Gravitoviscous Protoplanetary Disks with a Dust Component. V. The Dynamic Model for Freeze-out and Sublimation of Volatiles
نویسندگان
چکیده
Abstract The snowlines of various volatile species in protoplanetary disks are associated with abrupt changes gas composition and dust physical properties. Volatiles may affect growth, as they cover grains icy mantles that can change the fragmentation velocity grains. In turn, coagulation, fragmentation, drift through disk contribute to redistribution volatiles between ice phases. Here we present hydrodynamic model FEOSAD for two populations dynamics. We compute spatial distributions major molecules (H 2 O, CO , CH 4 CO) gas, on small grown dust, analyze over initial 0.5 Myr evolution. show most arrives surface coagulation Spiral structures rings forming disk, well photodissociation outer regions, lead formation complex snowline shapes multiple each species. During considered evolution, shift closer star, their final position being a factor 4–5 smaller than at epoch. demonstrate tend collect vicinity snowlines, both phases, leading thick potentially important size is affected by lower bare higher turbulent viscosity.
منابع مشابه
Dust in Protoplanetary Disks
We critically examine the best lines of evidence for grain growth in protoplanetary disks, based on modelling of observed spectral energy distributions and images of T Tauri and Herbig Ae stars. The data are consistent with millimeter-sized grains near disk midplanes, and micron-sized grains near disk surfaces. We review three channels by which grains can grow, including direct condensation fro...
متن کاملA submillimeter view of protoplanetary dust disks
We present some results from our submillimeter single-dish and aperture synthesis imaging surveys of protoplanetary disks using the JCMT, CSO, and Submillimeter Array (SMA) on Mauna Kea, Hawaii. Employing a simple disk model, we simultaneously fit the spectral energy distributions and spatially resolved submillimeter continuum emission from our SMA survey to constrain disk structure properties,...
متن کاملthe innovation of a statistical model to estimate dependable rainfall (dr) and develop it for determination and classification of drought and wet years of iran
آب حاصل از بارش منبع تأمین نیازهای بی شمار جانداران به ویژه انسان است و هرگونه کاهش در کم و کیف آن مستقیماً حیات موجودات زنده را تحت تأثیر منفی قرار می دهد. نوسان سال به سال بارش از ویژگی های اساسی و بسیار مهم بارش های سالانه ایران محسوب می شود که آثار زیان بار آن در تمام عرصه های اقتصادی، اجتماعی و حتی سیاسی- امنیتی به نحوی منعکس می شود. چون میزان آب ناشی از بارش یکی از مولفه های اصلی برنامه ...
15 صفحه اولinvestigating the feasibility of a proposed model for geometric design of deployable arch structures
deployable scissor type structures are composed of the so-called scissor-like elements (sles), which are connected to each other at an intermediate point through a pivotal connection and allow them to be folded into a compact bundle for storage or transport. several sles are connected to each other in order to form units with regular polygonal plan views. the sides and radii of the polygons are...
ذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 2021
ISSN: ['2041-8213', '2041-8205']
DOI: https://doi.org/10.3847/1538-4357/abe2b0