Sökning: "pebble accretion"

Visar resultat 6 - 8 av 8 uppsatser innehållade orden pebble accretion.

1. 6. Giant planet formation around HR8799

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

   Författare :Dan Wallsby; [2017]
   Nyckelord :HR8799; Planet formation; Protoplanetary disks; Giant planets; Astronomy; Migration; Dynamics; Physics and Astronomy;

   Sammanfattning : In the thriving field of exoplanet research new discoveries are made all the time, and while most of the observed systems can be explained with classical planet formation models - some are much harder to explain. When stars form they are often surrounded by the remaining material of the nebulae they formed from. LÄS MER

3. 7. 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

4. 8. Formation of super-Earths via pebble accretion onto planetesimals

   Kandidat-uppsats, Lunds universitet/Astronomi - Genomgår omorganisation

   Författare :Daniel Mikkola; [2015]
   Nyckelord :planet; formation; planet formation; exoplanets; pebble; accretion; pebble accretion; Physics and Astronomy;

   Sammanfattning : Data from NASA's Kepler space telescope, which searches for exoplanets via the transit method, produced 1108 new planetary candidates in 2013 with a total of 91% being smaller than Neptune in size. These were mostly super-Earths, terrestial planets between Earth and Neptune in size, with orbits around 10 days. LÄS MER