83 citations · 580 across the 11 of their papers we have counts for
11 papers
A spectroscopic and kinematic survey of fast hot subdwarfs
S. Geier, U. Heber, A. Irrgang +19
Hot subdwarfs (sdO/B) are the stripped helium cores of red giants formed by binary interactions. Close hot subdwarf binaries with massive white dwarf companions have been proposed…
Runaway blue main-sequence stars at high Galactic latitudes. Target selection with Gaia and spectroscopic identification
Roberto Raddi, Andreas Irrgang, Ulrich Heber +2
Motivated by the historical identification of runaway main-sequence (MS) stars of early spectral type at high Galactic latitudes, we test the capability of Gaia at identifying new…
A stripped helium star in the potential black hole binary LB-1
Andreas Irrgang, Stephan Geier, Simon Kreuzer +2
The recently claimed discovery of a massive () black hole in the Galactic solar neighborhood has led to controversial discussions because it…
The EREBOS project -- Investigating the effect of substellar and low-mass stellar companions on late stellar evolution
V. Schaffenroth, B. N. Barlow, S. Geier +14
Eclipsing post-common envelope binaries are highly important for resolving the poorly understood, very short-lived common envelope phase. Most hot subdwarfs (sdO/Bs) are the bare H…
Hypervelocity stars in the Gaia era: Runaway B stars beyond the velocity limit of classical ejection mechanisms
Andreas Irrgang, Simon Kreuzer, Ulrich Heber
Young massive stars in the halo are assumed to be runaway stars from the Galactic disk. Possible ejection scenarios are binary supernova ejections (BSE) or dynamical ejections from…
A quantitative spectral analysis of 14 hypervelocity stars from the MMT survey
Andreas Irrgang, Simon Kreuzer, Ulrich Heber +1
Hypervelocity stars (HVSs) travel so fast that they may leave the Galaxy. The tidal disruption of a binary system by the supermassive black hole in the Galactic center is widely as…
PSR J1024-0719: A Millisecond Pulsar in an Unusual Long-Period Orbit
D. L. Kaplan, T. Kupfer, D. J. Nice +32
PSR J10240719 is a millisecond pulsar that was long thought to be isolated. However, puzzling results concerning its velocity, distance, and low rotational period derivative hav…
Three particles in a finite volume: The breakdown of spherical symmetry
Simon Kreuzer, Harald W. Grießhammer
Lattice simulations of light nuclei necessarily take place in finite volumes, thus affecting their infrared properties. These effects can be addressed in a model-independent manner…
The triton in a finite volume
Simon Kreuzer, H. -W. Hammer
Understanding the volume dependence of the triton binding energy is an important step towards lattice simulations of light nuclei. We calculate the triton binding energy in a finit…
On the modification of the Efimov spectrum in a finite cubic box
Simon Kreuzer, H. -W. Hammer
Three particles with large scattering length display a universal spectrum of three-body bound states called "Efimov trimers''. We calculate the modification of the Efimov trimers o…
Efimov physics in a finite volume
Simon Kreuzer, H. -W. Hammer
Three bosons with large scattering length show universal properties that do not depend on the details of the interaction at short distances. In the three-boson system, these proper…