Results 111 to 120 of about 16,468 (216)

Resonant and Ultra-short-period Planet Systems Are at Opposite Ends of the Exoplanet Age Distribution

The Astronomical Journal
Exoplanet systems are thought to evolve on secular timescales over billions of years. This evolution is impossible to directly observe on human timescales in most individual systems.
Stephen P. Schmidt, Kevin C. Schlaufman, Jacob H. Hamer   +2 more
doaj   +1 more source

The Structure of Exoplanets

, 2013
The hundreds of exoplanets that have been discovered in the past two decades offer a new perspective on planetary structure. Instead of being the archetypal examples of planets, those of our Solar System are merely possible outcomes of planetary system ...
Fortney, Jonathan J., Sotin, Christophe, Spiegel, David S.   +2 more
core   +1 more source

Binarity of Transit Host Stars - Implications on Planetary Parameters

, 2009
Straight-forward derivation of planetary parameters can only be achieved in transiting planetary systems. However, planetary attributes such as radius and mass strongly depend on stellar host parameters.
Bakos, Brandner, Butler, C. Bergfors, Charbonneau, Chauvin, Desidera, Eggenberger, F. Hormuth, Fischer, Hansen, Holman, Hormuth, Kraus, Law, M. Janson, Mandushev, Mayor, Mugrauer, Mugrauer, Mugrauer, O'Donovan, Oke, Pickles, Pollacco, Raghavan, S. Daemgen, S. Hippler, Seager, Skrutskie, Smith, Sozzetti, Street, T. Henning, Torres, W. Brandner, Yi, Zacharias   +37 more
core   +2 more sources

Peas-in-a-pod across the Radius Valley: Rocky Systems Are Less Uniform in Mass but More Uniform in Size and Spacing

The Astrophysical Journal Letters
The ubiquity of “peas-in-a-pod” architectural patterns and the existence of the radius valley each presents a striking population-level trend for planets with R _p ≤ 4 R _⊕ that serves to place powerful constraints on the formation and evolution of these
Armaan V. Goyal, Songhu Wang
doaj   +1 more source

Cloud formation in exoplanet atmospheres : nucleation of small molecular clusters

, 2023
It has been inferred that many exoplanets host clouds in their atmospheres. Understanding the processes through which these clouds form, and being able to model them is essential for our understanding of their climate and to explain our observations.
openaire   +4 more sources

Investigating Planet Formation and Evolutionary Processes with Short-Period Exoplanets

, 2018
White Paper submitted to National Academy of Sciences Exoplanet Science Strategy ...
Jackson, B., Adams, E., Heller, R., Endl, M.   +3 more
openaire   +3 more sources

Chemical Mapping of Temperate Sub-Neptune Atmospheres: Constraining the Deep Interior H2O/H2 Ratio from the Atmospheric CO2/CH4 Ratio

The Astrophysical Journal Letters
Understanding the planetary envelope composition of sub-Neptune-type exoplanets is challenging due to the inherent degeneracy in their interior composition scenarios.
Jeehyun Yang, Renyu Hu
doaj   +1 more source

The WFC3 Galactic Bulge Treasury Program: Metallicity Estimates for the Stellar Population and Exoplanet Hosts

, 2010
We present new UV-to-IR stellar photometry of four low-extinction windows in the Galactic bulge, obtained with the Wide Field Camera 3 on the Hubble Space Telescope (HST).
Anderson, Jay, Bond, Howard E., Brown, Thomas M., Casertano, Stefano, Ferguson, Henry C., Jeffery, Elizabeth J., Livio, Mario, Minniti, Dante, Panagia, Nino, Renzini, Alvio, Sahu, Kailash, Smith, Ed, Tumlinson, Jason, Valenti, Elena, Valenti, Jeff A., VandenBerg, Don A., Zoccali, Manuela   +16 more
core   +1 more source

Planet Mass Function around M Stars at 1–10 au: A Plethora of Sub-Earth Mass Objects

The Astrophysical Journal
Small planets (≲1 M _⊕ ) at intermediate orbital distances (∼1 au) represent an uncharted territory in exoplanetary science. The upcoming microlensing survey by the Nancy Grace Roman Space Telescope will be sensitive to objects as light as Ganymede and ...
Yayaati Chachan, Eve J. Lee
doaj   +1 more source

Insight into the Formation of β Pic b through the Composition of Its Parent Protoplanetary Disk as Revealed by the β Pic Moving Group Member HD 181327

The Astronomical Journal
It has been suggested that β Pic b has a supersolar metallicity and subsolar C/O ratio. Assuming solar carbon and oxygen abundances for the star β Pic and therefore the planet’s parent protoplanetary disk, β Pic b’s C/O ratio suggests that it formed via ...
Henrique Reggiani, Jhon Yana Galarza, Kevin C. Schlaufman, David K. Sing, Brian F. Healy, Andrew McWilliam, Joshua D. Lothringer, Laurent Pueyo   +7 more
doaj   +1 more source