327 citations · 2.4k across the 55 of their papers we have counts for
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How important is secular evolution for black hole and neutron star mergers in 2+2 and 3+1 quadruple-star systems?
Pavan Vynatheya, Adrian S. Hamers
Mergers of black holes (BHs) and neutron stars (NSs) result in the emission of gravitational waves that can be detected by LIGO. In this paper, we look at 2+2 and 3+1 quadruple-sta…
First and second-generation black hole and neutron star mergers in 2+2 quadruples: population statistics
Adrian S. Hamers, Giacomo Fragione, Patrick Neunteufel +1
Recent detections of gravitational waves from mergers of neutron stars (NSs) and black holes (BHs) in the low and high-end mass gap regimes pose a puzzle to standard stellar and bi…
Was GW190412 born from a hierarchical 3+1 quadruple configuration?
Adrian S. Hamers, Mohammadtaher Safarzadeh
The gravitational wave source GW190412 is a binary black hole (BBH) merger with three unique properties: i) its mass ratio is about 0.28, the lowest found so far, ii) it has a rela…
Binary-binary scattering in the secular limit
Adrian S. Hamers, Johan Samsing
Binary-binary interactions are important in a number of astrophysical contexts including dense stellar systems such as globular clusters. Although less frequent than binary-single…
Formation and merging of Mass Gap Black Holes in Gravitational Wave Merger Events from Wide Hierarchical Quadruple Systems
Mohammadtaher Safarzadeh, Adrian S. Hamers, Abraham Loeb +1
We investigate secular evolution in hierarchical quadruple systems as a formation channel of mass-gap black holes (with masses of about ) in systems that will even…
Double neutron star mergers from hierarchical triple-star systems
Adrian S. Hamers, Todd A. Thompson
The isolated binary evolution model for merging neutron stars (NSs) involves processes such as mass transfer, common-envelope evolution, and natal kicks, all of which are poorly un…
Analytic computation of the secular effects of encounters on a binary: third-order perturbation, octupole, and post-Newtonian terms; steady-state distribution
Adrian S. Hamers, Johan Samsing
Dense stellar systems such as globular clusters are believed to harbor merging binary black holes (BHs). The evolution of such binaries is driven by interactions with other stars,…
The Effect of Distant Encounters on Black Hole Binaries in Globular Clusters: Systematic Increase of In-cluster Mergers in the LISA band
Johan Samsing, Adrian S. Hamers, Jacob G. Tyles
We present the first systematic study on how distant weak interactions impact the dynamical evolution of merging binary black holes (BBHs) in dense stellar clusters. Recent studies…
The impact of white dwarf natal kicks and stellar flybys on the rates of Type Ia supernovae in triple-star systems
Adrian S. Hamers, Todd A. Thompson
Type Ia supernovae (SNe Ia) could arise from mergers of carbon-oxygen white dwarfs (WDs) triggered by Lidov-Kozai (LK) oscillations in hierarchical triple-star systems. However, pr…
The impact of vector resonant relaxation on the evolution of binaries near a massive black hole: implications for gravitational wave sources
Adrian S. Hamers, Ben Bar-Or, Cristobal Petrovich +1
Binaries within the sphere of influence of a massive black hole (MBH) in galactic nuclei are susceptible to the Lidov-Kozai (LK) mechanism, which can drive orbits to high eccentric…
The rate of WD-WD head-on collisions in isolated triples is too low to explain standard type Ia supernovae
S. Toonen, H. B. Perets, A. S. Hamers
Type Ia supernovae (Ia-SNe) are thought to arise from the thermonuclear explosions of white dwarfs (WDs). The progenitors of such explosions are still highly debated; in particular…