Results 51 to 60 of about 4,754,244 (357)
External photoevaporation of circumstellar discs constrains the time-scale for planet formation [PDF]
Monthly notices of the Royal Astronomical Society, 2019 Planet-forming circumstellar discs are a fundamental part of the star formation process. Since stars form in a hierarchical fashion in groups of up to hundreds or thousands, the UV radiation environment that these discs are exposed to can vary in ...
Francisca Concha-Ram'irez +3 more
semanticscholar +1 more source
Diverse outcomes of planet formation and composition around low-mass stars and brown dwarfs [PDF]
Monthly notices of the Royal Astronomical Society, 2019 The detection of Earth-size exoplanets around low-mass stars –in stars such as Proxima Centauri and TRAPPIST-1– provide an exceptional chance to improve our understanding of the formation of planets around M stars and brown dwarfs.
Yamila Miguel +4 more
semanticscholar +1 more source
The Astrophysical Journal, 2023 Ocean worlds, or icy bodies in the outer solar system that have or once had subsurface liquid water oceans, are among the most compelling topics of astrobiology.
Kathleen Mandt +3 more
doaj +1 more source
How much does turbulence change the pebble isolation mass for planet formation? [PDF]
Astronomy & Astrophysics, 2018 Context. When a planet becomes massive enough, it gradually carves a partial gap around its orbit in the protoplanetary disk. A pressure maximum can be formed outside the gap where solids that are loosely coupled to the gas, typically in the pebble size ...
S. Ataiee +3 more
semanticscholar +1 more source
The Origin of Universality in the Inner Edges of Planetary Systems
The Astrophysical Journal Letters, 2023 The characteristic orbital period of the innermost objects within the galactic census of planetary and satellite systems appears to be nearly universal, with P on the order of a few days. This paper presents a theoretical framework that provides a simple
Konstantin Batygin +2 more
doaj +1 more source
Simulations for Terrestrial Planets Formation [PDF]
Proceedings of the International Astronomical Union, 2009 AbstractWe investigate the formation of terrestrial planets in the late stage of planetary formation using two-planet model. At that time, the protostar has formed for about 3 Myr and the gas disk has dissipated. In the model, the perturbations from Jupiter and Saturn are considered.
Zhang Niu, Zhang Niu, Ji Jianghui
openaire +6 more sources
Formation of Giant Planet Satellites [PDF]
The Astrophysical Journal, 2020 Abstract Recent analyses have shown that the concluding stages of giant planet formation are accompanied by the development of a large-scale meridional flow of gas inside the planetary Hill sphere. This circulation feeds a circumplanetary disk that viscously expels gaseous material back into the parent nebula, maintaining the system in a
Batygin, Konstantin +1 more
openaire +6 more sources
Neutrophil deficiency increases T cell numbers at the site of tissue injury in mice
FEBS Letters, EarlyView.In wild‐type mice, injury or acute inflammation induces neutrophil influx followed by macrophage accumulation. Mcl1ΔMyelo (neutrophil‐deficient) mice lack neutrophils, and in response to muscle injury show fewer macrophages and exhibit strikingly elevated T‐cell numbers, primarily non‐conventional “double‐negative” (DN) αβ and γδ T cells.
Hajnalka Halász +6 more
wiley +1 more source
Possible role of human ribonuclease dicer in the regulation of R loops
FEBS Open Bio, EarlyView.R loops play an important role in regulating key cellular processes such as replication, transcription, centromere stabilization, or control of telomere length. However, the unscheduled accumulation of R loops can cause many diseases, including cancer, and neurodegenerative or inflammatory disorders. Interestingly, accumulating data indicate a possible
Klaudia Wojcik +2 more
wiley +1 more source
The dispersal of planet-forming discs: theory confronts observations [PDF]
Royal Society Open Science, 2017 Discs of gas and dust around million-year-old stars are a by-product of the star formation process and provide the raw material to form planets. Hence, their evolution and dispersal directly impact what type of planets can form and affect the final ...
Barbara Ercolano, Ilaria Pascucci
doaj +1 more source