نتایج جستجو برای: earths

تعداد نتایج: 1434  

Journal: :The astrophysical journal 2021

We propose a planet formation scenario to explain the elevated occurrence rates of transiting planets around M dwarfs compared sun-like stars discovered by Kepler. use pebble drift and accretion model simulate growth cores inside outside snow line. A smaller size interior line delays super-Earths, allowing giant in outer disk form first. When those reach isolation mass they cut off flow pebbles...

Journal: :Materials Today 2012

Journal: :Physics Today 2021

I have enjoyed reading several items on the rare-earth elements in Physics Today over past few years. David Kramer’s most recent piece focused topic (February 2021, page 20) was about neodymium-based magnets, but readers might be interested to learn of another class magnets based samarium. Among their applications are traveling wave tubes (TWTs), which form backbone world’s entire space communi...

Journal: :Astronomy and Astrophysics 2021

The conditions in the protoplanetary disc are determinant for various planet formation mechanisms. We present a framework which combines self-consistent structures with calculations of growth rates planetary embryos via pebble accretion, order to study Super-Earths. first perform 2D hydrodynamical simulations inner discs, considering grain size distribution multiple chemical species and their c...

Journal: :Nature Reviews Physics 2019

2011
Nathan Henderson

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Journal: :The Astrophysical Journal 2011

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