Results 131 to 140 of about 3,808,369 (275)

Breaking Giant Chains: Early-stage Instabilities in Long-period Giant Planet Systems

The Astrophysical Journal
Orbital evolution is a critical process that sculpts planetary systems, particularly during their early stages where planet–disk interactions are expected to lead to the formation of resonant chains.
Vighnesh Nagpal, Max Goldberg, Konstantin Batygin   +2 more
doaj   +1 more source

Planet-disk interactions in the binary system Kepler-38 and contribution to the METIS/ELT instrument [PDF]

, 2022
The scope of this dissertation is two-fold. The first part studies the planet-disk interactions in the binary system Kepler-38. Close binary stars like Kepler 38 hosting a circumbinary planet are, with 23 systems known, not unusual. A number of those systems exhibit a non-zero mutual inclination between the planetary orbit and the orbital plane of the ...
openaire  

Object‐based deep learning for probabilistic convective‐core nowcasting from satellite data

Quarterly Journal of the Royal Meteorological Society, EarlyView.
Convective cores detected from Meteosat infrared imagery are represented as compact physical objects to generate probabilistic nowcasts up to 6 h ahead. A spatio‐temporal transformer models interactions among evolving core populations and produces gridded probability forecasts across the western Sahel.
Mendrika Rakotomanga, Douglas J. Parker, Nadhir Ben Rached, Seonaid R. Anderson, Cornelia Klein, Steven C. Wells   +5 more
wiley   +1 more source

The Influence of General Relativity on the Spins of Celestial Bodies in Inclined Orbits

The Astrophysical Journal
Through the Rossiter–McLaughlin effect, several hot Jupiters have been found to exhibit spin–orbit misalignment and even retrograde orbits. The high obliquity observed in these planets can be attributed to two primary formation mechanisms, as summarized ...
Huan-Rong Yuan, Ying Wang, Xin Wu, Ji-Wei Xie, Hui-Gen Liu, Ji-Lin Zhou, Wei Sun   +6 more
doaj   +1 more source

The circumbinary disc of HD 34700A

Astronomy & Astrophysics
Context. ALMA observations have shown that substructures are ubiquitous in protoplanetary discs. A sub-group, the transition discs, shows large cavities and rings in the dust continuum.
Fasano D., Benisty M., Stadler J., Zagaria F., Ziampras A., Winter A., Bae J., Facchini S., Kurtovic N. T., Ragusa E., Teague R.   +10 more
doaj   +1 more source

Multi‐scale flow analysis for scale‐aware urban canopy models

Quarterly Journal of the Royal Meteorological Society, EarlyView.
We found that scale‐aware models are necessary when numerical weather prediction models approach hectometric resolution, which is associated with a characteristic length‐scale of morphological heterogeneity. This morphology‐dependent length‐scale indicates that resolved and unresolved heterogeneity are equally important.
Jingzi Huang, Maarten van Reeuwijk
wiley   +1 more source

The multi-wavelength vertical structure of the archetypal β Pictoris debris disk

Astronomy & Astrophysics
Context. Thermal imaging of debris disks is resolving the vertical height in an increasing number of systems, enabling the use of the vertical structure to decode the dynamical state of the planetary system. Aims.
Han Yinuo, Wyatt Mark C., Jankovic Marija R., Zhang Andrew, Dent William R. F., Hughes A. Meredith, Matrà Luca   +6 more
doaj   +1 more source

Apparent Stellar Wobble by a Planet in a Circumstellar Disk:

, 2007
Astrometric detection of a stellar wobble on the plane of the sky will provide us a next breakthrough in searching extrasolar planets. The Space Interferometry Mission (SIM) is expected to achieve a high-precision astrometry as accurate as 1 as, which
Taku Takeuchi, Limitations On Planet, D. N. C. Lin, T. Velusamy   +3 more
core  

Data‐driven emulation of flow‐dependent background‐error variance in variational data assimilation

Quarterly Journal of the Royal Meteorological Society, EarlyView.
A machine‐learning approach is developed to emulate flow‐dependent background‐error variance within a variational data assimilation framework. The method reproduces uncertainty information that would normally require a 50‐member ensemble using only five members, while maintaining comparable observation fit and forecast performance.
Wei Pan, Massimo Bonavita, Marcin Chrust, Elías Hólm   +3 more
wiley   +1 more source

Biomimetic robots driven by smart materials: Motion forms, stimulation methods and applications

Responsive Materials, EarlyView.
Biomimetic robots enhance adaptability by mimicking biological systems, but rigid materials limit performance. Smart materials with stimuli responsiveness and shape adaptability enable more flexible actuation and improved environmental interaction.
Zeyu Yang, Yehong Peng, Shibo Xue, Yujiang Zhuang, Xiang Gong, Guiwei Li, Lei Ren, Wenzheng Wu, Luquan Ren   +8 more
wiley   +1 more source