Blättern Fakultät für Physik (inkl. GAUSS) nach "Niemeyer, Jens Prof. Dr." Betreuer
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Galaxy Formation With Ultralight Bosonic Dark Matter
(2020-05-18)Ultralight bosonic particles forming a coherent state are dark matter candidates with distinctive wave-like behaviour on the scale of dwarf galaxies and below. In this thesis, a new simulation technique for ultralight ... -
Large Eddy Simulationen von isolierten Scheibengalaxien
(2014-12-18)In this thesis I present a newly developed, dynamical model for the turbulent, star-forming interstellar medium on scales of some ten parsecs, which is named MIST (Multi-phase Interstellar medium model with Star formation ... -
Modelling turbulent effects of stellar feedback in cosmological simulations
(2017-10-30)In order to study the influence of turbulence on star formation, stellar feedback, and the mixing of metals into the circumgalactic medium (CGM), we implemented a model for star formation and stellar feedback and employ ... -
Simulating Structure Formation with Ultra-light Bosonic Dark Matter
(2019-01-16)Despite being a cornerstone of the standard model of cosmology, the exact nature of dark matter (DM) remains unknown. The lack of evidence for weakly interacting massive particles that could constitute DM is generating ... -
Simulations of Bosonic Dark Matter
(2021-11-05)Dark matter is a hypothetical form of matter, which is thought to make up nearly $27\%$ of the contents in our Universe. An increasingly popular idea is that the dark matter could be composed of light (pseudo-)scalar ... -
Simulations of Cosmological Structure Formation with Nonrelativistic Scalar Fields
(2023-01-20)Nonrelativistic, self-gravitating scalar fields are of current interest in several scenarios of cosmological structure formation. This includes the gravitational clustering of dark matter in the late-time Universe which ... -
Structure Formation with Ultralight Axion Dark Matter
(2019-09-23)Ultralight axion is a scalar field with an extremely small mass $\sim10^{-22} eV$. It is proposed as an alternative dark matter candidate to the standard cold dark matter (CDM). If self-interactions between axions can be ... -
The Influence of Small-Scale Anisotropies and the Large-Scale Environment on the Observed Properties of Lyman-Alpha Emitters
(2014-12-15)Lyman-alpha emitters have become an important tool for the study of star formation, galaxy formation and galaxy evolution. However, the non-linear radiative transport of Lyman-alpha radiation remains a puzzling problem. ...