Sökning: "massive stars"

Visar resultat 16 - 20 av 44 uppsatser innehållade orden massive stars.

  1. 16. Escaping Compact Object Binaries from Globular Clusters

    Kandidat-uppsats, Lunds universitet/Astronomi - Genomgår omorganisation

    Författare :Annie Csomor; [2022]
    Nyckelord :Compact object binaries; binary black holes; BH-NS binaries; escaping binaries; globular clusters; escaping compact object binaries from globular clusters; escaping compact binaries; Physics and Astronomy;

    Sammanfattning : Since 2015, the LIGO-Virgo-KAGRA scientific collaboration (LVK) has detected gravitational waves from more than 90 merging compact object binaries using ground-based interferometric detectors. Compact objects orbiting in binary systems emit gravitational waves leading to a loss of energy. LÄS MER

  3. 17. On Fermi-like neutrino acceleration in core-collapsesupernovae and around black hole formation, andthe evolution of observable neutrino flux duringproto-neutron star collapse

    Master-uppsats, Stockholms universitet/Institutionen för astronomi

    Författare :Samuel Gullin; [2021]
    Nyckelord :core collapse black hole neutrino acceleration supernova;

    Sammanfattning : Failed supernovae are the implosive final fates of massive stars, where ablack hole is formed. During the collapse, the proto-neutron star emits a huge number of neutrinos, and when the black hole is finally formed, it engulfs theneutrino-emitting material and the signal is cut off. LÄS MER

  4. 18. 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

  5. 19. The visibility of double neutron star binaries to LISA

    Kandidat-uppsats, Lunds universitet/Astronomi - Genomgår omorganisation

    Författare :Anatole Storck; [2021]
    Nyckelord :gravitational waves; LISA; neutron stars; orbital simulations; Runge-Kutta method; Physics and Astronomy;

    Sammanfattning : Double neutron star binaries (DNSBs) in the mHz gravitational wave (GW) regime are an important group of objects which the GW detector LISA will be able to observe. The detection and parametrization of these objects will help develop our current understanding of neutron star formation and evolution. LÄS MER

  7. 20. The retention of black holes in globular clusters

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

    Författare :Wuxueman Liu; [2021]
    Nyckelord :Physics and Astronomy;

    Sammanfattning : We simulate the velocities of formed Black Holes to determine the fraction of retained Black Holes in 152 Globular Clusters. The model we used for the escape velocity is from Plummer. The scenarios of the natal kick are Neutronstar like kicks and momentum conserving kicks. LÄS MER