Results 21 to 30 of about 1,322 (222)

The effect of galactic kinematics on exoplanet demographics and habitability [PDF]

, 2023
: Recent studies show that galactic kinematics could affect planetary system architectures [1,2]. Planetary systems that reside in phase-space overdensities, corresponding to ripples and streams in the galactic disk, have been shown to have lower ...
Longmore, S. N., Royle, S. E., Motylinski, Michal   +2 more
core   +1 more source

Dynamical Evolution of Closely Packed Multiple Planetary Systems Subject to Atmospheric Mass Loss

The Astronomical Journal, 2023
A gap in exoplanets’ radius distribution has been widely attributed to the photoevaporation threshold of their progenitors’ gaseous envelope. Giant impacts can also lead to substantial mass loss.
Su Wang, D. N. C. Lin
doaj   +1 more source

Coupled atmospheric chemistry, radiation, and dynamics of an exoplanet generate self-sustained oscillations [PDF]

, 2023
International audienceUsing a fully coupled, three-dimensional atmospheric chemistry-radiation-dynamics model, we demonstrate that the atmospheric composition of terrestrial exoplanets can be self-oscillatory under nonvarying external forcings.
Luo, Yangcheng, Yang, Jun, Yung, Yuk L., Zhang, Michael, Hu, Yongyun   +4 more
core   +1 more source

Tidal Dissipation Regimes among the Short-period Exoplanets

The Astrophysical Journal Letters, 2023
The efficiency of tidal dissipation provides a zeroth-order link to a planet’s physical properties. For super-Earth and sub-Neptune planets in the range R _⊕ ≲ R _p ≲ 4 R _⊕ , particularly efficient dissipation (i.e., low tidal quality factors) may ...
Emma M. Louden, Gregory P. Laughlin, Sarah C. Millholland   +2 more
doaj   +1 more source

exoMMR: A New Python Package to Confirm and Characterize Mean Motion Resonances

The Astronomical Journal, 2023
The study of orbital resonances allows for the constraint of planetary properties of compact systems. We can predict a system’s resonances by observing the orbital periods of the planets, as planets in or near mean motion resonance (MMR) have period ...
Mariah G. MacDonald, Michael S. Polania Vivas, Skylar D’Angiolillo, Ashley N. Fernandez, Tyler Quinn   +4 more
doaj   +1 more source

The 0.5MJ transiting exoplanet WASP-13b [PDF]

, 2009
We report the discovery of WASP-13b, a low-mass $ M_{\rm p} = 0.46 ^_~M_J$ transiting exoplanet with an orbital period of 4.35298 $\pm$ 0.00004 days. The transit has a depth of 9 mmag, and although our follow-up photometry does not allow us to constrain ...
West, Richard G., Joshi, YC, Christian, Damian Joseph, Wheatley, P.J., Enoch, B., Maxted, Pierre, Loeillet, B, D. R. Anderson, Christian, D.J., Irwin, J., Horne, K, Horne, K., K. Horne, Wilson, D.M., Udry, S., Gibson, N.P., B. Loeillet, Wilson, D. M., Christian, D. J., C. Moutou, Moutou, C., Barros, S.C.C., F. P. Keenan, Haswell, C. A., Maxted, P, Queloz, Didier, Simpson, E., Loeillet, B., Moutou, Claire, H. C. Stempels, Anderson, DR, Lister, TA, Stempels, Eric, Cameron, E., Queloz, D., Irwin, J, P. Maxted, Stempels, H.C., Cameron, A. Collier, Norton, Andrew J., N. Parley, D. M. Wilson, Keenan, F. P., Barros, S. C. C., Anderson, D.R., Simpson, E, Norton, A.J., F. Bouchy, Ryans, R, Horne, Keith Douglas, Enoch, B, B. Smalley, A. Collier Cameron, Wilson, DM, Smalley, B., C. Hellier, G. Hébrard, Cameron, Andrew Collier, Collier Cameron, A., Haswell, C.A., Collier Cameron, A, D. Pollacco, Queloz, D, Gibson, N. P., Joshi, Y. C., E. Simpson, Pollacco, Don, Street, R. A., I. Todd, Skillen, I, Wheatley, PJ, West, R.G., Hellier, Coel, Street, R., Y. C. Joshi, Street, R.A., Skillen, I., West, R. G., M. Mayor, D. J. Christian, R. A. Street, Irwin, Jonathan, Christian, DJ, Ryans, R., C. A. Haswell, Mayor, M., Todd, I., L. Hebb, Bouchy, F, Hebb, L., Haswell, CA, Norton, AJ, Smalley, Barry, B. Enoch, Stempels, H. C., Mayor, M, Norton, A. J., Hébrard, G, Gibson, NP, Parley, N, Hebb, L, R. G. West, Lister, T. A., J. Irwin, Keenan, FP, Todd, I, Hébrard, G., Pollacco, D, T. A. Lister, Pollacco, D., Barros, SCC, Parley, N., R. Ryans, D. Queloz, N. P. Gibson, Hellier, C., Keenan, F.P., S. C. C. Barros, Moutou, C, Lister, T.A., Todd, Ian, Bouchy, François, I. Skillen, West, RG, Bouchy, F., Smalley, B, P. J. Wheatley, Gibson, Neale, Hellier, C, S. Udry, Maxted, P., Stempels, HC, Joshi, Y.C., Wheatley, P. J., A. J. Norton, Anderson, D. R., Street, RA, Udry, S   +137 more
core   +1 more source

Tidal dynamics of transiting exoplanets [PDF]

Proceedings of the International Astronomical Union, 2010
AbstractTransits give us the mass, radius, and orbital properties of the planet, all of which inform dynamical theories. Two properties of the hot Jupiters suggest they had a dramatic origin via tidal damping from high eccentricity. First, the tidally circularized planets (in the 1-4 day pile-up) lie along a relation or boundary in the mass-period ...
openaire   +1 more source

Secular spin-axis dynamics of exoplanets [PDF]

Astronomy & Astrophysics, 2019
Context. Seasonal variations and climate stability of a planet are very sensitive to the planet obliquity and its evolution. This is of particular interest for the emergence and sustainability of land-based life, but orbital and rotational parameters of exoplanets are still poorly constrained.
Saillenfest, M., Laskar, J., Boué, G.
openaire   +4 more sources

The Diversity of Exoplanets: From Interior Dynamics to Surface Expressions [PDF]

Elements, 2021
The coupled interior–atmosphere system of terrestrial exoplanets remains poorly understood. Exoplanets show a wide variety of sizes, densities, surface temperatures, and interior structures, with important knock-on effects for this coupled system. Many exoplanets are predicted to have a “stagnant lid” at the surface, with a rigid stationary crust ...
Ballmer, MD, Noack, L
openaire   +3 more sources

Secular spin-axis dynamics of exoplanets (Corrigendum) [PDF]

Astronomy & Astrophysics, 2019
International ...
Saillenfest, M., Laskar, J., Boué, G.
openaire   +3 more sources