Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987mnras.224..107n&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 224, Jan. 1, 1987, p. 107-130.
Astronomy and Astrophysics
Astronomy
39
Giant Stars, Planetary Evolution, Protoplanets, Solar System, Star Formation, Stellar Mass, Hertzsprung-Russell Diagram, Solar Radiation, Solar Wind, Stefan-Boltzmann Law, Stellar Winds, Ultraviolet Radiation, Planets, Formation, Nebula, Gases, Planetesimals, Capture, Distance, Mass, Earth, Jupiter, Saturn, Neptune, Time Scale, Structure, Layers, Evolution, Calculations, Fragmentation, Dust, Kinematics, Parameters, Theoretical Studies, Models, Relaxation, Motion
Scientific paper
The processes of planet formation are investigated both in a gaseous nebula and after the gaseous nebula has been blown away. It is shown that a protoplanet of mass more than about 100 times the representative mass of the planetesimal rapidly captures the planetesimals whose orbital semimajor axes are near its own. Therefore the growth of the protoplanet is determined by the migration rate of planetesimals to the region where they can be captured. The growth and capture of planetesimals is investigated and the time of planet formation is determined as a function of distance from the central star. As an example, planet formation around a star of 1 solar mass is investigated. The earth is found to form at t of about 2 x 10 to the 6th yr in the gaseous nebula. The protoplanets at Jovian and Saturnian orbits grow to 10 times the earth mass at 2 x 10 to the 7th yr and 5 x 10 to the 7th yr, respectively, in the gaseous nebula. Therefore they can capture large amounts of gas and grow to giant planets as long as the gaseous nebula survives for 5 x 10 to the 7th yr in these regions. The formation time of Neptune in a gas-free state is found to be 3 x 10 to the 9th yr, which is shorter than the age of the solar system.
No associations
LandOfFree
Formation of planets around stars of various masses. I - Formulation and a star of one solar mass does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Formation of planets around stars of various masses. I - Formulation and a star of one solar mass, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Formation of planets around stars of various masses. I - Formulation and a star of one solar mass will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1624005