Sökning: "Stripped-envelope supernovae"

Hittade 4 avhandlingar innehållade orden Stripped-envelope supernovae.

  1. 1. Looking for the high-mass progenitors of stripped-envelope supernovae

    Författare :Emir Karamehmetoglu; Jesper Sollerman; Francesco Taddia; Punam Chandra; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Supernova; Supernovae; Stripped-envelope supernovae; SN Type Ibc; SN; SNe; SN progenitor; Type Ibn; Astronomy; astronomi;

    Sammanfattning : Stripped-envelope supernovae were thought to be the explosions of very massive stars (& 20 M) that lost their outer layers of hydrogen and/or helium in strong stellar winds. However, recent studies have highlighted that most stripped-envelope supernovae seem to be arising from rela- tively lower-mass progenitor stars in the 12 20 M(sun) range, creating a mystery about the fate of the higher-mass stars. LÄS MER

  3. 2. Stripped-envelope supernovae discovered by the Palomar Transient Factory

    Författare :Christoffer Fremling; Jesper Sollerman; Federica Bianco; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; supernovae; transients; Astronomy; astronomi;

    Sammanfattning : This thesis is based on research made by the intermediate Palomar Transient Factory [(i)PTF]. The focus is on stripped-envelope (SE) supernovae (SNe) discovered by (i)PTF, and it is closely tied to the research on the SE SN iPTF13bvn, that occurred in the nearby galaxy NGC 5806. LÄS MER

  4. 3. PTF12os and iPTF13bvn : Two stripped-envelope supernovae discovered by the Palomar Transient Factory

    Författare :Christoffer Fremling; Jesper Sollerman; Ross Church; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; sovernovae;

    Sammanfattning : This thesis is based on research made by the intermediate Palomar Transient Factory [(i)PTF], and it is particularly closely tied to the still ongoing research on the stripped-envelope (SE) supernova (SN), iPTF13bvn (Type Ib), that occurred in the nearby galaxy NGC 5806. This SN was initially thought to have been the explosion of a very massive Wolf-Rayet (WR) star, but I have shown that this is very likely not the case. LÄS MER

  5. 4. Observations of rare supernovae and their environments

    Författare :Francesco Taddia; Jesper Sollerman; Maryam Modjaz; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Supernova; stellar evolution; metallicity; circumstellar interaction; Astronomy; astronomi;

    Sammanfattning : Supernovae (SNe) are the final stage in the life of massive stars. Their explosion unbinds the progenitor star revealing its inner layers. The SN ejecta interact with the circumstellar material (CSM), providing further information on the progenitor star. LÄS MER