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- South African Radio Astronomy ObservatoryZA47 papers
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51 papers · 1 filter
Asymptotic Giant Branch Stars in the Phoenix Dwarf Galaxy
John Menzies, Michael Feast, Patricia Whitelock +3
JHKs near-infrared photometry of stars in the Phoenix dwarf galaxy is presented and discussed. Combining these data with the optical photometry of Massey et al. allows a rather cle…
Different approaches to the second order Klein-Gordon equation
Karim A. Malik, David Seery, Kishore N. Ananda
We derive the Klein--Gordon equation for a single scalar field coupled to gravity at second order in perturbation theory and leading order in slow-roll. This is done in two ways: w…
Saturation of Transverse Energy per Charged Hadron and Freeze-Out Criteria in Heavy-Ion Collisions
J. Cleymans, R. Sahoo, D. K. Srivastava +1
For beam energies from SPS to RHIC, the transverse energy per charged particle, , saturates at a value of approximately 0.8 GeV. A direct connection between th…
A general test of the Copernican Principle
Chris Clarkson, Bruce A. Bassett, Teresa Hui-Ching Lu
The recent discovery of apparent cosmic acceleration has highlighted the depth of our ignorance of the fundamental properties of nature. It is commonly assumed that the explanation…
Exteneded Longitudinal Scaling and the Thermal Model
J. Cleymans, J. Strümpfer, L. Turko
The property of extended longitudinal scaling of rapidity distributions was noticed recently over a broad range of beam energies. It is shown here that this property is consistent…
Strange quark mass from Finite Energy QCD sum rules to five loops
Cesareo A. Dominguez, Nasrallah F. Nasrallah, Raoul Röntsch +1
The strange quark mass is determined from a new QCD Finite Energy Sum Rule (FESR) optimized to reduce considerably the systematic uncertainties arising from the hadronic resonance…