Sökning: "Astronomi"

Visar resultat 36 - 40 av 581 uppsatser innehållade ordet Astronomi.

  1. 36. Investigating a possible dearth of stars with zero angular momentum in the solar neighbourhood.

    Kandidat-uppsats, Lunds universitet/Astronomi - Genomgår omorganisation; Lunds universitet/Fysiska institutionen

    Författare :Aayush Desai; [2023]
    Nyckelord :Galaxy: disk; Galaxy: fundamental parameters; Galaxy: kinematics and dynamics; Galaxy: nucleus; solar neighborhood; stars: kinematics and dynamics; Physics and Astronomy;

    Sammanfattning : Background. Carlberg & Innanen (1987) first proposed the idea of measuring the solar re- flex velocity (the velocity of the Sun around the galactic centre), Vg,⊙, using the momenta of the stars in the solar neighbourhood. The proposal was a consequence of the work of L. LÄS MER

  3. 37. Combining Hipparcos and Gaia data: Improved Astrometric Calculations With Orvara

    Kandidat-uppsats, Lunds universitet/Astrofysik; Lunds universitet/Fysiska institutionen

    Författare :Melvin Tham; [2023]
    Nyckelord :Astrometry; Af Leporis; Smethells 119; Gliese 105; Gliese 86; Orvara; Hipparcos; Gaia; Physics and Astronomy;

    Sammanfattning : Hipparcos and Gaia are two missions intended to catalogue positions and motions of stellar objects. Orvara is a computer program which aims to combine the data from these two missions to calculate Keplerian parameters for stellar systems. LÄS MER

  4. 38. Searching for direct collapse black holes using the James Webb Space Telescope

    Master-uppsats, Uppsala universitet/Institutionen för fysik och astronomi

    Författare :Edison Arellano Almeida; [2022]
    Nyckelord :extragalactic astronomy;

    Sammanfattning : Recent detections of massive quasars at z > 6 has proven to be an interesting challengefor cosmology given the short time frame that these objects have to reach a certainmass via conventional methods (e.g., galaxy mergers). LÄS MER

  5. 39. Connecting dust emission and absorption

    Kandidat-uppsats, Stockholms universitet/Institutionen för astronomi

    Författare :Alice Knutas; [2022]
    Nyckelord :;

    Sammanfattning : .... LÄS MER

  7. 40. Installation av en ackumulatoratank på Sandvik Coromant i Gimo

    Kandidat-uppsats, Uppsala universitet/Institutionen för fysik och astronomi

    Författare :Maria Dryagina; Agnes Dahlberg; Jakob Brisback; Dena Azarang; Johanna Gustavsson; Filippa Norrman; August Broberg; [2022]
    Nyckelord :Fjärrvärme; Ackumulatortank; Termodynamik;

    Sammanfattning : Sandvik Coromant in Gimo wants to implement an accumulator tank to reduce their usage of fossil fuelsand therefore lessen their climate impact. The system implemented at the moment is dimensioned fortemperatures down to -14◦C, but at lower temperature the system cannot meet the demands. That is whenthe industry needs to use oil as backup. LÄS MER