Search for dissertations about: "Astrobiology"

Showing result 1 - 5 of 11 swedish dissertations containing the word Astrobiology.

  2. 1. Nitriles in Prebiotic Chemistry and Astrobiology

    Author : Hilda Sandström; Chalmers tekniska högskola; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; astrobiology; polymer chemistry; hydrogen cyanide; density functional theory; molecular dynamics; metadynamics; umbrella sampling; prebiotic chemistry;

    Abstract : Life appeared on Earth within a billion years of the planet’s formation. How? - no one knows. Theories regarding the origin of life involve reactions of molecules predicted to have existed on early Earth in what is called prebiotic chemistry. READ MORE

  4. 2. Studies in Molecular Astrophysics and Astrobiology

    Author : Eva Wirström; Chalmers tekniska högskola; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Submillimeter; Radio lines: ISM; Astrobiology; ISM: individual objects: Orion KL; Molecular data; ISM: molecules;

    Abstract : The molecules of the interstellar medium (ISM) can be used as probes of the physical conditions in a range of different types of interstellar environment, for example star forming regions. The first chapters of this thesis describe the theory and the observational techniques used to study the rotational transition emission from, and the present knowledge of, these molecules. READ MORE

  5. 3. Atmospheric Species and Spectral Radiation in Terrestrial Exoplanets : Implications for Astrobiology

    Author : Samuel Konatham; Javier Martin-Torres; María-Paz Zorzano Mier; Akos Kereszturi; Luleå tekniska universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Exoplanets; Atmospheres; Habitability; Human vision; Scotopic vision; Photopic vision; Spectral radaition; Atmosfärsvetenskap; Atmospheric science;

    Abstract : The physical properties of the planets and their parent stars are fundamental in the composition of atmospheres and radiative environments, which fundamentally determine their surface temperature and habitability. The atmospheric composition and radiation play a vital role in the emergence of life. READ MORE

  6. 4. Astrochemical Investigations of Complex Organics in Cold Molecular Cloud Cores

    Author : Tadeus Carl; Chalmers tekniska högskola; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; astrobiology; astrochemistry; ISM – molecular clouds; ISM – molecules; dark clouds;

    Abstract : Astrochemistry is the study of the formation and evolution of molecules in the interstellar medium (ISM) of the Milky Way and other galaxies. Molecules start to accumulate in the coldest and densest regions of the ISM, namely molecular clouds, and as of this date, 307 interstellar molecules are identified. READ MORE

  7. 5. Debris disks and the search for life in the universe

    Author : Gianni Cataldi; Alexis Brandeker; Jean-Charles Augereau; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; debris disks; astrobiology; Astronomy; astronomi;

    Abstract : Circumstellar debris disks are the extrasolar analogues of the asteroid belt and the Kuiper belt. These disks consist of comets and leftover planetesimals that continuously collide to produce copious amounts of circumstellar dust that can be observed as infrared excess or in resolved imaging. READ MORE