Results 1 to 10 of about 21,151,583 (337)

Post-main-sequence planetary system evolution [PDF]

Royal Society Open Science, 2016
The fates of planetary systems provide unassailable insights into their formation and represent rich cross-disciplinary dynamical laboratories. Mounting observations of post-main-sequence planetary systems necessitate a complementary level of theoretical
Dimitri Veras
doaj   +8 more sources

Exocomets in a planet nursery [PDF]

Nature Communications
Evidence for exocomets has been found in PDS 70, a young planetary system where planets are still forming. The discovery extends exocomet studies into an earlier stage of planetary evolution, when planets, planetesimals and protoplanetary discs coexist.
Daniela Iglesias
doaj   +2 more sources

TOI-1136 is a Young, Coplanar, Aligned Planetary System in a Pristine Resonant Chain [PDF]

Astronomical Journal, 2022
Convergent disk migration has long been suspected to be responsible for forming planetary systems with a chain of mean-motion resonances (MMRs). Dynamical evolution over time could disrupt the delicate resonant configuration. We present TOI-1136, a 700 ±
F. Dai, K. Masuda, C. Beard, P. Robertson, M. Goldberg, K. Batygin, L. Bouma, J. Lissauer, E. Knudstrup, S. Albrecht, A. Howard, H. Knutson, E. Petigura, L. Weiss, H. Isaacson, M. Kristiansen, H. Osborn, Song-Hu Wang, Xian-Yu Wang, A. Behmard, M. Greklek-McKeon, S. Vissapragada, N. Batalha, C. Brinkman, A. Chontos, I. Crossfield, C. Dressing, T. Fetherolf, B. Fulton, M. Hill, D. Huber, S. Kane, J. Lubin, M. Macdougall, A. Mayo, T. Močnik, J. M. Akana Murphy, R. Rubenzahl, N. Scarsdale, Dakotah B. Tyler, J. Van Zandt, A. Polanski, H. Schwengeler, I. Terentev, P. Benni, A. Bieryla, D. Ciardi, B. Falk, E. Furlan, E. Girardin, P. Guerra, K. Hesse, S. Howell, J. Lillo-Box, E. Matthews, J. Twicken, J. Villaseñor, D. Latham, J. Jenkins, G. Ricker, S. Seager, R. Vanderspek, J. Winn   +62 more
semanticscholar   +1 more source

Bipolar planetary nebulae from common-envelope evolution of binary stars [PDF]

Astronomy & Astrophysics, 2021
Asymmetric shapes and evidence for binary central stars suggest a common-envelope origin for many bipolar planetary nebulae. The bipolar components of the nebulae are observed to expand faster than the rest, and the more slowly expanding material has ...
Patrick A. Ondratschek, F. Röpke, F. Schneider, C. Fendt, C. Sand, S. Ohlmann, R. Pakmor, V. Springel   +7 more
semanticscholar   +1 more source

Dynamics of Planetary Systems within Star Clusters: Aspects of the Solar System’s Early Evolution [PDF]

Astronomical Journal, 2020
Most planetary systems—including our own—are born within stellar clusters, where interactions with neighboring stars can help shape the system architecture. This paper develops an orbit-averaged formalism to characterize the cluster’s mean-field effects,
K. Batygin, F. Adams, Y. Batygin, E. Petigura   +3 more
semanticscholar   +1 more source

Spin–Orbit Alignment of the β Pictoris Planetary System [PDF]

Astrophysical Journal, 2020
A crucial diagnostic that can tell us about processes involved in the formation and dynamical evolution of planetary systems is the angle between the rotation axis of a star and a planet's orbital angular momentum vector (“spin–orbit” alignment or ...
S. Kraus, J. Le Bouquin, A. Kreplin, C. Davies, E. Hone, J. Monnier, T. Gardner, G. Kennedy, S. Hinkley   +8 more
semanticscholar   +1 more source

Planetesimal rings as the cause of the Solar System’s planetary architecture [PDF]

Nature Astronomy, 2021
Astronomical observations reveal that protoplanetary disks around young stars commonly have ring- and gap-like structures in their dust distributions. These features are associated with pressure bumps trapping dust particles at specific locations, which ...
A. Izidoro, R. Dasgupta, S. Raymond, R. Deienno, B. Bitsch, A. Isella   +5 more
semanticscholar   +1 more source

Planets Across Space and Time (PAST). IV. The Occurrence and Architecture of Kepler Planetary Systems as a Function of Kinematic Age Revealed by the LAMOST–Gaia–Kepler Sample

The Astronomical Journal, 2023
One of the fundamental questions in astronomy is how planetary systems form and evolve. Measuring the planetary occurrence and architecture as a function of time directly addresses this question.
Jia-Yi Yang, Di-Chang Chen, Ji-Wei Xie, Ji-Lin Zhou, Subo Dong, Zi Zhu, Zheng Zheng, Chao Liu, Weikai Zong, Ali Luo   +9 more
doaj   +1 more source

Atmospheric Escape Processes and Planetary Atmospheric Evolution [PDF]

Journal of Geophysical Research - Space Physics, 2020
The habitability of the surface of any planet is determined by a complex evolution of its interior, surface, and atmosphere. The electromagnetic and particle radiation of stars drive thermal, chemical, and physical alteration of planetary atmospheres ...
G. Gronoff, P. Arras, S. Baraka, J. Bell, G. Cessateur, O. Cohen, S. Curry, J. Drake, M. Elrod, J. Erwin, K. Garcia-Sage, C. Garraffo, A. Glocer, N. Heavens, K. Lovato, R. Maggiolo, C. Parkinson, C. Simon Wedlund, D. Weimer, W. Moore   +19 more
semanticscholar   +1 more source

Flyby encounters between two planetary systems II: exploring the interactions of diverse planetary system architectures [PDF]

, 2020
Planetary systems formed in clusters may be subject to stellar encounter flybys. Here we create a diverse range of representative planetary systems with different orbital scales and planets' masses and examine encounters between them in a typical open ...
Daohai Li, A. Mustill, M. Davies
semanticscholar   +1 more source