منابع مشابه
Planetary migration in protoplanetary disks
In the current paper, we further develop the model for the migration of planets introduced in Del Popolo et al. (2001) and extended to timedependent planetesimal accretion discs in Del Popolo & Ekşi (2002). We use a method developed by Stepinski & Valageas (1996, 1997), that is able to simultaneously follow the evolution of gas and solid particles for up to 10yr. The disc model is coupled to th...
متن کاملGravitational Stirring in Planetary Debris Disks
We describe gravitational stirring models of planetary debris disks using a new multi-annulus planetesimal evolution code. The current code includes gravitational stirring and dynamical friction; future studies will include coagulation, fragmentation, Poynting-Robertson drag, and other physical processes. We use the results of our calculations to investigate the physical conditions required for...
متن کاملH2D+ line emission in Proto-Planetary Disks
Context. Previous studies have indicated that the 372.4 GHz ground transition of ortho-H2D might be a powerful probe of Proto-Planetary Disks. The line could be especially suited for study of the disk mid-plane, where the bulk of the mass resides and where planet formation takes place. Aims. Provide detailed theoretical predictions for the line intensity, profile and maps expected for represent...
متن کاملDeuterated H + 3 in proto - planetary disks
Probing the gas and dust in proto-planetary disks is central for understanding the process of planet formation. In disks surrounding solar type protostars, the bulk of the disk mass resides in the outer midplane, which is cold (≤20 K), dense (≥ 107 cm−3) and depleted of CO. Observing the disk midplane has proved, therefore, to be a formidable challenge. Ceccarelli et al. (2004) detected H2D emi...
متن کاملUnraveling Circumstellar Disks and Early Planetary Growth
The solar system formed 4.5–4.6 billion years ago (Patterson 1956) by collapse of a portion of a molecular cloud of gas and dust rather like the Eagle or Orion nebulae. Some of the star dust from the solar nebula has now been isolated from primitive meteorites. The isotopic compositions of many elements in these grains are vastly different from those of our solar system and provide fingerprints...
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ژورنال
عنوان ژورنال: The Astronomical Journal
سال: 2017
ISSN: 1538-3881
DOI: 10.3847/1538-3881/153/3/124