Search for dissertations about: "— quasars: absorption lines"

Found 5 swedish dissertations containing the words — quasars: absorption lines.

  2. 1. Interstellar absorption across the electromagnetic spectrum

    Author : Achim Tappe; Chalmers tekniska högskola; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; interstellar medium ISM : general; supernova remnants Crab Nebula ; emission lines; — quasars: absorption lines;

    Abstract : We report results of a multi-wavelength study of interstellar absorption in diffuse molecular clouds that lie in the direction of flat-spectrum quasars. Quasars as back-ground sources allow the measurement of Galactic interstellar absorption across the electromagnetic spectrum from mm to X-ray wavelengths. READ MORE

  4. 2. Interferometric observations of H -absorbing gas in active galaxies

    Author : Ylva Pihlström; Chalmers tekniska högskola; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; galaxies: absorption lines; galaxies: active; galaxies: ISM; quasars: absorption lines; radio lines: galaxies;

    Abstract : .... READ MORE

  5. 3. Observations and astrophysical modelling of the interstellar medium

    Author : Achim Tappe; Chalmers tekniska högskola; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; ISM:individual: Gum nebula ; emmission lines; quasars: individual: PKS B2145 067 ; HII regions; quasars: absorption lines; interstellar medium ISM : general; stars: individual: Zeta Puppis ;

    Abstract : .... READ MORE

  6. 4. A study of galaxy evolution: stacking emission lines from distant galaxies

    Author : Jean Baptiste Jolly; Chalmers tekniska högskola; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Galaxies: evolution – Galaxies: high-redshift – methods: stacking – methods: data analysis – techniques: interferometric;

    Abstract : To draw up a thorough description of galaxy evolution exhaustive observations are needed, of distant but mainly of faint galaxies. Describing low mass galaxies is important to move the focus from the tip of the iceberg. READ MORE

  7. 5. The death throes of massive stars

    Author : Sofia Wallström; Chalmers tekniska högskola; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; submillimeter: ISM -- ISM: supernova remnants -- ISM: individual objects: Cassiopeia A -- circumstellar matter -- stars: AGB and post-AGB -- stars: mass-loss -- stars: individual: IRAS 17163-3907 -- quasars: absorption lines -- quasars: individual: B 0218 357 -- galaxies: ISM -- galaxies: abundances -- ISM: molecules;

    Abstract : Massive evolved stars affect their local surroundings as they go through phases of intense mass-loss and eventually explode as supernovae, adding kinetic energy and freshly synthesised material to the interstellar medium. The circumstellar material ejected by the star affects the shape and evolution of the future supernova remnant, and how the material is incorporated into the interstellar medium. READ MORE