The discovery of planets orbiting nearby sunlike stars has shown that planetary systems can be surprisingly diverse and has raised many new questions about how they formed. The initial discovery in 1995 of the planet around the star 51 Pegasi by Mayor and Queloz at the University of Geneva was...
We present numerical hydrodynamical models of the effects of planets or brown dwarfs orbiting within the extended atmosphere and wind formation zone of Mira variables. We find time-dependent wake dynamics and episodic accretion phenomena that may give rise to observable optical events and affect SiO ...
Extrasolar planets and brown dwarfs around A--F type stars. VIII. A giant planet orbiting the young star HD113337techniques: radial velocitiesstars: early-typeplanetary systemsstars: individual: HD 113337In the frame of the search for extrasolar planets and brown dwarfs aroundearly-type main-...
Current planet-forming theory dictates that rocky worlds form over time as grains orbiting a protostar collide with each other and stick. Scientists previously thought that brown dwarfs have too few dusty particles, moving too quickly, for this process to happen. "We were completely surprised to ...
andbrowndwarfsorbitingnearbystars,includingτBoo,51Peg,υAnd,55 Cnc,ρCrB,70Vir,16CygB,and47UMa(Noyesetal.1997;Butleretal. 1997;Cochranetal.1997;Marcy&Butler1996;Butler&Marcy1996;Mayor &Queloz1995;Lathametal.1989).Table1liststhesenewly–discoveredplan- ...
Far fewer stars (<1%) harbor (5–80)MJUPcompanions. This brown dwarf desert for companions stands in contrast to the abundant brown dwarfs that are freely floating. 展开 关键词: STARS: PLANETARY SYSTEMS DOI: 10.1086/316516 被引量: 375 年份: 2000 ...
the latter is difficult to implement and difficult to quantify. We propose a single clearing timescale applicable to all stars, stellar remnants, and brown dwarfs. We propose a definition that is aligned with IAU recommendations, but we also examine potential difficulties relate...
Imaging planets around white dwarfs In 2001 we began a project to image planets and brown dwarfs orbiting around nearby white dwarfs. Our technique is to obtain two deep near infrared images (J˜24) of white dwarfs to search for faint cool companions. The images are sepa... M Burleigh,F...
What is not in dispute is that brown dwarfs can have orbiting planets, and in addition to the six newfound rogue worlds, Langeveld and Jayawardhana's team also discovered a brown dwarf in NGC 1333 with a planet, which is a fairly rare find in itself. "It's likely that such a pair ...
Inaddition, rare systems (such as planets orbiting brown dwarfs or black holes)that are presently lost in the noise would be clearly identified. In contrastto Kepler's current primary hunting ground of close-in planets, itsmicrolensing planets would be in the cool outer parts of solar systems...