Sökning: "Astrometry"

Visar resultat 1 - 5 av 8 uppsatser innehållade ordet Astrometry.

  1. 1. 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

  3. 2. Identifying Gravitationally Lensed QSO Candidates with eROSITA

    Master-uppsats, Uppsala universitet/Observationell astrofysik

    Författare :Róisín O'Rourke Brogan; [2020]
    Nyckelord :active galactic nuclei; agn; erosita; gaia; gravitational lensing; quasi-stellar objects; strong lensing; multiple images;

    Sammanfattning : As of June 2020, the first all-sky X-ray survey with the eROSITA instrument aboard the spacecraft Spektr-RG has been completed. A high percentage of the 1.1 million objects included in the survey are expected to be active galactic nuclei (AGN). LÄS MER

  4. 3. Simulation of Solar System Objects for the NISP instrument of the ESA Euclid Mission

    Master-uppsats, Luleå tekniska universitet/Institutionen för system- och rymdteknik

    Författare :Vanshika KANSAL; [2018]
    Nyckelord :Solar System Objects; NISP; Spectroscopy; photometry; Euclid;

    Sammanfattning : Euclid is a medium class mission designed to study the geometry of dark universe. It will work in the visible and near infrared imaging & spectroscopy for a lifetime of 6 years down to the magnitude of mAB = 24. LÄS MER

  5. 4. The detectability of single- and multiple-planet systems in Gaia data

    Kandidat-uppsats, Lunds universitet/Astronomi - Genomgår omorganisation

    Författare :Martin Gustavsson; [2015]
    Nyckelord :Gaia; Astrometry; Exoplanets; Orbit-fitting; Physics and Astronomy;

    Sammanfattning : The all-sky survey of Gaia will generate vast amounts of astrometric data, in which there are expected to be thousands of planets found. Finding a system of $n_\textup{p}$ planets requires fitting of a total $5+7n_\textup{p}$ parameters: five astrometric and seven Keplerian parameters for every planet. LÄS MER

  7. 5. Astrometric Lensing - What Gaia can and cannot do

    Master-uppsats, Lunds universitet/Astronomi - Genomgår omorganisation; Lunds universitet/Institutionen för astronomi och teoretisk fysik - Genomgår omorganisation

    Författare :Giorgi Kokaia; [2014]
    Nyckelord :Astrometry Gaia Gravitational Lensing Invisible Bodies Mass Determination; Physics and Astronomy;

    Sammanfattning : Context: Data from the recently launched astrometric satellite Gaia will be coming in soon with the final data release expected in 2022. This will provide a very precise map of the Galaxy. The Solar system and Galaxy is thought to be filled with invisible bodies (planetesimals, planets, brown dwarfs, neutron stars, black holes, etc. LÄS MER