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Disruption of a Proto-Planetary Disk by the Black Hole at the Milky Way Centre
Ruth A. Murray-Clay, Abraham Loeb
Recently, an ionized cloud of gas was discovered plunging toward the supermassive black hole, SgrA*, at the centre of the Milky Way. The cloud is being tidally disrupted along its…
Pair-Instability Supernovae at the Epoch of Reionization
Tony Pan, Daniel Kasen, Abraham Loeb
Pristine stars with masses between ~140 and 260 M_sun are theoretically predicted to die as pair-instability supernovae. These very massive progenitors could come from Pop III star…
Photon Trapping Enables Super-Eddington Growth of Black-Hole Seeds in Galaxies at High Redshift
Stuart Wyithe, Abraham Loeb
We identify a physical mechanism that would have resulted in rapid, obscured growth of seed super-massive black-holes in galaxies at z>6. Specifically, we find that the density at…
Constraining Sources of Ultra High Energy Cosmic Rays Using High Energy Observations with the Fermi Satellite
Asaf Pe'er, Abraham Loeb
We analyze the conditions that enable acceleration of particles to ultra-high energies, ~10^{20} eV (UHECRs). We show that broad band photon data recently provided by WMAP, ISOCAM,…
Pair-Instability Supernovae via Collision Runaway in Young Dense Star Clusters
Tony Pan, Abraham Loeb, Daniel Kasen
Stars with helium cores between ~64 and 133 M_sun are theoretically predicted to die as pair-instability supernovae. This requires very massive progenitors, which are theoretically…
Effect of Population III Multiplicity on Dark Star Formation
Athena Stacy, Andreas H. Pawlik, Volker Bromm +1
We numerically study the mutual interaction between dark matter (DM) and Population III (Pop III) stellar systems in order to explore the possibility of Pop III dark stars within t…