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White dwarfs in the building blocks of the Galactic spheroid
Pim van Oirschot, Gijs Nelemans, Else Starkenburg +3
The galactic halo likely grew over time in part by assembling smaller galaxies, the so-called building blocks. We investigate if the properties of these building blocks are reflect…
The Signature of a Windy Radio Supernova Progenitor in a Binary System
Almog Yalinewich, Simon Portegies Zwart
Type II supernova progenitors are expected to emit copious amounts of mass in a dense stellar wind prior to the explosion. When the progenitor is a member of a binary, the orbital…
The origin of the two populations of blue stragglers in M30
Simon Portegies Zwart
We analyze the position of the two populations of blue stragglers in the globular cluster M30 in the Hertzsprung-Russell diagram. Both populations of blue stragglers are brighter t…
Modeling the Milky Way as a Dry Galaxy
Michiko S. Fujii, Jeroen Bédorf, Junichi Baba +1
We construct a model for the Milky Way Galaxy composed of a stellar disc and bulge embedded in a dark-matter halo. All components are modelled as -body systems with up to 8 bill…
Numerical verification of the microscopic time reversibility of Newton's equations of motion: Fighting exponential divergence
Simon Portegies Zwart, Tjarda Boekholt
Numerical solutions to Newton's equations of motion for chaotic self gravitating systems of more than 2 bodies are often regarded to be irreversible. This is due to the exponential…
The consequences of a nearby supernova on the early Solar System
Simon Portegies Zwart, Inti Pelupessy, Arjen van Elteren +2
If the Sun was born in a relatively compact open cluster, it is quite likely that a massive (10MSun) star was nearby when it exploded in a supernova. The repercussions of a superno…