Search Publications
A search for annihilating dark matter in 47 Tucanae and Omega Centauri
Staveley-Smith, Lister; Bekki, Kenji; Westmeier, Tobias +1 more
A plausible formation scenario for the Galactic globular clusters 47 Tucanae (47 Tuc) and Omega Centauri $(ω$ Cen) is that they are tidally stripped remnants of dwarf galaxies, in which case they are likely to have retained a fraction of their dark matter cores. In this study, we have used the ultra-wide band receiver on the Parkes telescope (Murr…
The radioactive nuclei (\textbf{26}) Al and (\textbf{60}) Fe in the Cosmos and in the solar system
Wang, W.; Diehl, R.; den Hartogh, J. W. +15 more
The cosmic evolution of the chemical elements from the Big Bang to the present time is driven by nuclear fusion reactions inside stars and stellar explosions. A cycle of matter recurrently re-processes metal-enriched stellar ejecta into the next generation of stars. The study of cosmic nucleosynthesis and this matter cycle requires the understandi…
Thermonuclear Burst Observations for Model Comparisons: A Reference Sample
Galloway, Duncan K.; Goodwin, Adelle J.; Keek, Laurens
We present observations of thermonuclear (type-I) X-ray bursts, selected for comparison with numerical models. We provide examples of four distinct cases of ignition: He-ignition in mixed H/He fuel (case 1); He-ignition in pure He fuel, following exhaustion of accreted H by steady burning (case 2); ignition in (almost) pure He accumulated from an …
Measuring Cosmic Elements with Gamma-Ray Telescopes
Diehl, Roland
Gamma-ray telescopes are capable of measuring radioactive trace isotopes from cosmic nucleosynthesis events. Such measurements address new isotope production rather directly for a few key isotopes such as 44Ti, 26Al, 60Fe, and 56Ni, as well as positrons from the β+-decay variety. Experiments o…