The dominant accretion process leading to the formation of the terrestrial planets of the Solar System is a subject of intense scientific debate. Two radically different scenarios have been proposed. The classic scenario starts from a disk of planetesimals which, by mutual collisions, produce a set...
solar system are also discussed: in the inner planetary region, contributing to the formation of the planetary atmospheres and water reservoirs; in the asteroid and Kuiper belts, sculpting their primordial structures, and in the outer edge of the solar system, building up the Oort cloud of ...
Several scenarios have been proposed to explain this conundrum, including the delivery of HSEs to the聽Earth by a few big impactors, the accretion of pebble-sized objects on dynamically cold orbits that enhanced the Earth's gravitational focusing factor, and the 'sawtooth' impact model, with its...
Around a million quasars have been catalogued in the Universe by probing deeper and using new methods for discovery. However, the hardest ones to find seem to be the rarest and brightest specimens. Here we study the properties of the most luminous of all
solar nebulasolar system/ protoplanetary accretion disksgiant planets growth timesasteroid belt temperaturesilicate minerals vaporisationsilicates meltingconvectively unstable disksThe concept of a protosolar viscous accretion disc is reviewed and a simple accretion disc model is laid out in such a way that...
Core accretion theory lacks an explanation for the formation of the gas giants in the outer solar system due to the amount of time the process takes. In contrast, the pebble accretion model falls short of explaining the formation of the terrestrial planets due to a lack of building material ...
The core accretion model Approximately 4.6 billion years ago, the solar system was a cloud of dust and gas known as a solar nebula. Gravity collapsed the material in on itself as it began to spin, forming the sun in the center of the nebula. With the rise of the sun, the remaining ma...
5. The analysis model for the growth of film and ice was established and the influence of airflow parameters on the characteristics and rate of icing accretion was analyzed. 研究表明,在飞机结冰过程中,冰层生长速率及不同冰型的形成不但受来流参数的影响,而且与固、液相区的内部传热特性相关,因而考虑...
The structure of this paper is as follows: in Sect.2, we studied the spacetime properties of the KN BH in the MOG theory and analyzed its shadow images. Section3, is to introduce the detail of the thin disk model. In Sect.4, we presented the images of the thin disk accretion, as ...
It has been suggested that a similar enhancement of surface abundances might occur due to accretion of 'planetesimals' left over after formation of the solar system, and both processes may occur, thereby increasing the effect. The simple accretion model of Hoyle and Lyttleton is discussed ...