4 : KMT-2017-BLG-1194, KMT-2017-BLG-0428, KMT-2019-BLG-1806, KMT-2017-BLG-1003, KMT-2019-BLG-1367, OGLE-2017-BLG-1806, and KMT-2016-BLG-1105.
Weicheng Zang +42 more
doaj +1 more source