Essays about: "white dwarfs"

Showing result 1 - 5 of 7 essays containing the words white dwarfs.

1. 1. Hyper-velocity stars from globular clusters hosting intermediate-mass black holes

   University essay from Lunds universitet/Astrofysik; Lunds universitet/Fysiska institutionen

   Author : Matilda Skantz; [2023]
   Keywords : Hypervelocity stars; run-away stars; stellar binary; intermediate mass black hole; globular cluster; Hills mechanism; Physics and Astronomy;

   Abstract : In 1988 Hills proposed that stars can gain velocities above 500 km s−1 if they are in a stellar binary which gets disrupted by a super massive black hole (SMBH). One of the stars would get trapped in an elliptical orbit around the SMBH while the other gets ejected and obtains a relatively high velocity. READ MORE

3. 2. Stellar Encounters at the Galactic Centre

   University essay from Lunds universitet/Astronomi - Genomgår omorganisation

   Author : Roberts Fisers; [2022]
   Keywords : Galaxy; encounter; SPH; NSC; Physics and Astronomy;

   Abstract : Using methods of smoothed particle hydrodynamics (SPH) an N -body simulation was set-up to investigate stellar encounters between a 1 solar-mass main sequence (MS) star, modeled after the Sun, and a 0.6 solar-mass white dwarf (WD). This was done primarily to investigate the assumptions made by Mastrobuono-Battisti et al. READ MORE

4. 3. Assessing the relationship between hypoxia and life on Earth, and implications for the search for habitable exoplanets

   University essay from Lunds universitet/Geologiska institutionen

   Author : Thomas Evan Smith; [2022]
   Keywords : hypoxia; hypoxia-inducible factors; atmospheric oxygen; multicellularity; embryogenesis; exoplanets; white dwarfs; oxygen fugacity; Earth and Environmental Sciences;

   Abstract : Atmospheric oxygen at the level of present-day Earth (21%) is generally regarded as permissive for the development and survival of complex multicellular life, such as animals. The hypothesis that oxic conditions are conducive for multicellular life has subsequently been applied to the search for life elsewhere in the universe, with planets exhibiting atmospheric oxygen of a similar level to Earth being considered as candidates for habitability. READ MORE

5. 4. Synergies between Gaia, LSST and LISA

   University essay from Lunds universitet/Astronomi - Genomgår omorganisation

   Author : Isabella Danaliv; [2020]
   Keywords : Gaia; LSST; LISA; telescope; synergies; multi-messenger; Physics and Astronomy;

   Abstract : The scientific development of astronomy today mainly comes from the information that can be obtained via electromagnetic radiation. Today, the Gaia optical telescope is one of the most ambitious space projects man has ever completed. Another optical telescope LSST is designed to complement Gaia. READ MORE

6. 5. The astronomical consequences of primordial black holes

   University essay from Lunds universitet/Astronomi - Genomgår omorganisation

   Author : Loke Lönnblad Ohlin; [2019]
   Keywords : Physics and Astronomy;

   Abstract : In the radiation or early matter dominated eras of the Universe, there is a theoretical possibility for the formation of black holes (BHs). These primordial black holes (PBHs) have been thought of as a possible candidate for dark matter (DM), and an attractive one at that as it would explain DM using only baryonic physics. READ MORE