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Showing result 1 - 5 of 13 swedish dissertations matching the above criteria.

  2. 1. High Resolution Observations of Masers

    Author : Jiyune Yi; Chalmers tekniska högskola; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES;

    Abstract : Cosmic masers are associated with both the early and late stages in the life of a star. High resolution observations of maser emissions are unique tools to study the physical and chemical environments in and around young stellar and protostellar objects, and around stars at the end of their life. READ MORE

  4. 2. A quantum-chemical study to the magnetic characteristics of methanol and its applications in astronomy

    Author : Boy Lankhaar; Chalmers tekniska högskola; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; methanol; maser polarization; star formation; magnetic fields; masers;

    Abstract : Magnetic fields play an important role during star formation. Direct magnetic field strength observations have proven specifically challenging in the dynamic protostellar phase. READ MORE

  5. 3. Instrumental and observational studies in radio astronomy : low noise amplifier design and methanol maser research

    Author : Vincent Minier; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; circumstellar matter; HEMT; matching circuitry design; techniques: interferometric; masers; microwave; low noise amplifier; HII regions; stars: formation;

    Abstract : .... READ MORE

  6. 4. Methanol Masers: Tracer of Star Formation

    Author : Vincent Minier; Chalmers tekniska högskola; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Abstract : The Onsala VLBI group has been conducting an extensive study of the Northern hemisphere methanol masers using the European VLBI Network (EVN) and the VLBA since early 1997. In parallel, a blind survey of the Galactic plane has been undertaken in order to discover new 6. READ MORE

  7. 5. High Resolution Studies of Circumstellar Masers

    Author : Francisco Colomer Sanmartin; Chalmers tekniska högskola; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Abstract : This thesis describes in detail the observational procedures that we have followed and developed to analyze several research projects organized at Onsala since 1990 to study the regions of SiO maser emission at 43 GHz in the circumstellar envelopes of late-type stars with very high angular resolution. The compact nature of these SiO maser regions has been demonstrated in this work. READ MORE