Sökning: "vad är gravitation"

Visar resultat 6 - 10 av 16 uppsatser innehållade orden vad är gravitation.

1. 6. Formation and Evolution of Protoplanetary Disks

   Master-uppsats, Lunds universitet/Astronomi - Genomgår omorganisation

   Författare :Johan Appelgren; [2019]
   Nyckelord :protoplanetary disk; protoplanetary disk formation; protoplanetary disk evolution; planet formation; Physics and Astronomy;

   Sammanfattning : A star forms with a surrounding protoplanetary disk after the collapse of a molecular cloud core. Subsequently, over a period of several Myr this protoplanetary disk of dust and gas is accreted onto the host star. We model the formation and evolution of such a protoplanetary disk using a one-dimensional numerical model. LÄS MER

3. 7. Development, Testing and Future Outlook of a Penalized Spline as a Representation of the Standard Model Background in Dijet Searches

   Kandidat-uppsats, Lunds universitet/Partikel- och kärnfysik; Lunds universitet/Fysiska institutionen

   Författare :Alexander Ekman; [2017]
   Nyckelord :spline; p-spline; SPLINTER; b-spline; penalized spline; standard model; standard model background; SM; SMB; dijet; ATLAS; dark matter; MadGraph; python; Physics and Astronomy;

   Sammanfattning : The aim of this thesis is to develop, test and evaluate a penalized basis spline as a method for representing the Standard Model background in dijet searches from proton-proton collisions at the Large Hadron Collider. Current representations of the Standard Model background are complex and dependent on current assumptions of the Standard Model. LÄS MER

4. 8. Hyperfine structure measurements in scandium for IR spectroscopy

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

   Författare :Felix van Deelen; [2017]
   Nyckelord :Astrophysics; Atomic Data; Hyperfine Structure; Stellar Spectroscopy; Physics and Astronomy;

   Sammanfattning : Stellar abundances are important for understanding the chemical evolution of galaxies and provide us with constraints on stellar evolution and supernova nucleosynthesis. To determine stellar abundances accurately, atomic data is crucial. This data is incomplete for many elements, especially in the infrared region. LÄS MER

5. 9. Can there be an Earth-like planet in HD37605?

   Kandidat-uppsats, Lunds universitet/Astronomi - Genomgår omorganisation

   Författare :Johan Appelgren; [2017]
   Nyckelord :Orbital stability; Dynamics; Exoplanets; Physics and Astronomy;

   Sammanfattning : Detection of Earth-mass planets on orbits around 1 AU with the radial velocity method has so far not been possible, the Doppler velocity they induce on their host star is too small to be detected. Planetary systems detected with the radial velocity method might then contain undetected Earth-like planets. LÄS MER

7. 10. Solar System analogues among exoplanetary systems

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

   Författare :Maria Lomaeva; [2016]
   Nyckelord :Physics and Astronomy;

   Sammanfattning : Over the past two decades many discoveries of exoplanets have been made, which have drawn much attention to extrasolar planetary systems. In this work we study the composition of these systems and search for analogues of the Solar System. We considered the planets in the database at exoplanet.eu. LÄS MER