Search for dissertations about: "nebulae"
Showing result 1 - 5 of 7 swedish dissertations containing the word nebulae.
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1. Measurements of High-Precision Atomic Data with Applications to Astrophysics and Cosmology
Abstract : Investigations of astrophysical spectra require accurate atomic data, such as wavelengths and transition probabilities. This thesis provides high-precision atomic data for astrophysical and cosmological applications. The measurements have been carried out using Fourier transform spectrometry on light produced in a hollow cathode light source. READ MORE
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2. Supernova remnants and their pulsar wind nebulae
Abstract : Massive stars die in powerful stellar explosions, so-called supernovae. In most cases, a neutron star or a black hole is expected to form in the center. The ejected material in these explosions expands out into the surroundings for tens of thousands of years, forming a supernova remnant. If a rapidly rotating neutron star, i. READ MORE
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3. Reaching for the Stars : Studies in the History of Swedish Stellar and Nebular Astronomy, 1860–1940
Abstract : This study considers astrophysics, stellar and nebular astronomy in Sweden. Emphasis is on the role of scientific technologies and practice, and the emergence of a modern observational astronomy, supplanting classical astronomy as the most vital field of Swedish astronomy. READ MORE
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4. The faintest stars : A study of white, red and brown dwarfs
Abstract : The local space density of the faintest stars, including M dwarfs, white dwarfs and brown dwarfs has been studied by two different methods.By using dark nebulae as opaque outer screens, the luminosity functions of M dwarfs and white dwarfs were studied as volume-limited and dynamically unbiassed foreground samples. READ MORE
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5. Companion wind shaping in binaries involving an AGB star
Abstract : Stars of initial masses between 0.8-8 M☉ will become "asymptotic giant branch" (AGB) stars during the final stages of their evolution. During this phase, the stars are characterized by low velocity and high-density winds. READ MORE