activity
19992016
most citedThe LOFAR Two-metre Sky Survey - I. Survey Description and Preliminary Data Release

654 citations · 1.5k across the 11 of their papers we have counts for

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7 papers · 1 filter

astro-ph2007★ 17 cited

A parallel gravitational N-body kernel

Simon Portegies Zwart, Steve McMillan, Derek Groen +3

We describe source code level parallelization for the {\tt kira} direct gravitational -body integrator, the workhorse of the {\tt starlab} production environment for simulating…

astro-ph2006★ 276 cited

Star cluster disruption by giant molecular clouds

M. Gieles, S. F. Portegies Zwart, H. Baumgardt +4

We investigate encounters between giant molecular clouds (GMCs) and star clusters. We propose a single expression for the energy gain of a cluster due to an encounter with a GMC, v…

astro-ph2005★ 109 cited

Three-body encounters in the Galactic centre: the origin of the hypervelocity star SDSS J090745.0+024507

Alessia Gualandris, Simon Portegies Zwart, Michael Sipior

Hills (1988) predicted that runaway stars could be accelerated to velocities larger than 1000 km/s by dynamical encounters with the supermassive black hole (SMBH) in the Galactic c…

astro-ph2004★ 28 cited

Recycled pulsars with black hole companions: the high mass analogues of PSR B2303+46

M. S. Sipior, S. Portegies Zwart, G. Nelemans

We investigate the possibility that mass transfer early in the evolution of a massive binary can effect a reversal of the end states of the two components, resulting in a neutron s…

astro-ph2003★ 2 cited

Simulating the Early Evolution of the Hard X-Ray Properties of a Young Stellar Population

M. S. Sipior, M. Eracleous, S. Sigurdsson

We present an X-ray binary population synthesis model, and use it to simulate the evolution of X-ray binaries formed in a burst of star formation of duration 20 Myr and star-format…

astro-ph2002★ 19 cited

Nova Sco and coalescing low mass black hole binaries as LIGO sources

Michael S. Sipior, Steinn Sigurdsson

Double neutron star binaries, analogous to the well known Hulse--Taylor pulsar PSR 1913+16, are guaranteed-to-exist sources of high frequency gravitational radiation detectable by…