Astronomy and Astrophysics – Astronomy
Scientific paper
May 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000aas...19510916r&link_type=abstract
American Astronomical Society, 195th AAS Meeting, #109.16; Bulletin of the American Astronomical Society, Vol. 32, p.876
Astronomy and Astrophysics
Astronomy
Scientific paper
During recent years, a set of stars with planets those mass are comparable with the mass of Jupiter have been discovered. In several stars, the planets are located at about 0.1 AU or closer, Upsilon Andromedae was previously reported to have Jupiter-mass companion at 0.059 AU. Later, two additional periodicities were revealed. They assume the presence of "planets" at 0.83 and 2.5 AU with minimal masses - 2 and 4.1 Jupiter mass. Recently observed transit of a planet across the solar-type star HD 209458 demonstrated that the planet has low average density, and likely posesses a massive atmosphere. Most scenarios assume that planets with massive gaseous atmospheres formed at several AU and then migrated toward the star due to the tidal interaction with remnant circumstellar disk. This paper investigates in some details a model according to which a massive planet can be formed near the inner edge of the protoplanetary disk. Higher than in the solar nebula surface density is required. The disk truncation by the stellar magnetosphere is also important. Planetesimals are concentrated in a region with maximal gas pressure, allowing a massive core formation, and a run-away accretion of the massive atmosphere. The migration of the planet is governed by a balance between tidal friction of the disk, resulting to the loss of orbital angular momentum by the planet, and the acquiring of the orbital angular momentum through the gas accretion in the presence of positive gradient of the surface density in a gaseous disk. I will discuss critical parameters which determine a possiblity of the formation of planetary systems with planets in the stellar proximity, and specify some observational characteristics of stars which are more likely to have planetary systems.
No associations
LandOfFree
Massive Inner Planets: Origin, and What Stars They Orbit. 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 Massive Inner Planets: Origin, and What Stars They Orbit., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Massive Inner Planets: Origin, and What Stars They Orbit. will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1122244