Sökning: "protoplanetary disc"

Visar resultat 6 - 7 av 7 uppsatser innehållade orden protoplanetary disc.

1. 6. The chemical composition of hot and cold gas giants

   Kandidat-uppsats, Lunds universitet/Institutionen för astronomi och teoretisk fysik - Genomgår omorganisation; Lunds universitet/Astronomi - Genomgår omorganisation

   Författare :Linn Eriksson; [2016]
   Nyckelord :Planet formation; hot Jupiter; pebble accretion; Physics and Astronomy;

   Sammanfattning : Exoplanet surveys have identified a category of giant planets that orbit very close to their host stars - the so-called hot Jupiters. The origin of such hot Jupiters is a long standing puzzle and has been closely investigated since the first discovery of such planets in 1995. LÄS MER

3. 7. Ice condensation as a planet formation mechanism

   Master-uppsats, Lunds universitet/Astronomi - Genomgår omorganisation; Lunds universitet/Institutionen för astronomi och teoretisk fysik - Genomgår omorganisation

   Författare :Katrin Ros; [2012]
   Nyckelord :Physics and Astronomy;

   Sammanfattning : In models of dust growth in protoplanetary discs focus is typically on coagulation, a mechanism which unfortunately seems incapable of forming particles larger than centimeters. The main reasons for this are that collisions between larger particles lead to bouncing or fragmentation rather than sticking, and that particles approaching meter-sizes drift radially inwards in the disc due to interaction with the surrounding gas. LÄS MER