Sökning: "interstellar medium"

Visar resultat 1 - 5 av 12 uppsatser innehållade orden interstellar medium.

  1. 1. Probing the Structure of Ionised ISM in Lyman-Continuum-Leaking Green Pea Galaxies with MUSE

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

    Författare :Chinmaya Nagar; [2023]
    Nyckelord :Emission-line ratio; Gaussian convolution; Green pea galaxies; ISM; Ionised ISM; Lyman continuum LyC ; Low-Redshift Lyman Continuum Survey LzLCS ; Lyman continuum emitter LCE ; LyC escape; LyC escape fraction; MUSE; MPDAF; Voronoi binning;

    Sammanfattning : Lyman continuum (LyC) photons are known to be responsible for reionising the universe after the end of the Dark Ages, which marked a period called the Epoch of Reionisation (EoR). While these high-energy photons are thought to predominantly originate from young, hot, massive stars within the earliest galaxies, and contributions from high-energy sources like quasars and AGN, the origins of these photons are yet not well known and highly debated. LÄS MER

  3. 2. Investigating the central engine in supernova 2002ap using X-ray observations

    Kandidat-uppsats, KTH/Skolan för teknikvetenskap (SCI)

    Författare :Amanda Helmfrid; Richárd Bagi; [2021]
    Nyckelord :;

    Sammanfattning : Supernovae (SNe) are explosions following the death of massive stars. Core-collapse supernovae (CCSNe) occur when the heavy iron core of these stars collapse in on themselves. The resulting remnant of the core of a CCSN is a compact object: either a black hole or a neutron star. LÄS MER

  4. 3. The Milky Way and its Exoplanets

    Master-uppsats, Lunds universitet/Astronomi - Genomgår omorganisation

    Författare :Jesper Nielsen; [2021]
    Nyckelord :Planets and Satellites; Exoplanets; Occurrence Rates; Physics and Astronomy;

    Sammanfattning : The detections of over 4000 exoplanets as of today has shown that they exist in a wide range of different configurations, otherwise known as architectures. Recently, studies have been made trying to link the environment of host stars to the architectures of their planetary systems and have found that the architectures of planetary systems may not necessarily be uniform in the Milky Way. LÄS MER

  5. 4. Carbon Abundance in the Milky Way Galaxy

    Kandidat-uppsats, Lunds universitet/Astronomi - Genomgår omorganisation

    Författare :Calum Kvernes Macpherson; [2021]
    Nyckelord :Carbon; Abundance; Milky Way; Chemical Evolution; Physics and Astronomy;

    Sammanfattning : Carbon is the fourth most abundant element after hydrogen, helium and oxygen. It is a product of stellar nucleosynthesis as well as it being an important bio signature for life; this makes the analysis of carbon very fundamental. LÄS MER

  7. 5. Pulsation Properties in Asymptotic Giant Branch Stars

    Kandidat-uppsats, Uppsala universitet/Teoretisk astrofysik

    Författare :Ofelia Norgren; [2019]
    Nyckelord :Astronomy; Asymptotic Giant Branch stars; Stellar Evolution; Variable Stars; Power Spectrum;

    Sammanfattning : Asymptotic Giant Branch (AGB) stars are stars with low- to intermediate mass in a late stage in their stellar evolution. An important feature of stellar evolution is the ongoing nucleosynthesis, the creation of heavier elements. LÄS MER